Today's Message Index:
----------------------
1. 04:57 AM - Re: Shielded wiring (vvkidd@mindspring.com)
2. 10:29 AM - Re: Shielded wiring (AZFlyer)
3. 10:56 AM - Re: Shielded wiring (John Loram)
4. 01:36 PM - Re: Shielded wiring (Michael Daniels)
5. 06:11 PM - Re: Shielded wiring (Noel Loveys)
6. 06:49 PM - Re: Shielded wiring (Noel Loveys)
7. 09:21 PM - 3300 - low oil pressure at high RPM (SteveR)
8. 10:34 PM - Re: 3300 - low oil pressure at high RPM (Roger Lee)
9. 10:36 PM - Re: 3300 - low oil pressure at high RPM (Rob Turk)
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: | Re: Shielded wiring |
Try this.
Victor Kidd
Charleston, WV, CRW
N922VK
-----Original Message-----
>From: AZFlyer <millrML@aol.com>
>Sent: Sep 19, 2010 3:20 PM
>To: jabiruengine-list@matronics.com
>Subject: JabiruEngine-List: Shielded wiring
>
>
>List,
>
>As I am major wiring challenged, I'm reading all the "experts" on getting my 3300
wired. There seems to be one school of thought on "Shielded wiring" that
says..." ground both ends" and another school says only "ground the source end."
or risk a Ground Loop (whatever that is?)
>
>source: Bingelis, Greg Richter, AeroElectric
>
>I haven't located that book " Wiring for Dummies" so, any help would be appreciated...
>
>Thanks,
>Mike
>
>--------
>Mike Miller @ millrml@aol.com
>601 XL-B, 3300, Dynon
>
>Remember, "the second mouse gets the cheese"!
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=312943#312943
>
>
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: Shielded wiring |
Victor,
Thanks...already have that reference.
Mike
--------
Mike Miller @ millrml@aol.com
601 XL-B, 3300, Dynon
Remember, "the second mouse gets the cheese"!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=313069#313069
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 |
|
A later version is here:
http://www.eaa.org/experimenter/articles/0903_aircraft_wiring.pdf
-john-
-
> -----Original Message-----
> From: owner-jabiruengine-list-server@matronics.com
> [mailto:owner-jabiruengine-list-server@matronics.com] On
> Behalf Of vvkidd@mindspring.com
> Sent: Monday, September 20, 2010 4:21 AM
> To: jabiruengine-list@matronics.com
> Subject: Re: JabiruEngine-List: Shielded wiring
>
>
> Try this.
>
> Victor Kidd
> Charleston, WV, CRW
> N922VK
> -----Original Message-----
> >From: AZFlyer <millrML@aol.com>
> >Sent: Sep 19, 2010 3:20 PM
> >To: jabiruengine-list@matronics.com
> >Subject: JabiruEngine-List: Shielded wiring
> >
> >
> >List,
> >
> >As I am major wiring challenged, I'm reading all the
> "experts" on getting my 3300 wired. There seems to be one
> school of thought on "Shielded wiring" that says..." ground
> both ends" and another school says only "ground the source
> end." or risk a Ground Loop (whatever that is?)
> >
> >source: Bingelis, Greg Richter, AeroElectric
> >
> >I haven't located that book " Wiring for Dummies" so, any
> help would be appreciated...
> >
> >Thanks,
> >Mike
> >
> >--------
> >Mike Miller @ millrml@aol.com
> >601 XL-B, 3300, Dynon
> >
> >Remember, "the second mouse gets the cheese"!
> >
> >
> >
> >
> >Read this topic online here:
> >
> >http://forums.matronics.com/viewtopic.php?p=312943#312943
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
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: Shielded wiring |
Thanks Victor & John,
I'm a long ways from doing much wiring but sure these pdfs will be helpful
when I get there.
Thanks again,
Mike
--
Mike Daniels,
Twitter: Mike_Flys
Mytransponder: MJD
Podcast: http://www.milehighflyers.com
My airplane build site: http://www.mykitlog.com/buells2t/
YouTube: http://www.youtube.com/buells2t
http://mike-daniels.blogspot.com
On Mon, Sep 20, 2010 at 10:54 AM, John Loram <johnl@loram.org> wrote:
>
> A later version is here:
>
> http://www.eaa.org/experimenter/articles/0903_aircraft_wiring.pdf
>
> -john-
> -
>
> > -----Original Message-----
> > From: owner-jabiruengine-list-server@matronics.com
> > [mailto:owner-jabiruengine-list-server@matronics.com] On
> > Behalf Of vvkidd@mindspring.com
> > Sent: Monday, September 20, 2010 4:21 AM
> > To: jabiruengine-list@matronics.com
> > Subject: Re: JabiruEngine-List: Shielded wiring
> >
> >
> > Try this.
