Today's Message Index:
----------------------
1. 05:48 AM - Re: Yak CHT Thermocouple (Roger Kemp MD)
2. 06:27 AM - Re: Yak CHT Thermocouple (doug sapp)
3. 11:55 AM - Yak : [ Matt Salkeld ] : New Email List PhotoShare Available! (Email List PhotoShares)
4. 12:03 PM - Yak : [ Mark Schrick ] : New Email List PhotoShare Available! (Email List PhotoShares)
5. 01:37 PM - Yak : [ Jerome van der Schaar ] : New Email List PhotoShare Available! (Email List PhotoShares)
6. 03:22 PM - cht gage canon plug question (strawnski)
7. 04:25 PM - Corrosion Alert CJ-6 (cjpilot710@AOL.COM)
8. 04:56 PM - Re: cht gage canon plug question (doug sapp)
9. 05:48 PM - RED ALERT - Safety Review (Tom Johnson)
10. 08:21 PM - Re: RED ALERT - Safety Review (ByronMFox@aol.com)
11. 08:29 PM - Re: RED ALERT - Safety Review (tjyak50)
Message 1
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| Subject: | Yak CHT Thermocouple |
It looks like a copper washer to me. Dennis can be more definitive than I.
Doc
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Scott Glaser
Sent: Sunday, October 05, 2008 8:52 PM
Subject: Yak-List: Yak CHT Thermocouple
Anyone know what type thermocouple is used for the M-14 CHT sensor in a
Yak-52?
Scott
N8252
Message 2
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| Subject: | Re: Yak CHT Thermocouple |
I have them in stock, contact me off list @ 509-826-4610 or via email.
Always Yakin,
Doug
On Mon, Oct 6, 2008 at 5:47 AM, Roger Kemp MD <viperdoc@mindspring.com>wrote:
> It looks like a copper washer to me. Dennis can be more definitive than
> I.
>
> Doc
>
>
> *From:* owner-yak-list-server@matronics.com [mailto:
> owner-yak-list-server@matronics.com] *On Behalf Of *Scott Glaser
> *Sent:* Sunday, October 05, 2008 8:52 PM
> *To:* yak-list@matronics.com
> *Subject:* Yak-List: Yak CHT Thermocouple
>
>
> Anyone know what type thermocouple is used for the M-14 CHT sensor in a
> Yak-52?
>
>
> Scott
>
> N8252
>
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Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 3
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| Subject: | Yak : [ Matt Salkeld ] : New Email List PhotoShare Available! |
(Listers - Sorry for the delay in processing this Photoshare; all of the incoming
Photoshares where getting caught by my email client's spam filter. I wondered
why nobody had posted a Photoshare in a long while... I've fixed the filter
and Photoshares should be
processed in a normal period of time now. -Matt)
A new Email List PhotoShare is available:
Poster: Matt Salkeld <msalkeld@hotmail.com>
Lists: Yak-List
Subject: CJ-6A Tag
http://www.matronics.com/photoshare/msalkeld@hotmail.com.10.06.2008
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Message 4
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| Subject: | Yak : [ Mark Schrick ] : New Email List PhotoShare Available! |
(Listers - Sorry for the delay in processing this Photoshare; all of the incoming
Photoshares where getting caught by my email client's spam filter. I wondered
why nobody had posted a Photoshare in a long while... I've fixed the filter
and Photoshares should be processed in a normal period of time now. -Matt)
A new Email List PhotoShare is available:
Poster: Mark Schrick <schrick@pacbell.net>
Lists: Yak-List
Subject: Yak 50s over South County Airport
http://www.matronics.com/photoshare/schrick@pacbell.net.10.06.2008
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Message 5
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| Subject: | Yak : [ Jerome van der Schaar ] : New Email List PhotoShare |
Available!
