Today's Message Index:
----------------------
1. 04:42 AM - Auto wiring issues (Cpayne)
2. 04:50 AM - Re: Re: Champion spark plug (Hans Oortman)
3. 04:53 AM - Re: Re: Champion spark plug (A. Dennis Savarese)
4. 05:25 AM - Re: Auto wiring issues (A. Dennis Savarese)
5. 05:29 AM - Re: Re: Champion spark plug (A. Dennis Savarese)
6. 09:47 AM - Re: Re: Magneto overhaul (doug sapp)
7. 10:18 AM - Re: Re: Magneto overhaul (=?UTF-8?B?SMOldmFyZCBEYWxl?=)
8. 10:35 AM - Re: Auto wiring issues (Cory Robin)
9. 10:53 AM - Re: Auto wiring issues (=?utf-8?Q?H=C3=A5vard_Dale?=)
10. 10:58 AM - Re: Re: Magneto overhaul (doug sapp)
11. 11:41 AM - Re: [Non-DoD Source] Re: Champion spark plug (Bitterlich, Mark G CIV NAVAIR, WD)
12. 11:43 AM - Re: [Non-DoD Source] Auto wiring issues (Bitterlich, Mark G CIV NAVAIR, WD)
13. 11:45 AM - Re: [Non-DoD Source] Re: Re: Champion spark plug (Bitterlich, Mark G CIV NAVAIR, WD)
14. 12:15 PM - Re: [Non-DoD Source] Re: Auto wiring issues (Bitterlich, Mark G CIV NAVAIR, WD)
15. 12:31 PM - Re: Re: Magneto overhaul (Jon Blake)
16. 01:09 PM - Re: [Non-DoD Source] Re: Re: Champion spark plug (Hans Oortman)
17. 01:26 PM - Re: [Non-DoD Source] Re: Re: Champion spark plug (Bitterlich, Mark G CIV NAVAIR, WD)
18. 01:46 PM - Re: [Non-DoD Source] Re: Auto wiring issues (=?UTF-8?B?SMOldmFyZCBEYWxl?=)
19. 01:59 PM - Re: [Non-DoD Source] Re: Auto wiring issues (=?UTF-8?B?SMOldmFyZCBEYWxl?=)
20. 04:17 PM - Auto plug conversion (Frank Stelwagon)
21. 11:07 PM - Re: Auto plug conversion (Jan Mevis)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Auto wiring issues |
In my experience, problems with auto wire conversions can be traced to installation
errors or not properly gaping the auto plugs. Anything more than .020" gap
will cause excessive resistance and load on magneto coils, especially at altitude.
This leads to misfiring, arcing in the distributor cap and mag coil damage.
Craig Payne
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Champion spark plug |
Chris and all,
I am using the automotive kit already for the last 6 years or so on my Yak52
and have no problems with it.
The radio I have been using until last year was a Becker 4201. Since august
last year I have a new radio because of the necessity for us in Europe to
change to 8.33 channel separation. This new radio is a Becker 6201. Pin
compatible(almost) with the 4201. Intercom is a PS Engineering PM1000.
Measurements I have done showed that the noise generated by the automotive
ignition kit is less than the original one. I have no noise whatsoever on my
radio and/or intercom.
You are talking about interference. With all do respect it has nothing to do
with interference but solely with the proper installation of the intercom
and the radio. From a electrical noise point of view the Yak by definition
is a terrible environment. DC generator, mechanical DC regulator, tacho
generator etc. In general noise enters a radio through the antenna.
When the noise enters the radio through the power supply it can be solved
easily by means of a filter which is readily available from Spruce. In your
case whereby you have noise on the intercom it can be solved satisfactory by
means of the use of a power filter on intercom's power input.
So what can be do more?
It all has to do with proper installation of the intercom and the radio.
Nowadays the modern radio's we use have digital IF and are less sensitive
for noise. They are well designed and the majority have DSP noise
suppression.
In order to find out whether noise is coming in the radio through the
antenna the best thing to do is to unscrew the antenna from the radio and
short circuit the connector(mostly a BNC). DO NOT PUSH THE PTT AT THIS POINT
BECAUSE YOU WILL PROBABLY BLOW UP THE FINAL AMPLIFIER OF THE TRANSMITTER.
If the noise is still there it will for almost certainly come into the radio
through the power supply. In that case install a powersupply noise
suppressor filter and a capacitor on the "plus" coming from the generator.
If the noise comes into the radio through the antenna there is really not a
lot you can do but in all cases my recommendation would be to install noise
suppressor filters on both magnets as well, i.e. on the leads which go to
the mag switch. These wires radiate a lot of noise and this radiated noise
can easily be suppressed by a capacitor. Normally these wires should be
shielded but in due time the shielding may have come loose from earth or are
terribly damaged.
Also make sure the radio is installed properly, that means, use the right
shielded cable. Do not connect ground to the shielding on both sides but
ONLY connect the shielding on the radioside. Ensure a good earth.
The problem with noise coming through the antenna is that noise is AM
modulated, which is the same type of modulation of the signals we generate
and receive with our radio. In other words our VHF radio is well equipped to
receive this type of noise. The design of the radio is there for also
important. Poorly designed radio's are much more susceptible to noise than
properly designed ones.
In our Yak environment I would go for the bigger names like Becker,
Funkwerk, Garmin, King etc. In this case it is fair to say:the cheaper the
radio the more chances you have for noise problems.
Hope this helps you a little bit.
Hans O.
PH-YAK
Op 07-03-16 06:37, Looigi <cdoburton@gmail.com> schreef:
>
> A friend of mine is also having interference issues since he fitted an
> automotive ignition plug conversion. His Yak 52 doesn't have a radio, but the
> noise is over the standard Russian intercom.
>
> He has changed the magnetos with a known good one but still no better.
>
> Has anyone found a solution to this issue? He doesn't want to go back to the
> old leads and I am going to be fitting a kit to mine once the Russian leads
> die.
>
> Cheers
> Chris
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=453488#453488
>
>
>
>
>
>
>
>
>
>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Champion spark plug |
Two possible fixes which has been used in the past is; first, make absolute
ly certain the shielding on the P lead is in fact soldered properly to the
P lead button, all the way around.=C2- Second, you can try installing the
following filter on each P lead.
http://www.aircraftspruce.com/catalog/elpages/lsMagFilter.php
Using the filter's mounting tab, you can mount the filter behind one of the
nuts on the accessory case rear, circular plate.=C2- Essentially, there
will be one filter at about the 10 o'clock position and one at the 2 o'cloc
k position on the rear plate.=C2- The filter is installed in series to th
e P lead.=C2- Be sure to solder the shield again to the P lead button.
Dennis=C2-
From: Looigi <cdoburton@gmail.com>
To: yak-list@matronics.com
Sent: Monday, March 7, 2016 12:37 AM
Subject: Yak-List: Re: Champion spark plug
A friend of mine is also having interference issues since he fitted an auto
motive ignition plug conversion.=C2- His Yak 52 doesn't have a radio, but
the noise is over the standard Russian intercom.
He has changed the magnetos with a known good one but still no better.
Has anyone found a solution to this issue?=C2- He doesn't want to go back
to the old leads and I am going to be fitting a kit to mine once the Russi
an leads die.