> >
> > Victor Kidd
> > Charleston, WV, CRW
> > N922VK
> > -----Original Message-----
> > >From: AZFlyer <millrML@aol.com>
> > >Sent: Sep 19, 2010 3:20 PM
> > >To: jabiruengine-list@matronics.com
> > >Subject: JabiruEngine-List: Shielded wiring
> > >
> >
>
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 |
|
Grounding at both ends turns the shielded wire into a capacitive inductor.
Grounding at one end only, usually the end which is closest to the source of
the power. Grounding at one end allows spikes and RFI to be sent to ground
efficiently.
Noel
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of AZFlyer
Sent: September 19, 2010 4:51 PM
Subject: JabiruEngine-List: Shielded wiring
List,
As I am major wiring challenged, I'm reading all the "experts" on getting my
3300 wired. There seems to be one school of thought on "Shielded wiring"
that says..." ground both ends" and another school says only "ground the
source end." or risk a Ground Loop (whatever that is?)
source: Bingelis, Greg Richter, AeroElectric
I haven't located that book " Wiring for Dummies" so, any help would be
appreciated...
Thanks,
Mike
--------
Mike Miller @ millrml@aol.com
601 XL-B, 3300, Dynon
Remember, "the second mouse gets the cheese"!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=312943#312943
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 |
|
#1 most important. To emphasize what Barry has written even if you take it
off it may still look clean but may not be. So be sure to clean it
vigorously. One thing though if you have to clean aluminium don't use steel
wool, aluminium oxide paper is safe to clean aluminium. Shards of steel or
iron will imbed itself into aluminium and cause corrosion in the aluminium.
#2 Full agreement if in doubt ground it out!
#3 Again full agreement but the shielding is to protect from outside
interference.
#4 The only RF circuits that should be grounded at both ends are Coaxial
connections. Of course coax is used almost entirely for RF transmissions.
Again the ground braid needs to be clean!
#5 Again I'm in total agreement with Barry but... Sometimes alternator
squeal will penetrate the front end of your radios. In that case you will
need a choke on the input to the radio to filter out the squeal. A choke is
a circuit that comprises a capacitor and a coil of wire. The good news is
they are readily available at auto parts shops.
Not often I agree with everything a person says but this is really one of
the exceptions that makes the rule... Well written Barry.
Noel
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of FLYaDIVE
Sent: September 19, 2010 9:17 PM
Subject: Re: JabiruEngine-List: Shielded wiring
Mike:
Here are the RULES for Grounds and Shielding:
1 - GROUNDS - You can't inspect a ground by looking at it... YOU HAVE TO
REMOVE IT... And while it is off clean CLEAN the contacts and replace the
star washers..
2 - GROUNDS - The more the merrier. It took a LONG time but even Bob
Nicholes FINALLY caught on and NOW SELLS multi ground point blocks. I use
to frequent his web site/email list and pounded my case for about a year.
But old wives tails die hard.
3 - GROUNDS - Ground Loops do NOT occur at DC. They are a High Frequency
occurrence - High Frequency is in the RF Range (RF = Radio Frequency -
Transmittable Frequencies)(Not Audio Frequencies... AF). AND I still have a
challenge out that NO ONE has met. MAKE ME A GROUND LOOP DC CIRCUIT!
4 - SHIELDING - Or in this case: What End of a Shield To Ground?
RF circuits you shield at BOTH ENDS. And lets consider RF as only the
frequencies we see in out planes... VHF.
I know, I know, we all have GPS and they are at microwave frequencies. BUT!
You are not building the units or the antennas, just installing them.
5 - SHIELDING - When you consider things such as Alternator Noise... The
noise is in the audio frequency range and the source is the alternator so
you ground at the source/alternator.
