---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Tue 01/24/12: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:55 AM - Fw: Dragon Flying...not on my BUCKET LIST (cjpilot710@aol.com) 2. 10:00 AM - Re: Fw: Dragon Flying...not on my BUCKET LIST (Didier Blouzard) 3. 11:44 AM - Tailplane front spar crack (Jacquescj6) 4. 01:37 PM - Re: Tailplane front spar crack (doug sapp) 5. 04:31 PM - Re:Tailplane front spar crack (Cpayne) 6. 06:09 PM - Re: Re:Tailplane front spar crack (doug sapp) 7. 06:47 PM - kenterry (Chris Wise) 8. 07:54 PM - Re: kenterry (cjpilot710@aol.com) 9. 08:34 PM - Re: kenterry (Chris Wise) ________________________________ Message 1 _____________________________________ Time: 08:55:56 AM PST US From: cjpilot710@aol.com Subject: Yak-List: Fwd: Dragon Flying...not on my BUCKET LIST ____________________________________ From: stanjanowens@aol.com Sent: 1/24/2012 11:33:44 A.M. Eastern Standard Time Subj: Dragon Flying...not on my BUCKET LIST "DRAGON" FLYING IN CHINA IS SPECTACULAR. _http://player.vimeo.com/video/31481531?autoplay=1_ (http://player.vimeo.com/video/31481531?autoplay=1) ________________________________ Message 2 _____________________________________ Time: 10:00:56 AM PST US From: Didier Blouzard Subject: Re: Yak-List: Fwd: Dragon Flying...not on my BUCKET LIST YESSSSSSS on mine. When we will have no more petrol !!! Didier 2012/1/24 > ** > > > ------------------------------ > From: stanjanowens@aol.com > To: stanjanowens@aol.com > Sent: 1/24/2012 11:33:44 A.M. Eastern Standard Time > Subj: Dragon Flying...not on my BUCKET LIST > > > "DRAGON" FLYING IN CHINA IS SPECTACULAR. > > http://player.vimeo.com/video/31481531?autoplay=1 > > * > > * > > -- ____________________________ Didier BLOUZARD Portable : +33 6 24 24 36 72 Email: didier.blouzard@gmail.com ________________________________ Message 3 _____________________________________ Time: 11:44:53 AM PST US Subject: Yak-List: Tailplane front spar crack From: "Jacquescj6" Hi Guys First thanks for all the help so far. I have detect a crack in the front spar of my cj6 tailplane any body know how to fix this or should I get a new tail plane? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=364709#364709 ________________________________ Message 4 _____________________________________ Time: 01:37:36 PM PST US Subject: Re: Yak-List: Tailplane front spar crack From: doug sapp Is this the "std" crack found in many CJ horiz stab spars? Horizontal stabilizers are very hard to find new at this time. The last new one I was quoted for out of China was 6K. We are seriously considering building a jig to properly repair them. I know Rich Hess is needing one, Dan Fortin was looking for one also, but I don't know rather he repaired his or found a replacement. Where is yours cracked? Please take a photo of it and send it to me dougsappllc@gmail.com I am going to China next month and will inspect a few used units while there. Please contact me off list at the above address. Best, Doug On Tue, Jan 24, 2012 at 11:40 AM, Jacquescj6 wrote: > > Hi Guys > First thanks for all the help so far. > I have detect a crack in the front spar of my cj6 tailplane any body know > how to fix this or should I get a new tail plane? > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=364709#364709 > > ________________________________ Message 5 _____________________________________ Time: 04:31:36 PM PST US From: Cpayne Subject: Yak-List: Re:Tailplane front spar crack This condition was detected and addressed back in 1995, possibly before. My CJ as well as three in the same shipment, owned by Alan Beaver and Bill Thornberry, all had similar cracks. A California DER engineered a fix which was accepted by the FAA. It consisted of a doubler made from 4130, bent to fit the inside of the spar and affixed with bolts through the spar. I went a step further and added 2024 ribs on each side to help spread the load so stress was not merely shifted to the spar just outside the doubler. Many other CJ's were repaired in this manner. Eleven hundred hours later and no additional cracking. Old news, I'm surprised someone found an airframe without the repair. *Every* CJ mechanic should be aware, it was documented numerous times. Craig Payne ________________________________ Message 6 _____________________________________ Time: 06:09:26 PM PST US Subject: Re: Yak-List: Re:Tailplane front spar crack From: doug sapp Craig, I think we may have had this discussion before, I can't recall for sure, but you