Cheers
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=453488#453488
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
S -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Auto wiring issues |
Excellent points Craig.=C2- I'd like to add to the "arcing in the distrib
utor cap" statement.=C2- An an improperly positioned rotor will and does
cause much more arcing in the distributor cap.Dennis
From: Cpayne <cpayne@joimail.com>
To: yak-list <yak-list@matronics.com>
Sent: Monday, March 7, 2016 7:17 AM
Subject: Yak-List: Auto wiring issues
In my experience, problems with auto wire conversions can be traced to inst
allation errors or not properly gaping the auto plugs. Anything more than .
020" gap will cause excessive resistance and load on magneto coils, especia
lly at altitude. This leads to misfiring, arcing in the distributor cap and
mag coil damage.
Craig Payne
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
S -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Champion spark plug |
Excellent point about proper installation, also as Hans and Craig have poin
ted out.
Dennis
From: Jan Mevis <jan.mevis@informavia.be>
To: "yak-list@matronics.com" <yak-list@matronics.com>
Sent: Monday, March 7, 2016 1:57 AM
Subject: Re: Yak-List: Re: Champion spark plug
The original Russian cables are 5mm thick. The modern ignition cables are
thicker, so you can=C2=B9t pull them thru the wiring harness.
Otherwise I would have kept it.
The modern plug cables also pass higher frequency components to the plug.
Therefore, more energy goes to the plug and you get a hotter spark.
As for the radio noise: a careful installation of a good radio could fix
that.
In EASA country, every Yak owner will have to replace the old Baklans or
other 25 kHz separated radio=C2=B9s with a modern 8.33 kHz separated model
soon
(2017, I think).
I personally am very satisfied with Dennis=C2=B9 plug wiring solution. I ha
ve
done several installations of it but also often changed the Russian
radio=C2=B9s.
Years ago, I had a Russian Ziabrik radio on my 50. This was a terribly bad
radio, still 50 kHz separated.
So I changed it for a Briz (or something like that). Only a slight
improvement.
Then I installed a Becker 4201 on my noisy Yak 50 and it worked
flawlessly. But I also changed the whole radio wiring, inclusive
PTT-cables, antenna and antenna cables etc.
Today I have a 8.33 kHz Filser Funkwerk ATR833.
Still the 8mm spiro-wound plug wires + NGK plugs AND an electronic
ignition in place of the right mag (Mark Bitterlich=C2=B9s design).
Very hot sparks, 120 kiloJoules, and more than one spark each time
(capacitive discharge, multiple spark system).
Radio works perfectly, engine sparks perfectly too and has consistently
higher CHT=C2=B9s since the electronic ignition.
@Dennis: I installed colder NGK=C2=B9s, the BR7HS instead, => gives me mo
re
equal CHT temperatures on my M14R 450 PS.
Jan
Yak 50 F-AZUK
On 07/03/16 07:15, "H=C3=A5vard Dale" <owner-yak-list-server@matronics.com
on
behalf of yaknorway52@gmail.com> wrote:
><yaknorway52@gmail.com>
>
>A suggestion from me is to re-wire original system with new wire style
>cables. Its a Good reason why original system is completly shielded.
>
>
>Br
>Havard
>
>
>Sendt fra min iPhone
>
>> Den 7. mar. 2016 kl. 06.37 skrev Looigi <cdoburton@gmail.com>:
>>
>>
>> A friend of mine is also having interference issues since he fitted an
>>automotive ignition plug conversion.=C2- His Yak 52 doesn't have a radi
o,
>>but the noise is over the standard Russian intercom.
>>
>> He has changed the magnetos with a known good one but still no better.
>>
>> Has anyone found a solution to this issue?=C2- He doesn't want to go b
ack
>>to the old leads and I am going to be fitting a kit to mine once the
>>Russian leads die.
>>
>> Cheers
>> Chris
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=453488#453488
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
S -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Magneto overhaul |
Seriously?? Are they really worth overhauling?? What does overhauled
mean?? I would honestly think that the price of a totally 100% new Chinese
mag is within a few bucks of what the overhauled price would be. Unless
your fighting with a "legal use" issue, I would think switching to the
Chinese mags would be the way to go.
Doug
On Sun, Mar 6, 2016 at 9:22 PM, Looigi <cdoburton@gmail.com> wrote:
>
> Hi there,
>
> I was at an overhaul facility for Yak 52's in Russia late last year. If
> you like I can get in touch with them and get a price for you?
>
> Cheers
> Chris
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=453487#453487
>
>
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Magneto overhaul |
Hi Doug,
Intresting, I am not familiar with what parts that are interchangeable
between Yak and CJ-6. Where do you all buy parts to the CJ-6? Direct from
China?
And the MAGS is all the same specification?
Med Vennlig Hilsen
Yak Norway
www.yaknorway.no
yaknorway52@gmail.com
Mobil: +47 952 50 103
Org No:916588054
2016-03-07 18:46 GMT+01:00 doug sapp <dougsappllc@gmail.com>:
> Seriously?? Are they really worth overhauling?? What does overhauled
> mean?? I would honestly think that the price of a totally 100% new Chinese
> mag is within a few bucks of what the overhauled price would be. Unless
> your fighting with a "legal use" issue, I would think switching to the
> Chinese mags would be the way to go.
>
> Doug
>
> On Sun, Mar 6, 2016 at 9:22 PM, Looigi <cdoburton@gmail.com> wrote:
>
>>
>> Hi there,
>>
>> I was at an overhaul facility for Yak 52's in Russia late last year. If
>> you like I can get in touch with them and get a price for you?
>>
>> Cheers
>> Chris
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=453487#453487
>>
>>
>>
>>
>>
>>
>>
>> ==========
>> br> fts!)
>> r> > w.buildersbooks.com" rel="noreferrer" target="_blank">
>> www.buildersbooks.com
>> rel="noreferrer" target="_blank">http://www.matronics.com/contribution
>> -Matt Dralle, List Admin.
>> ==========
>> List" rel="noreferrer" target="_blank">
>> http://www.matronics.com/Navigator?Yak-List
>> ==========
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
>> ==========
>> b Site -
>> -Matt Dralle, List Admin.
>> rel="noreferrer" target="_blank">http://www.matronics.com/contribution
>> ==========
>>
>>
>>
>>
>
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Auto wiring issues |
I can attest, that the auto plug conversion, if installed properly, is a
very worthwhile UPGRADE.
1. Use proper plugs (Resistor type)
2. Is it worth the money for iridium? (I don't know, some say it's not,
but I run them)
3. check and double check with meter all wires all the way into the cap
4. Enjoy a much better and smoother running engine.
Cory
wilgabeast.com
Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Auto wiring issues |
Most likely its in perfect condition so if anyone wants it? I sell it cheap.
Trade for a kit with new original spark plugs Could be a Good offer:-)
Br
Havard
Sendt fra min iPhone
> Den 7. mar. 2016 kl. 19.34 skrev Cory Robin <crobin@skyvantage.com>:
>
> I can attest, that the auto plug conversion, if installed properly, is a v
ery worthwhile UPGRADE.
>
> 1. Use proper plugs (Resistor type)
> 2. Is it worth the money for iridium? (I don't know, some say it's not, b
ut I run them)
> 3. check and double check with meter all wires all the way into the cap
> 4. Enjoy a much better and smoother running engine.