(Listers - Sorry for the delay in processing this Photoshare; all of the incoming
Photoshares where getting caught by my email client's spam filter. I wondered
why nobody had posted a Photoshare in a long while... I've fixed the filter
and Photoshares should be processed in a normal period of time now. -Matt)
A new Email List PhotoShare is available:
Poster: Jerome van der Schaar <jvds30@hotmail.com>
Lists: Yak-List
Subject: Yakkes Foundation Having Fun
http://www.matronics.com/photoshare/jvds30@hotmail.com.10.06.2008
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o Submitting a PhotoShare
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following information along with your email message and files:
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Message 6
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| Subject: | cht gage canon plug question |
Does anyone know the resistance of that filament/line wrapped around the canon
plug that screws into the back of the CHT gage? Or better yet, what exactly that
line is? I accidentally removed that "string" when I disassembled the plug
and went to solder a detached lead. Haven't been able to get an accurate cht
reading.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 7644#207644
Message 7
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| Subject: | Corrosion Alert CJ-6 |
Troops,
At OSH this year, during the multitude of conversations, chit chats, and
just plain eavesdropping, I heard the word "corrosion" in the same sentence with
"CJ-6". Of course my ears perked up. I've done a little research and
looked into several of the stories. Thanks to Doug Sapp's pretty wife Katherine,
providing me with some phone numbers, and the miracle of e-mail, I've come up
with enough to suggest that we CJ-6 owners, take time, soon, and do a
detailed inspection of our wings. So far 4 CJ-6 (2 in the US & 2 in NZ) have
had
significant spar cap corrosion.
The two here in the US were inter granular corrosion of the lower spar cap.
One, the corrosion spots was located in the center section, in the other,
the corrosion was in the left wing just out board of the landing light.
According to my source in NZ Jay McIntyre, those aircraft there, suffered heavy
surface corrosion due to very poor storage for a numbers of years.
I've included Jay's e-mail here.
______________________________________________________________________________
___
Hi Jim.
This particular machine #1832041 is a 1966 build.
It was brought into Australia with another 17 machines in the early 90's.
Due to shady dealings and the vendors wanting exorbitant prices they did not
sell. Eventually the company went bust and after many years they were all sold
at auction in the late 90's.
Unfortunately they were stored in their shipping cradles on the ground and
long grass grew up around them resulting in the problem we now see. A lot of
other damage occurred.
The corrosion is not inter granular, but has resulted from moisture pooling
in the lower center section area, particularly the lower spar caps. This was
initially ground out (see photos), but was way too deep. Many of the wing
attach fittings also suffered a similar fate, with the worst one being the item
I am trying to source from Jeff (see photo).
One other machine from this batch suffered similar problems and I believe
that it has had the spar caps changed. Using the tensile test that the Aussie's
had carried out and our own testing it was determined that the material was
almost identical to 7075-T 6.
A suitable extrusion was procured but required machining (as the original is
not quite a right angle) to achieve the 87 degree angle of the cap. It also
required a small amount of wheeling to induce the slight anhedral of the
center section.
After having it anodized and primed we have just finished installing it.
The center section belly skins were also very corroded and have been
replaced.
Hope this is of help... I will forward another e-mail with some pictures.
Cheers, Jay
_________________________________________________________
Here is a picture of what Jeff Boulware sent me of the damage he found in
his aircraft.
Again this damage on this particular aircraft is located in the bay just out
board of the landing light. The corrosion is on the lower spar cap. The
yellow object behind the lighting holes in the spar web, is the left main fuel
tank. The tube in the picture carries wring going to the wing tip and flux
gate compass. Because of this and other damage (see below) he replaced the
wing.
Below is the corrosion located on the lower spar cap in the center section
of Sean Carroll's aircraft.
This next picture is again from Jay Boulware's aircraft. Though not related
to the corrosion, it does show what other damage could be found during a
really good inspection.
I am not a metallurgist but I've been told that inter granular corrosion is
caused by improper quenching of the metal as it comes from the extrusion
machine. We found this a few times on some of the propellers from China. It
is
not unusual to find it on US aircraft also. I just got though replacing the
spar caps on an Aerocoup with the same problem. No amount of "Corrosion X,"
anodization, or zinc chromate will stop it. It is a manufacturing defect.
I think it behooves us CJ-6 owners to do some detail inspections at this
time. We need to find the extent of the problem and work up the fixes where
needed. If this was an STC'd aircraft, the feds would be rushing out AD notes.
