---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 10/06/08: 11 ---------------------------------------------------------- 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 _____________________________________ Time: 05:48:49 AM PST US From: "Roger Kemp MD" Subject: RE: Yak-List: 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 _____________________________________ Time: 06:27:03 AM PST US From: "doug sapp" Subject: Re: Yak-List: 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 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 > > * * > > * * > > ** > > ** > > ** > > ** > > ** > > ** > > *http://www.matronics.com/Navigator?Yak-List* > > ** > > ** > > ** > > *http://forums.matronics.com* > > ** > > ** > > ** > > ** > > *http://www.matronics.com/contribution* > > ** > > * * > > * > > * > > -- Always Yakin, Doug Sapp Phone 509-826-4610 Fax 509-826-3644 ________________________________ Message 3 _____________________________________ Time: 11:55:29 AM PST US Subject: Yak-List: Yak : [ Matt Salkeld ] : New Email List PhotoShare Available! From: Email List PhotoShares (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 Lists: Yak-List Subject: CJ-6A Tag http://www.matronics.com/photoshare/msalkeld@hotmail.com.10.06.2008 ---------------------------------------------------------- o Main PhotoShare Index http://www.matronics.com/photoshare o Submitting a PhotoShare If you wish to submit a PhotoShare of your own, please include the following information along with your email message and files: 1) Email List or Lists that they are related to: 2) Your Full Name: 3) Your Email Address: 4) One line Subject description: 5) Multi-line, multi-paragraph description of topic: 6) One-line Description of each photo or file: Email the information above and your files and photos to: pictures@matronics.com ---------------------------------------------------------- ________________________________ Message 4 _____________________________________ Time: 12:03:34 PM PST US Subject: Yak-List: Yak : [ Mark Schrick ] : New Email List PhotoShare Available! From: Email List PhotoShares (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 Lists: Yak-List Subject: Yak 50s over South County Airport http://www.matronics.com/photoshare/schrick@pacbell.net.10.06.2008 ---------------------------------------------------------- o Main PhotoShare Index http://www.matronics.com/photoshare o Submitting a PhotoShare If you wish to submit a PhotoShare of your own, please include the following information along with your email message and files: 1) Email List or Lists that they are related to: 2) Your Full Name: 3) Your Email Address: 4) One line Subject description: 5) Multi-line, multi-paragraph description of topic: 6) One-line Description of each photo or file: Email the information above and your files and photos to: pictures@matronics.com ---------------------------------------------------------- ________________________________ Message 5 _____________________________________ Time: 01:37:43 PM PST US Subject: Yak-List: Yak : [ Jerome van der Schaar ] : New Email List PhotoShare Available! From: Email List PhotoShares (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 Lists: Yak-List Subject: Yakkes Foundation Having Fun http://www.matronics.com/photoshare/jvds30@hotmail.com.10.06.2008 ---------------------------------------------------------- o Main PhotoShare Index http://www.matronics.com/photoshare o Submitting a PhotoShare If you wish to submit a PhotoShare of your own, please include the following information along with your email message and files: 1) Email List or Lists that they are related to: 2) Your Full Name: 3) Your Email Address: 4) One line Subject description: 5) Multi-line, multi-paragraph description of topic: 6) One-line Description of each photo or file: Email the information above and your files and photos to: pictures@matronics.com ---------------------------------------------------------- ________________________________ Message 6 _____________________________________ Time: 03:22:54 PM PST US Subject: Yak-List: cht gage canon plug question From: "strawnski" 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 _____________________________________ Time: 04:25:03 PM PST US From: cjpilot710@AOL.COM Subject: Yak-List: 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. Dining, Movies, Events, News & more. Try it out! (http://local.mapquest.com/?ncid=emlcntnew00000001) ________________________________ Message 8 _____________________________________ Time: 04:56:25 PM PST US From: "doug sapp" Subject: Re: Yak-List: 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 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 _____________________________________ Time: 05:48:11 PM PST US From: "Tom Johnson" Subject: Yak-List: 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: www.airpowerinsurance.com * Privacy Information ** NO insurance can be started or changed by email until confirmed in writing. ________________________________ Message 10 ____________________________________ Time: 08:21:49 PM PST US From: ByronMFox@aol.com Subject: Re: Yak-List: 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 ************** New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, N ews & more. Try it out! (http://local.mapquest.com/?ncid=emlcntnew00000001) ________________________________ Message 11 ____________________________________ Time: 08:29:15 PM PST US Subject: Yak-List: Re: RED ALERT - Safety Review From: "tjyak50" 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.