>
> Cory
>
> wilgabeast.com
Message 10
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Magneto overhaul |
Med,
There are a few items which are interchangeable between the Yak and the CJ6
aircraft, mags being just one of them. I am sure there are others reading
this post who can attest to the use of the Chinese CD5 mags on the M14P.
Interchangeable CJ/Yak parts:
1. Boost coil
2. Spark plugs
3. Tires
4. Wheel,nose
5. Wheels, main
6. All brake parts, including pads, clips, drums, expander tubes, etc.
7. internal workings of the differential brake valve
8. Internal workings of the brake pressure reducing valve
9. 3 port valve, gear and flaps
10. 5 port valve, gear
11. Stainless steel pneumatic filter
12. Many engine gaskets,including, rocker gaskets
13. Many 52 owners have used CJ6 boarding steps
The above list is from memory, I'm sure I have forgotten something.
Yes, my parts come direct from China. You can check out my existing
inventory on http://cj6.com/parts.
We will soon have the new style stainless steel Yak 52 main and emergency
air tanks in stock, just waiting for them to clear customs now.
Best,
Doug
Best,
Doug
On Mon, Mar 7, 2016 at 10:17 AM, H=C3=A5vard Dale <yaknorway52@gmail.com> w
rote:
> Hi Doug,
>
> Intresting, I am not familiar with what parts that are interchangeable
> between Yak and CJ-6. Where do you all buy parts to the CJ-6? Direct from
> China?
>
> And the MAGS is all the same specification?
>
>
> Med Vennlig Hilsen
>
> Yak Norway
> www.yaknorway.no
> yaknorway52@gmail.com
> Mobil: +47 952 50 103
> Org No:916588054
>
>
> 2016-03-07 18:46 GMT+01:00 doug sapp <dougsappllc@gmail.com>:
>
>> Seriously?? Are they really worth overhauling?? What does overhauled
>> mean?? I would honestly think that the price of a totally 100% new Chin
ese
>> mag is within a few bucks of what the overhauled price would be. Unless
>> your fighting with a "legal use" issue, I would think switching to the
>> Chinese mags would be the way to go.
>>
>> Doug
>>
>> On Sun, Mar 6, 2016 at 9:22 PM, Looigi <cdoburton@gmail.com> wrote:
>>
>>>
>>> Hi there,
>>>
>>> I was at an overhaul facility for Yak 52's in Russia late last year. I
f
>>> you like I can get in touch with them and get a price for you?
>>>
>>> Cheers
>>> Chris
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=453487#453487
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> ==========
>>> br> fts!)
>>> r> > w.buildersbooks.com" rel="noreferrer" target="_blank">
>>> www.buildersbooks.com
>>> rel="noreferrer" target="_blank">http://www.matronics.com/contribut
ion
>>> -Matt Dralle, List Admin.
>>> ==========
>>> List" rel="noreferrer" target="_blank">
>>> http://www.matronics.com/Navigator?Yak-List
>>> ==========
>>> FORUMS -
>>> eferrer" target="_blank">http://forums.matronics.com
>>> ==========
>>> b Site -
>>> -Matt Dralle, List Admin.
>>> rel="noreferrer" target="_blank">http://www.matronics.com/contribut
ion
>>> ==========
>>>
>>>
>>>
>>>
>>
>
Message 11
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Champion spark plug |
There ya go.
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Hvard Dale
Sent: Sunday, March 06, 2016 11:06 PM
Subject: [Non-DoD Source] Re: Yak-List: Champion spark plug
Hi,
Becker AR 4201 radio
Med Vennlig Hilsen
Yak Norway
www.yaknorway.no
yaknorway52@gmail.com
Mobil: +47 952 50 103
Org No:916588054
2016-03-06 23:24 GMT+01:00 A. Dennis Savarese <dsavarese0812@bellsouth.net>:
What brand and model radio do you have?
Dennis
________________________________
From: Hvard Dale <yaknorway52@gmail.com>
To: yak-list@matronics.com
Sent: Sunday, March 6, 2016 8:50 AM
Subject: Re: Yak-List: Champion spark plug
Hi Richard,
I had mounted the auto kit and experienced more radio noise, more and faster
arching on distributor caps, breaker points. Checked the cables and the
resistence on the cable i got is higher than original wire type cable, with the
result in arching and noise. Maybe if used wire type auto cables its better.
Have now got the original harness rewired with wire style cables by M-14P.
Mounted new caps and breaker points. Have flown great last 50 flight hrs.
Last weekend flying 8 tours. Last tour ended with the classic coil problem. Got
missfire After airbourne. Did check all the plugs(now original) with pressure
tester. Found 4 to be not good, replaced them with new and made a test flight
but same issue when airbourne. Know i had to take mag check airbourne to get
it to missfire. When runnend on both it was pretty nice, but not perfect so did
take the mag check and pointed on no2 it missfire like hell
Br
Havard
Sendt fra min iPad
> Den 6. mar. 2016 kl. 11.48 skrev Richard Goode <richard.goode@russianaeros.com>:
>
>
> Hello Havard,
>
> I'm curious as to why you seem to be unhappy with the automotive plug
> conversion kit. I suspect there are over 300 (Dennis you probably have
an
> accurate figure) in use around the world, and I've never heard of anyone,
> until you, who is not absolutely delighted with them. My personal view
is
> that they are the best thing you can do for these engines for the money!
>
> Richard Goode Aerobatics
> Rhodds Farm
> Lyonshall
> Hereford
> HR5 3LW
>
> Tel: +44 (0) 1544 340120 <tel:%2B44%20%280%29%201544%20340120>
> Fax: +44 (0) 1544 340129 <tel:%2B44%20%280%29%201544%20340129>
> www.russianaeros.com
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Hvard Dale
> Sent: 06 March 2016 09:15
> To: yak-list@matronics.com
> Subject: Yak-List: Champion spark plug
>
> --> <yaknorway52@gmail.com>
>
> Anyone have experience's with champion spark plug RVL 38S on the M-14p?
>
> Ps: Auto ignition kit is not in the question, or an option for saving
cash.
> Have a KIT for sale if anyone would like that.
>
> Br
> Havard
> Yak Norway
>
> http://m.aircraftspruce.com/catalog/eppages/champsprkplugs20.php
>
> Sendt fra min iPhone
>
>>> Den 6. mar. 2016 kl. 09.03 skrev Yak-List Digest Server
>> <yak-list@matronics.com>:
>>
>> *
>>
>> ========================
>> Online Versions of Today's List Digest Archive
>> ========================
>>
>> Today's complete Yak-List Digest can also be found in either of the
>> two Web Links listed below. The .html file includes the Digest
>> formatted in HTML for viewing with a web browser and features
>> Hyperlinked Indexes and Message Navigation. The .txt file includes
>> the plain ASCII version of the Yak-List Digest and can be viewed with
>> a generic text editor such as Notepad or with a web browser.