We have to be getting at this on our own. We do not need wings coming off
our aircraft.
My inspection starts before my next flight in N21710.
Jim "Pappy" Goolsby
**************New MapQuest Local shows what's happening at your destination.
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Message 8
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| Subject: | Re: cht gage canon plug question |
Not a clue as to the resistance, but in my last load of parts from China
were seven factory new CHT leads of the CJ6, they are 7 feet long have the
cannon plug on one end and the two (staggered) connectors with screws for
the CHT probe on the other end. Hand engraved on each the connectors is
9.66, rather this is the resistance value I do not know. I do have the
matching CHT probes for these leads.
Always Yakin,
Doug
On Mon, Oct 6, 2008 at 3:22 PM, strawnski <jstrawnsky@msn.com> wrote:
>
> Does anyone know the resistance of that filament/line wrapped around the
> canon plug that screws into the back of the CHT gage? Or better yet, what
> exactly that line is? I accidentally removed that "string" when I
> disassembled the plug and went to solder a detached lead. Haven't been able
> to get an accurate cht reading.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 7644#207644
>
>
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 9
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| Subject: | RED ALERT - Safety Review |
Got my Fall 2008 issue of RPA's Red Alert Magazine today.
I enjoyed reading Alan Cockrell's extensive review of Safety starting on
page 11.
A few comments from my experience on the insurance side:
1) The graph of Total Mishaps on page 11 is daunting: 73 Yak accidents and
26 Nanchangs.
Yak 55, Yak 54 (Competition and Airshow), Yak 3, 7, 9 and 11 (Fighter)
aircraft are included in that 73 total.
The numbers look quite a bit different if you exclude those significantly
different airplanes and operations.
Removing the Airshow for Hire aircraft, along with the Fighters presents a
more meaningful comparison.
Insurance is obviously handled differently for Airshow and big Fighter
airplanes for just this reason.
2) NTSB type statistics unfortunately do not include A LOT of accidents
that never get reported.
Some involve completely destroyed aircraft, some are minor mishaps.
The insurance claims people may or may not get involved in all of these.
3) I noticed a few accidents got double reported.
2 airplanes in a taxi mishap each get an NTSB record that might tend to over
report the history as 2 versus 1 mishap.
4) Jammed Elevators - Way to go RPA! Really turned that situation around.
In fact, why don't we all make a plan to shine a light in the tail cone this
very week and do a "FOD-Check".
5) Landing Gear continues to be the #1 source of damage to RPA type
aircraft.
My Yak has a Landing Gear Warning Buzzer (blares in the intercom)... does
yours? It only cost me a couple hundred bucks.
Yes it goes off once in a while in formation as I retard the power to idle,
but usually only when climbing out with a Cj... :)
Thanks Alan for taking the time to collect all of this data.
Tj
---------------------------
Thomas Johnson, Airpower Insurance, LLC
36 West Ocotillo Road, Phoenix, AZ 85013-1235
Tel: 602-628-2701 or Toll Free: 866-475-9199
E: tomjohnson@cox.net or Fax: 623-321-5843
Free Quote: <http://www.airpowerinsurance.com/> www.airpowerinsurance.com
* Privacy <http://www.airpowerinsurance.com/apower_privacy.pdf>
Information
** NO insurance can be started or changed by email until confirmed in
writing.
Message 10
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| Subject: | Re: RED ALERT - Safety Review |
In a message dated 10/6/08 5:48:48 PM, tomjohnson@cox.net writes:
>
> 5)- Landing Gear continues to be the #1 source of damage to RPA type
> aircraft.
> My Yak has a Landing Gear Warning Buzzer (blares in the intercom)... does
> yours?- It only cost me a couple hundred bucks.
>
Please describe how your gear horn works, Tom, and tell us where it can be
obtained. I assume there's a micro switch on the throttle activated when t
he
gear handle is in the up position. Thanks, Blitz
**************
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ews &
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Message 11
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| Subject: | Re: RED ALERT - Safety Review |
Yessir.
Direct from Aircraft Spruce and Specialty.
Part #: 11-01943
Simple, cheap.
Tj
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 7718#207718
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