NOW! What happens went the alternator wires reach the ACU/VR (Alternator
Control Unit/Voltage Regulator) and then go out to other locations (ALT
Switch)? Well there the rule stating says ground the source, but what is
the source?
The ACU/VR is the source, But it is already Grounded, usually to the
firewall. SOooooo what do you do with the SHIELD?
You play Electrical Engineer... Not on TV but on your plane. Start with
grounding at the ACU/VR.
But, think ahead and plan ahead. Make a Ground point at the ALT Switch and
put a ring lug on the shield. If you find ALT Noise try grounding at the
ground point you made with the shield near (as close as possible) the ALT
Switch.
It is a GOOD idea to make Ring Lug Grounds on both ends of the shield just
in case the noise did not go to the same school as the electrons. YET! In
all honesty I have never found that to be the case.
6 - Don't forget to install a Capacitor on the OUTPUT of the Alternator B+.
All the shielding in the world won't do dittily if the noise is traveling
out and down your B+.
Barry
On Sun, Sep 19, 2010 at 3:20 PM, AZFlyer <millrML@aol.com> wrote:
List,
As I am major wiring challenged, I'm reading all the "experts" on getting my
3300 wired. There seems to be one school of thought on "Shielded wiring"
that says..." ground both ends" and another school says only "ground the
source end." or risk a Ground Loop (whatever that is?)
source: Bingelis, Greg Richter, AeroElectric
I haven't located that book " Wiring for Dummies" so, any help would be
appreciated...
Thanks,
Mike
--------
Mike Miller @ millrml@aol.com
601 XL-B, 3300, Dynon
Remember, "the second mouse gets the cheese"!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=312943#312943
==========
-List" target="_blank">http://www.matronics.com/Navigator?JabiruEngine-List
==========
http://forums.matronics.com
==========
le, List Admin.
="_blank">http://www.matronics.com/contribution
==========
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: | 3300 - low oil pressure at high RPM |
A friend of mine just bought an Arion Lightning LSA with the 3300 engine. At cruise
RPM, the oil pressure is fine, maybe 45 PSI. At idle it is fine, but I'm
not sure what PSI he told me. The problem is at wide open throttle, during
takeoff the oil pressure will drop to about 30 PSI, and at WOT in cruise flight
the oil pressure drops to about 30 PSI.
What could be the problem? He added a washer to the pressure relief valve today
after changing the oil but experienced the same problem in a ground run.
Any input would be appreciated.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=313171#313171
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: 3300 - low oil pressure at high RPM |
The resistor type senders are very sensitive to partial grounds. We have the same
issues on a FD CT. Fix the grounds to be more solid. Oil pressure senders are
the first to show this because they are more sensitive than other instruments
to poor grounds. Been there and done that on at least 15+ planes.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=313176#313176
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: 3300 - low oil pressure at high RPM |
Steve,
I am translating your message and replacing the values you gave with the
range on the oil pressure gauge:
"A friend of mine just bought an Arion Lightning LSA with the 3300 engine.
At cruise RPM, the oil pressure is fine, in the green. At idle it is fine,
but I'm not sure what PSI he told me. The problem is at wide open throttle,
during takeoff the oil pressure will drop a bit but stays in the green, and
at WOT in cruise flight the oil pressure drops but stays in the green".
Unless your engine is an older one where the oil pump plate has not been
modified for cavitation, there is no problem.
Oh, and the washer does nothing. The relief valve opens at a high pressure
which you do not reach. Adding a washer will only raise the pressure at
which the relief valve opens, it does nothing for normal range operation.
Rob
----- Original Message -----
From: "SteveR" <steve@wotelectronics.com>
Sent: Tuesday, September 21, 2010 6:18 AM
Subject: JabiruEngine-List: 3300 - low oil pressure at high RPM
> <steve@wotelectronics.com>
>
> A friend of mine just bought an Arion Lightning LSA with the 3300 engine.
> At cruise RPM, the oil pressure is fine, maybe 45 PSI. At idle it is
> fine, but I'm not sure what PSI he told me. The problem is at wide open
> throttle, during takeoff the oil pressure will drop to about 30 PSI, and
> at WOT in cruise flight the oil pressure drops to about 30 PSI.
>
> What could be the problem? He added a washer to the pressure relief valve
> today after changing the oil but experienced the same problem in a ground
> run.
>
> Any input would be appreciated.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=313171#313171
>
>
>
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! --
|