>>
>> HTML Version:
>>
>>
>> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&C
>> hapter 16-03-05&Archive=Yak
>>
>> Text Version:
>>
>>
>> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Ch
>> apter 16-03-05&Archive=Yak
>>
>>
>> ======================
>> EMail Version of Today's List Digest Archive
>> ======================
>>
>>
>> ----------------------------------------------------------
>> Yak-List Digest Archive
>> ---
>> Total Messages Posted Sat 03/05/16: 1
>> ----------------------------------------------------------
>>
>>
>> Today's Message Index:
>> ----------------------
>>
>> 1. 01:21 PM - Re: I'm Looking for an M14P (danbooker)
>>
>>
>>
>> ________________________________ Message 1
>> _____________________________________
>>
>>
>> Time: 01:21:53 PM PST US
>> Subject: Yak-List: Re: I'm Looking for an M14P
>> From: "danbooker" <danbooker@hotmail.com>
>>
>>
>> You still looking for an engine? Getting ready to swap mine. It's
>> running great, but I got a factory new one in a crate I want to
>> install before it gets old and corrodes!
>>
>> --------
>> Daniel Booker
>> "Stealth-Eagle Aviation"
>> 2312457798
>> danbooker@hotmail.com
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=453442#453442
>
>
>
>
>
>
> --
> This message has been scanned for viruses and dangerous content by
> MailScanner, and is believed to be c http:/ -Mattk-List" target="_blank">http://www.matronics.com/Navigator?Yak-List <http://www.matronics.com/contribution> http://forums.mat &nbs//www.matronics.com/contribution" target="_blank">http://www.matronics.co=================
Message 12
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Auto wiring issues |
Absolutely correct. And a lot of folks gap these automotive plugs at automotive
gaps ... such as .035
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Cpayne
Sent: Monday, March 07, 2016 7:17 AM
Subject: [Non-DoD Source] Yak-List: Auto wiring issues
In my experience, problems with auto wire conversions can be traced to installation
errors or not properly gaping the auto plugs. Anything more than .020" gap
will cause excessive resistance and load on magneto coils, especially at altitude.
This leads to misfiring, arcing in the distributor cap and mag coil damage.
Craig Payne
Message 13
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Champion spark plug |
This is an extremely well written explanation.
Nice job Hans.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
Sent: Monday, March 07, 2016 7:27 AM
Subject: [Non-DoD Source] Re: Yak-List: Re: Champion spark plug
Chris and all,
I am using the automotive kit already for the last 6 years or so on my Yak52 and
have no problems with it.
The radio I have been using until last year was a Becker 4201. Since august last
year I have a new radio because of the necessity for us in Europe to change
to 8.33 channel separation. This new radio is a Becker 6201. Pin
compatible(almost) with the 4201. Intercom is a PS Engineering PM1000.
Measurements I have done showed that the noise generated by the automotive ignition
kit is less than the original one. I have no noise whatsoever on my radio
and/or intercom.
You are talking about interference. With all do respect it has nothing to do with
interference but solely with the proper installation of the intercom and the
radio. From a electrical noise point of view the Yak by definition is a terrible
environment. DC generator, mechanical DC regulator, tacho generator etc.
In general noise enters a radio through the antenna.
When the noise enters the radio through the power supply it can be solved easily
by means of a filter which is readily available from Spruce. In your case whereby
you have noise on the intercom it can be solved satisfactory by means of
the use of a power filter on intercom's power input.
So what can be do more?
It all has to do with proper installation of the intercom and the radio.
Nowadays the modern radio's we use have digital IF and are less sensitive for noise.
They are well designed and the majority have DSP noise suppression.
In order to find out whether noise is coming in the radio through the antenna the
best thing to do is to unscrew the antenna from the radio and short circuit
the connector(mostly a BNC). DO NOT PUSH THE PTT AT THIS POINT BECAUSE YOU WILL
PROBABLY BLOW UP THE FINAL AMPLIFIER OF THE TRANSMITTER.
If the noise is still there it will for almost certainly come into the radio through
the power supply. In that case install a powersupply noise suppressor filter
and a capacitor on the "plus" coming from the generator.
If the noise comes into the radio through the antenna there is really not a lot
you can do but in all cases my recommendation would be to install noise suppressor
filters on both magnets as well, i.e. on the leads which go to the mag switch.
These wires radiate a lot of noise and this radiated noise can easily be
suppressed by a capacitor. Normally these wires should be shielded but in due
time the shielding may have come loose from earth or are terribly damaged.
Also make sure the radio is installed properly, that means, use the right shielded
cable. Do not connect ground to the shielding on both sides but ONLY connect
the shielding on the radioside. Ensure a good earth.
The problem with noise coming through the antenna is that noise is AM modulated,
which is the same type of modulation of the signals we generate and receive
with our radio. In other words our VHF radio is well equipped to receive this
type of noise. The design of the radio is there for also important. Poorly designed
radio's are much more susceptible to noise than properly designed ones.
In our Yak environment I would go for the bigger names like Becker, Funkwerk, Garmin,
King etc. In this case it is fair to say:the cheaper the radio the more
chances you have for noise problems.
Hope this helps you a little bit.
Hans O.
PH-YAK
Op 07-03-16 06:37, Looigi <cdoburton@gmail.com> schreef:
>
> A friend of mine is also having interference issues since he fitted an
> automotive ignition plug conversion. His Yak 52 doesn't have a radio,
> but the noise is over the standard Russian intercom.
>
> He has changed the magnetos with a known good one but still no better.
>
> Has anyone found a solution to this issue? He doesn't want to go back
> to the old leads and I am going to be fitting a kit to mine once the
> Russian leads die.
>
> Cheers
> Chris
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=453488#453488
>
>
>
>
>
>
>
>
>
>
Message 14
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Auto wiring issues |
In the for "what it is worth" category since by this time everything has already
pretty much been said, I will add my personal experiences anyway. I have followed
the slow upgrade of the ignition system on the M-14 for about the last
15 years.
Havard, original designs on both Russian and American engines sometimes used solid
wire ignition lines running from the mag to the spark plugs. This generated
a TERRIFIC amount of noise and had to be completely shielded. In fact these
solid core wires are actually illegal to use on an automobile in the United
States because of the noise they generate.
There are many problems with this design by the way, foremost of which is cross-fire.
With this design, it is easy for insulation to break down on wires internal
to the tube shield (where you have absolutely no way to see it) and cause
the wrong plug to fire at the wrong time, sometimes in fact with two plugs
firing. It is an ugly problem. When you finally do find a bad wire in this
tube shield, you have to pull it out and get a new one in there. This oftentimes
results in a lot of friction to surrounding wires in the tube actually causing
even MORE problems. This also puts an extreme load on mag coils, causing
them to fail early. But for decades people put up with these problems since
there was no other known solution.
One of the first improvements on the Russian design came when people tried to use
silicone insulated wire to replace the original Russian wire. Why? Because
the Russian wire failed fairly quickly because of the insulating material used.
Then due to the problems with the Russian plugs efforts began to try to figure
out some way to use a standard automobile sparkplug. One of the interesting
features of the Russian plugs was that if one got dropped and you didn't
know about it, it could end up with the center of it blowing out under pressure
... as in the engine running ..... and you had a potential disaster in the engine
compartment. I have YET to see an automotive plug do that.
Finally, there was the Dennis Savarese design. Simple. External high performance
ignition wires feeding standard automobile spark plugs of the proper heat
range. All the above problems just described go away and the engine performance,
idling, tip in, etc., all vastly improve.
Noise.... well Hans Oortman <pa3arw@ziggo.nl> just wrote as good (probably better
actually) posting than I could. But I will add one thing. These spark plug
wires and these spark plugs are installed in more everyday automobiles than
can be counted. All of them have radio receivers. All of them seem to get along
just fine. In my particular case, I have HF, VHF and UHF radios all transmitting
and receiving in my car with no problem at all. I have put a ton of
these kits into MANY M-14 engines and the only radio that gave me real headaches
was the same one you have. That said, after a lot of work with shielding of
just about everything that can be imagined, we finally got acceptable performance
out of it. Not great, but acceptable. Doc Kemp is correct, some radios
from that company used less than great shielding in their I.F. stages and are
extremely sensitive to noise.
I am sorry to say this to you, but going back to the original design on the M-14
ignition system is in my opinion a huge step backwards. I do not doubt the
problems you reported are true, but this is the first time I have heard them reported
on the YAK LIST from you. Maybe I am incorrect. But the fact is that
everything you reported as failing could have been caused by numerous things
installed incorrectly or adjusted incorrectly. This includes the radio installation.
The magneto in this engine is a work of art, and it takes an artist
to adjust it properly.... or a mechanic that truly knows the thing inside out
and how to set it up. This, along with plug gaps, exact radio models, etc.,
can lead to every problem you listed.
I understand that you are happy with your choice, but I do not agree with the view
that others should follow in your footsteps. There are just too many of these
kits out there working PERFECTLY for the kit itself to be at fault.
R/S,
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Hvard Dale
Sent: Monday, March 07, 2016 1:52 PM
Subject: [Non-DoD Source] Re: Yak-List: Auto wiring issues
Most likely its in perfect condition so if anyone wants it? I sell it cheap.
Trade for a kit with new original spark plugs Could be a Good offer:-)
Br
Havard
image1.PNG
Sendt fra min iPhone
Den 7. mar. 2016 kl. 19.34 skrev Cory Robin <crobin@skyvantage.com>:
I can attest, that the auto plug conversion, if installed properly, is a very
worthwhile UPGRADE.
1. Use proper plugs (Resistor type)
2. Is it worth the money for iridium? (I don't know, some say it's not, but I
run them)
3. check and double check with meter all wires all the way into the cap
4. Enjoy a much better and smoother running engine.
Cory
wilgabeast.com
Message 15
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Magneto overhaul |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Message 16
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Champion spark plug |
Thanks Mark! We should meet some day!
I'll be in my home in Daytona the next 2 weeks, Bikeweek 2016....
73's
Hans O.
Op 07-03-16 20:44, Bitterlich, Mark G CIV NAVAIR, WD
<mark.bitterlich@navy.mil> schreef:
> This is an extremely well written explanation.
>
> Nice job Hans.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
> Sent: Monday, March 07, 2016 7:27 AM
> To: yak-list@matronics.com
> Subject: [Non-DoD Source] Re: Yak-List: Re: Champion spark plug
>
>
> Chris and all,
>
> I am using the automotive kit already for the last 6 years or so on my Yak52
> and have no problems with it.
> The radio I have been using until last year was a Becker 4201. Since august
> last year I have a new radio because of the necessity for us in Europe to
> change to 8.33 channel separation. This new radio is a Becker 6201. Pin
> compatible(almost) with the 4201. Intercom is a PS Engineering PM1000.
> Measurements I have done showed that the noise generated by the automotive
> ignition kit is less than the original one. I have no noise whatsoever on my
> radio and/or intercom.
>
> You are talking about interference. With all do respect it has nothing to do
> with interference but solely with the proper installation of the intercom and
> the radio. From a electrical noise point of view the Yak by definition is a
> terrible environment. DC generator, mechanical DC regulator, tacho generator
> etc. In general noise enters a radio through the antenna.
> When the noise enters the radio through the power supply it can be solved
> easily by means of a filter which is readily available from Spruce. In your
> case whereby you have noise on the intercom it can be solved satisfactory by
> means of the use of a power filter on intercom's power input.
>
> So what can be do more?
> It all has to do with proper installation of the intercom and the radio.
> Nowadays the modern radio's we use have digital IF and are less sensitive for
> noise. They are well designed and the majority have DSP noise suppression.
> In order to find out whether noise is coming in the radio through the antenna
> the best thing to do is to unscrew the antenna from the radio and short
> circuit the connector(mostly a BNC). DO NOT PUSH THE PTT AT THIS POINT BECAUSE
> YOU WILL PROBABLY BLOW UP THE FINAL AMPLIFIER OF THE TRANSMITTER.
> If the noise is still there it will for almost certainly come into the radio
> through the power supply. In that case install a powersupply noise suppressor
> filter and a capacitor on the "plus" coming from the generator.
>
> If the noise comes into the radio through the antenna there is really not a
> lot you can do but in all cases my recommendation would be to install noise
> suppressor filters on both magnets as well, i.e. on the leads which go to the
> mag switch. These wires radiate a lot of noise and this radiated noise can
> easily be suppressed by a capacitor. Normally these wires should be shielded
> but in due time the shielding may have come loose from earth or are terribly
> damaged.
>
> Also make sure the radio is installed properly, that means, use the right
> shielded cable. Do not connect ground to the shielding on both sides but ONLY
> connect the shielding on the radioside. Ensure a good earth.
>
> The problem with noise coming through the antenna is that noise is AM
> modulated, which is the same type of modulation of the signals we generate and
> receive with our radio. In other words our VHF radio is well equipped to
> receive this type of noise. The design of the radio is there for also
> important. Poorly designed radio's are much more susceptible to noise than
> properly designed ones.
> In our Yak environment I would go for the bigger names like Becker, Funkwerk,
> Garmin, King etc. In this case it is fair to say:the cheaper the radio the
> more chances you have for noise problems.
>
> Hope this helps you a little bit.
>
> Hans O.
> PH-YAK
>
>
>
>
>
>
> Op 07-03-16 06:37, Looigi <cdoburton@gmail.com> schreef:
>
>>
>> A friend of mine is also having interference issues since he fitted an
>> automotive ignition plug conversion. His Yak 52 doesn't have a radio,
>> but the noise is over the standard Russian intercom.
>>
>> He has changed the magnetos with a known good one but still no better.
>>
>> Has anyone found a solution to this issue? He doesn't want to go back
>> to the old leads and I am going to be fitting a kit to mine once the
>> Russian leads die.
>>
>> Cheers
>> Chris
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=453488#453488
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>
Message 17
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Champion spark plug |
It would be my pleasure Hans! And anyone else on this list as well actually.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
Sent: Monday, March 07, 2016 4:09 PM
Subject: Re: [Non-DoD Source] Re: Yak-List: Re: Champion spark plug
Thanks Mark! We should meet some day!
I'll be in my home in Daytona the next 2 weeks, Bikeweek 2016....
73's
Hans O.
Op 07-03-16 20:44, Bitterlich, Mark G CIV NAVAIR, WD <mark.bitterlich@navy.mil>
schreef:
> This is an extremely well written explanation.
>
> Nice job Hans.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
> Sent: Monday, March 07, 2016 7:27 AM
> To: yak-list@matronics.com
> Subject: [Non-DoD Source] Re: Yak-List: Re: Champion spark plug
>
>
> Chris and all,
>
> I am using the automotive kit already for the last 6 years or so on my
> Yak52 and have no problems with it.
> The radio I have been using until last year was a Becker 4201. Since
> august last year I have a new radio because of the necessity for us in
> Europe to change to 8.33 channel separation. This new radio is a
> Becker 6201. Pin
> compatible(almost) with the 4201. Intercom is a PS Engineering PM1000.
> Measurements I have done showed that the noise generated by the
> automotive ignition kit is less than the original one. I have no noise
> whatsoever on my radio and/or intercom.
>
> You are talking about interference. With all do respect it has nothing
> to do with interference but solely with the proper installation of the
> intercom and the radio. From a electrical noise point of view the Yak
> by definition is a terrible environment. DC generator, mechanical DC
> regulator, tacho generator etc. In general noise enters a radio through the
antenna.
> When the noise enters the radio through the power supply it can be
> solved easily by means of a filter which is readily available from
> Spruce. In your case whereby you have noise on the intercom it can be
> solved satisfactory by means of the use of a power filter on intercom's power
input.
>
> So what can be do more?
> It all has to do with proper installation of the intercom and the radio.
> Nowadays the modern radio's we use have digital IF and are less
> sensitive for noise. They are well designed and the majority have DSP noise suppression.
> In order to find out whether noise is coming in the radio through the
> antenna the best thing to do is to unscrew the antenna from the radio
> and short circuit the connector(mostly a BNC). DO NOT PUSH THE PTT AT
> THIS POINT BECAUSE YOU WILL PROBABLY BLOW UP THE FINAL AMPLIFIER OF THE TRANSMITTER.
> If the noise is still there it will for almost certainly come into the
> radio through the power supply. In that case install a powersupply
> noise suppressor filter and a capacitor on the "plus" coming from the generator.
>
> If the noise comes into the radio through the antenna there is really
> not a lot you can do but in all cases my recommendation would be to
> install noise suppressor filters on both magnets as well, i.e. on the
> leads which go to the mag switch. These wires radiate a lot of noise
> and this radiated noise can easily be suppressed by a capacitor.
> Normally these wires should be shielded but in due time the shielding
> may have come loose from earth or are terribly damaged.
>
> Also make sure the radio is installed properly, that means, use the
> right shielded cable. Do not connect ground to the shielding on both
> sides but ONLY connect the shielding on the radioside. Ensure a good earth.
>
> The problem with noise coming through the antenna is that noise is AM
> modulated, which is the same type of modulation of the signals we
> generate and receive with our radio. In other words our VHF radio is
> well equipped to receive this type of noise. The design of the radio
> is there for also important. Poorly designed radio's are much more
> susceptible to noise than properly designed ones.
> In our Yak environment I would go for the bigger names like Becker,
> Funkwerk, Garmin, King etc. In this case it is fair to say:the cheaper
> the radio the more chances you have for noise problems.
>
> Hope this helps you a little bit.
>
> Hans O.
> PH-YAK
>
>
> Op 07-03-16 06:37, Looigi <cdoburton@gmail.com> schreef:
>
>>
>> A friend of mine is also having interference issues since he fitted
>> an automotive ignition plug conversion. His Yak 52 doesn't have a
>> radio, but the noise is over the standard Russian intercom.
>>
>> He has changed the magnetos with a known good one but still no better.
>>
>> Has anyone found a solution to this issue? He doesn't want to go
>> back to the old leads and I am going to be fitting a kit to mine once
>> the Russian leads die.
>>
>> Cheers
>> Chris
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=453488#453488
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 18
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Auto wiring issues |
Hi Mark/ All
I sure appreciate your effort in explaining the system for me. For sure its
complicated and just a handfull of good mechanics understand it. My self
started questioned my own ability to do propper installation an adjustment
of the mags.
To be honest, the radio noise has been a night mare on my Yak all since two
thing. I had an issue with a blow out of gasket between mixture collector
and crank house. This resulted in a hire of Termikas expert coming to
Norway, removed engine, replaced gasket, installed engine. Same time they
also installed Auto ignition kit. Engine not leaking any oil but radio
noise is a fact. Magnetos was now adjusted by engine mechanic from
Termikas, After some thinking we went on with Magneto filter on the P-lead,
same shit. Next in line, checked antenna connection and replaced cable,
check grounding on antenna, same shit. Then i completely removed all Com
wiring, including PTT, I mean everything out on the concrete. New wiring
created on bench in compliance with wiring diagram on Becker AR4201 and PM
1200 intercom. Installed that and hit the tire and light the fire assuming
noise is gone, but same shit! Then back and forward, understand me correct.
This is not much noise, the noise is only when receiving a signal, its not
a continuous noise. Its like the signal want close so the squelch
adjustment is pretty high in setting resulting in lack of range on
receiving signal. Further on we mistake the Auto kit to be the key point of
noise. Yes engine is running dam good, start is no issue and everything is
good. Have it flown about 50 hrs after installation I decided to rewire the
original harness. Sent that to Jill at M-14P and she replaced all the old
harness( from 2008 Termikas overhaul) And i picked it up at Oshkosh, toke
it home and removed Auto kit and installed the old system. Radio noise
almost gone and engine runs perfectly, with old spark plugs. Last flight I
had issue with misfire on a flight and checked all my old spark plugs in a
Champion tester under pressure. Found 4 plugs to be not so good and
replaced them. Then on next test flight I had almost perfect running but
not all the way so on a mag check airborne the No 2 misfires.
So Yes probably the Auto kit is good stuff but I have decided not to go
with it anymore. Everybody can't do the same thing you now:-)
I have just bought new shielded P-leads and gone re-wire that system now.
Removing the mag selector in rear cockpit and wire it like the 52W.
Hopefully then the small noise left is gone.
Have got quote now for overhauling the magnetos, 650Euro at Motorstar, 900
Euro at Termikas, 950Euro at Aerometal. A friend of me having a couple
M-14P laying in his yard will trade two new (Motorstar) overhauled magnetos
with some parts form me som hopefully I get out of it with not to much cash
out. Also getting a new kit of spark plugs. Then the system should be as
good as it can be, hopefully.
Appreciate all comments on the list and think this is the best thing about
follow you al in here. A lout of experience and help finding good solutions
.
Excuse my english, I am an Norwegian:-)
Best Regards
Havard Dale
LN-HDA
S/N 9111505
Former Pink Floyd David Gilmour Yak 52:-)
Med Vennlig Hilsen
Yak Norway
www.yaknorway.no
yaknorway52@gmail.com
Mobil: +47 952 50 103
Org No:916588054
2016-03-07 21:14 GMT+01:00 Bitterlich, Mark G CIV NAVAIR, WD <
mark.bitterlich@navy.mil>:
> mark.bitterlich@navy.mil>
>
> In the for "what it is worth" category since by this time everything has
> already pretty much been said, I will add my personal experiences anyway.
> I have followed the slow upgrade of the ignition system on the M-14 for
> about the last 15 years.
>
> Havard, original designs on both Russian and American engines sometimes
> used solid wire ignition lines running from the mag to the spark plugs.
> This generated a TERRIFIC amount of noise and had to be completely
> shielded. In fact these solid core wires are actually illegal to use on
an
> automobile in the United States because of the noise they generate.
>
> There are many problems with this design by the way, foremost of which i
s
> cross-fire. With this design, it is easy for insulation to break down on
> wires internal to the tube shield (where you have absolutely no way to se
e
> it) and cause the wrong plug to fire at the wrong time, sometimes in fact
> with two plugs firing. It is an ugly problem. When you finally do find
a
> bad wire in this tube shield, you have to pull it out and get a new one i
n
> there. This oftentimes results in a lot of friction to surrounding wires
> in the tube actually causing even MORE problems. This also puts an extre
me
> load on mag coils, causing them to fail early. But for decades people p
ut
> up with these problems since there was no other known solution.
>
> One of the first improvements on the Russian design came when people trie
d
> to use silicone insulated wire to replace the original Russian wire. Why
?
> Because the Russian wire failed fairly quickly because of the insulating
> material used. Then due to the problems with the Russian plugs efforts
> began to try to figure out some way to use a standard automobile
> sparkplug. One of the interesting features of the Russian plugs was that
> if one got dropped and you didn't know about it, it could end up with the
> center of it blowing out under pressure ... as in the engine running ....
.
> and you had a potential disaster in the engine compartment. I have YET
to
> see an automotive plug do that.
>
> Finally, there was the Dennis Savarese design. Simple. External high
> performance ignition wires feeding standard automobile spark plugs of the
> proper heat range. All the above problems just described go away and the
> engine performance, idling, tip in, etc., all vastly improve.
>
> Noise.... well Hans Oortman <pa3arw@ziggo.nl> just wrote as good
> (probably better actually) posting than I could. But I will add one
> thing. These spark plug wires and these spark plugs are installed in mor
e
> everyday automobiles than can be counted. All of them have radio
> receivers. All of them seem to get along just fine. In my particular
> case, I have HF, VHF and UHF radios all transmitting and receiving in my
> car with no problem at all. I have put a ton of these kits into MANY M-
14
> engines and the only radio that gave me real headaches was the same one y
ou
> have. That said, after a lot of work with shielding of just about
> everything that can be imagined, we finally got acceptable performance ou
t
> of it. Not great, but acceptable. Doc Kemp is correct, some radios from
> that company used less than great shielding in their I.F. stages and are
> extremely sensitive to noise.
>
> I am sorry to say this to you, but going back to the original design on
> the M-14 ignition system is in my opinion a huge step backwards. I do no
t
> doubt the problems you reported are true, but this is the first time I ha
ve
> heard them reported on the YAK LIST from you. Maybe I am incorrect. But
> the fact is that everything you reported as failing could have been cause
d
> by numerous things installed incorrectly or adjusted incorrectly. This
> includes the radio installation. The magneto in this engine is a work o
f
> art, and it takes an artist to adjust it properly.... or a mechanic that
> truly knows the thing inside out and how to set it up. This, along with
> plug gaps, exact radio models, etc., can lead to every problem you listed
.
>
> I understand that you are happy with your choice, but I do not agree with
> the view that others should follow in your footsteps. There are just too
> many of these kits out there working PERFECTLY for the kit itself to be a
t
> fault.
>
> R/S,
>
> Mark Bitterlich
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com [mailto:
> owner-yak-list-server@matronics.com] On Behalf Of H=C3=A5vard Dale
> Sent: Monday, March 07, 2016 1:52 PM
> To: yak-list@matronics.com
> Subject: [Non-DoD Source] Re: Yak-List: Auto wiring issues
>
> Most likely its in perfect condition so if anyone wants it? I sell it
> cheap.
>
> Trade for a kit with new original spark plugs Could be a Good offer:-)
>
> Br
> Havard
>
> image1.PNG
>
> Sendt fra min iPhone
>
> Den 7. mar. 2016 kl. 19.34 skrev Cory Robin <crobin@skyvantage.com>:
>
>
> I can attest, that the auto plug conversion, if installed
> properly, is a very worthwhile UPGRADE.
>
> 1. Use proper plugs (Resistor type)
> 2. Is it worth the money for iridium? (I don't know, some say
> it's not, but I run them)
> 3. check and double check with meter all wires all the way into
> the cap
> 4. Enjoy a much better and smoother running engine.
>
> Cory
>
> wilgabeast.com
>
>
===========
===========
===========
===========
===========
>
>
Message 19
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Auto wiring issues |
Hi,
Here is a video clip of the Radio noise I made almost one year ago. No
difference when disconnecting the USB.
https://vimeo.com/128255370
Med Vennlig Hilsen
Yak Norway
www.yaknorway.no
yaknorway52@gmail.com
Mobil: +47 952 50 103
Org No:916588054
2016-03-07 22:45 GMT+01:00 H=C3=A5vard Dale <yaknorway52@gmail.com>:
> Hi Mark/ All
>
> I sure appreciate your effort in explaining the system for me. For sure
> its complicated and just a handfull of good mechanics understand it. My
> self started questioned my own ability to do propper installation an
> adjustment of the mags.
>
> To be honest, the radio noise has been a night mare on my Yak all since
> two thing. I had an issue with a blow out of gasket between mixture
> collector and crank house. This resulted in a hire of Termikas expert
> coming to Norway, removed engine, replaced gasket, installed engine. Same
> time they also installed Auto ignition kit. Engine not leaking any oil bu
t
> radio noise is a fact. Magnetos was now adjusted by engine mechanic from
> Termikas, After some thinking we went on with Magneto filter on the P-lea
d,
> same shit. Next in line, checked antenna connection and replaced cable,
> check grounding on antenna, same shit. Then i completely removed all Com
> wiring, including PTT, I mean everything out on the concrete. New wiring
> created on bench in compliance with wiring diagram on Becker AR4201 and P
M
> 1200 intercom. Installed that and hit the tire and light the fire assumin
g
> noise is gone, but same shit! Then back and forward, understand me correc
t.
> This is not much noise, the noise is only when receiving a signal, its no
t
> a continuous noise. Its like the signal want close so the squelch
> adjustment is pretty high in setting resulting in lack of range on
> receiving signal. Further on we mistake the Auto kit to be the key point
of
> noise. Yes engine is running dam good, start is no issue and everything i
s
> good. Have it flown about 50 hrs after installation I decided to rewire t
he
> original harness. Sent that to Jill at M-14P and she replaced all the old
> harness( from 2008 Termikas overhaul) And i picked it up at Oshkosh, toke
> it home and removed Auto kit and installed the old system. Radio noise
> almost gone and engine runs perfectly, with old spark plugs. Last flight
I
> had issue with misfire on a flight and checked all my old spark plugs in
a
> Champion tester under pressure. Found 4 plugs to be not so good and
> replaced them. Then on next test flight I had almost perfect running but
> not all the way so on a mag check airborne the No 2 misfires.
>
> So Yes probably the Auto kit is good stuff but I have decided not to go
> with it anymore. Everybody can't do the same thing you now:-)
>
> I have just bought new shielded P-leads and gone re-wire that system now.
> Removing the mag selector in rear cockpit and wire it like the 52W.
> Hopefully then the small noise left is gone.
>
> Have got quote now for overhauling the magnetos, 650Euro at Motorstar, 90
0
> Euro at Termikas, 950Euro at Aerometal. A friend of me having a couple
> M-14P laying in his yard will trade two new (Motorstar) overhauled magnet
os
> with some parts form me som hopefully I get out of it with not to much ca
sh
> out. Also getting a new kit of spark plugs. Then the system should be as
> good as it can be, hopefully.
>
> Appreciate all comments on the list and think this is the best thing abou
t
> follow you al in here. A lout of experience and help finding good solutio
ns.
>
> Excuse my english, I am an Norwegian:-)
>
> Best Regards
>
> Havard Dale
> LN-HDA
> S/N 9111505
> Former Pink Floyd David Gilmour Yak 52:-)
>
> Med Vennlig Hilsen
>
> Yak Norway
> www.yaknorway.no
> yaknorway52@gmail.com
> Mobil: +47 952 50 103
> Org No:916588054
>
>
> 2016-03-07 21:14 GMT+01:00 Bitterlich, Mark G CIV NAVAIR, WD <
> mark.bitterlich@navy.mil>:
>
>> mark.bitterlich@navy.mil>
>>
>> In the for "what it is worth" category since by this time everything has
>> already pretty much been said, I will add my personal experiences anyway
.
>> I have followed the slow upgrade of the ignition system on the M-14 for
>> about the last 15 years.
>>
>> Havard, original designs on both Russian and American engines sometimes
>> used solid wire ignition lines running from the mag to the spark plugs.
>> This generated a TERRIFIC amount of noise and had to be completely
>> shielded. In fact these solid core wires are actually illegal to use on
an
>> automobile in the United States because of the noise they generate.
>>
>> There are many problems with this design by the way, foremost of which
>> is cross-fire. With this design, it is easy for insulation to break dow
n
>> on wires internal to the tube shield (where you have absolutely no way t
o
>> see it) and cause the wrong plug to fire at the wrong time, sometimes in
>> fact with two plugs firing. It is an ugly problem. When you finally d
o
>> find a bad wire in this tube shield, you have to pull it out and get a n
ew
>> one in there. This oftentimes results in a lot of friction to surroundi
ng
>> wires in the tube actually causing even MORE problems. This also puts a
n
>> extreme load on mag coils, causing them to fail early. But for decades
>> people put up with these problems since there was no other known solutio
n.
>>
>> One of the first improvements on the Russian design came when people
>> tried to use silicone insulated wire to replace the original Russian wir
e.
>> Why? Because the Russian wire failed fairly quickly because of the
>> insulating material used. Then due to the problems with the Russian plu
gs
>> efforts began to try to figure out some way to use a standard automobile
>> sparkplug. One of the interesting features of the Russian plugs was tha
t
>> if one got dropped and you didn't know about it, it could end up with th
e
>> center of it blowing out under pressure ... as in the engine running ...
..
>> and you had a potential disaster in the engine compartment. I have YET
to
>> see an automotive plug do that.
>>
>> Finally, there was the Dennis Savarese design. Simple. External high
>> performance ignition wires feeding standard automobile spark plugs of th
e
>> proper heat range. All the above problems just described go away and th
e
>> engine performance, idling, tip in, etc., all vastly improve.
>>
>> Noise.... well Hans Oortman <pa3arw@ziggo.nl> just wrote as good
>> (probably better actually) posting than I could. But I will add one
>> thing. These spark plug wires and these spark plugs are installed in mo
re
>> everyday automobiles than can be counted. All of them have radio
>> receivers. All of them seem to get along just fine. In my particular
>> case, I have HF, VHF and UHF radios all transmitting and receiving in my
>> car with no problem at all. I have put a ton of these kits into MANY M
-14
>> engines and the only radio that gave me real headaches was the same one
you
>> have. That said, after a lot of work with shielding of just about
>> everything that can be imagined, we finally got acceptable performance o
ut
>> of it. Not great, but acceptable. Doc Kemp is correct, some radios fro
m
>> that company used less than great shielding in their I.F. stages and are
>> extremely sensitive to noise.
>>
>> I am sorry to say this to you, but going back to the original design on
>> the M-14 ignition system is in my opinion a huge step backwards. I do n
ot
>> doubt the problems you reported are true, but this is the first time I h
ave
>> heard them reported on the YAK LIST from you. Maybe I am incorrect. Bu
t
>> the fact is that everything you reported as failing could have been caus
ed
>> by numerous things installed incorrectly or adjusted incorrectly. This
>> includes the radio installation. The magneto in this engine is a work
of
>> art, and it takes an artist to adjust it properly.... or a mechanic that
>> truly knows the thing inside out and how to set it up. This, along with
>> plug gaps, exact radio models, etc., can lead to every problem you liste
d.
>>
>> I understand that you are happy with your choice, but I do not agree wit
h
>> the view that others should follow in your footsteps. There are just to
o
>> many of these kits out there working PERFECTLY for the kit itself to be
at
>> fault.
>>
>> R/S,
>>
>> Mark Bitterlich
>>
>>
>> -----Original Message-----
>> From: owner-yak-list-server@matronics.com [mailto:
>> owner-yak-list-server@matronics.com] On Behalf Of H=C3=A5vard Dale
>> Sent: Monday, March 07, 2016 1:52 PM
>> To: yak-list@matronics.com
>> Subject: [Non-DoD Source] Re: Yak-List: Auto wiring issues
>>
>> Most likely its in perfect condition so if anyone wants it? I sell it
>> cheap.
>>
>> Trade for a kit with new original spark plugs Could be a Good offer:-)
>>
>> Br
>> Havard
>>
>> image1.PNG
>>
>> Sendt fra min iPhone
>>
>> Den 7. mar. 2016 kl. 19.34 skrev Cory Robin <crobin@skyvantage.com>:
>>
>>
>>
>> I can attest, that the auto plug conversion, if installed
>> properly, is a very worthwhile UPGRADE.
>>
>> 1. Use proper plugs (Resistor type)
>> 2. Is it worth the money for iridium? (I don't know, some say
>> it's not, but I run them)
>> 3. check and double check with meter all wires all the way into
>> the cap
>> 4. Enjoy a much better and smoother running engine.
>>
>> Cory
>>
>> wilgabeast.com
>>
>>
>>
===========
===========
===========
===========
===========
>>
>>
>>
>>
>
Message 20
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Auto plug conversion |
One item no one has brought out was the poor decision years ago to stick
with AM radio for aircraft, AM is subject to pulse type interference
and these aircraft are huge generators of that. Also poor radio
installation wiring is also a major problem, follow the directions
provided by the manufacture not the cheapest way. I can't believe some
of the trash that I have seen.
Frank
Message 21
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Auto plug conversion |
There=B9s a good reason why AM is still used for VHF communication in
aviation: smaller bandwidth.
With FM modulation you have many more side bands (infinitely many,
mathematically: the signal can be developed with Bessel functions of the
first kind).
If you have a modulation index of 2 (that means: the frequency sweep on the
FM signal is twice the angular speed of the modulating signal) then you hav
e
at least three side bands on both sides of the carrier, as a rule of fist.
With AM on VHF you get more noise because the noise sits primarily on the
amplitude, and that=B9s exactly what your AM demodulator is detecting.
J.
From: <owner-yak-list-server@matronics.com> on behalf of Frank Stelwagon
<pfstelwagon@earthlink.net>
Subject: Yak-List: Auto plug conversion
One item no one has brought out was the poor decision years ago to stick
with AM radio for aircraft, AM is subject to pulse type interference and
these aircraft are huge generators of that. Also poor radio installation
wiring is also a major problem, follow the directions provided by the
manufacture not the cheapest way. I can't believe some of the trash that I
have seen.
Frank
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|