are correct in that an fix was engineered, but rather it was actually "accepted by the FAA" is up for debate and really does not matter. It is in my opinion a very poor fix indeed, it simply makes the center of the spar so stiff that it cannot flex, the result is that it effectively shifts the stress the the edges of the doubler as you have correctly stated. If in fact a DER actually engineered this fix he needs to get back to his most basic directives and re read 41-13-5. It would NEVER suggest using an spar doubler of that strength on a alu structure, in that position, let alone something made of 4130 chromemoly sheet. I will admit the solutions are very limited and the basic idea of a U shaped reinforcement with a doubler plate on the back side is most likely the best way to effect the repair but IMHO the reinforcement and the doubler should be no heaver than .040 2024-T3 aluminum, NOT 4130 steel, no not even stainless steel. The structure is made to flex, it cannot flex if you use steel. Yes we have had no failures using the "engineered" fix, but that does not mean the fix was done correctly, it simply means we have not had any failures yet. I have done several with the alu and they have not failed either.................. gotta ask: Was this newly discovered crack there last year at conditional? Was that area previously checked? Is checking for horiz spar cracks on the RPA's conditional inspection check list? When I was in China many years ago I inquired about this cracking problem and was told that it was caused by the cadets snap rolling the aircraft. I also questioned them about inflight spar failures and was told that there never had been one. All good food for thought Best to all from snowy Omak. Doug On Tue, Jan 24, 2012 at 4:26 PM, Cpayne wrote: > > This condition was detected and addressed back in 1995, possibly before. > My CJ as well as three in the same shipment, owned by Alan Beaver and Bill > Thornberry, all had similar cracks. A California DER engineered a fix which > was accepted by the FAA. It consisted of a doubler made from 4130, bent to > fit the inside of the spar and affixed with bolts through the spar. I went > a step further and added 2024 ribs on each side to help spread the load so > stress was not merely shifted to the spar just outside the doubler. > > Many other CJ's were repaired in this manner. Eleven hundred hours later > and no additional cracking. Old news, I'm surprised someone found an > airframe without the repair. *Every* CJ mechanic should be aware, it was > documented numerous times. > > Craig Payne > > ________________________________ Message 7 _____________________________________ Time: 06:47:55 PM PST US From: "Chris Wise" Subject: Yak-List: kenterry G'Day all, Do any of you know what happened to "ken terry" as my emails are not reaching him any longer. There was nothing personal if anyone thinks that my emails are been blocked. This is not so as we had a good dialogue going and he suddenly vanished. Thanks and cheers, Chris. ________________________________ Message 8 _____________________________________ Time: 07:54:28 PM PST US From: cjpilot710@aol.com Subject: Re: Yak-List: kenterry Unfortunately our good friend Ken Terry was killed in his T-34 several month ago. He is missed by a lot of us here in the RPA. He was in the back seat of his beloved T-34, with friend flying from the front. I believe the accident is still under investigation, but it was reported the airplane went into a steep climb, stalled, and hit the ground before they could recover. Both died instantly. No fire. He has indeed "suddenly vanished". Jim "Pappy" Goolsby In a message dated 1/24/2012 9:48:03 P.M. Eastern Standard Time, wise@txc.net.au writes: G=99Day all, Do any of you know what happened to =9Cken terry=9D as my emai ls are not reaching him any longer. There was nothing personal if anyone thinks that my emails are been blocked. This is not so as we had a good dialogue going and he suddenly vanished. Thanks and cheers, Chris. (http://www.matronics.com/Navigator?Yak-List) (http://www.matronics.com/contribution) ________________________________ Message 9 _____________________________________ Time: 08:34:38 PM PST US From: "Chris Wise" Subject: RE: Yak-List: kenterry G=99Day Pappy, Thank you for the email. I knew that he had a T-34 as he had emailed me some photos of the machine and we swopped emails on a regular basis. Dam, this is not good news and I shall miss him and his humour re the Muslims, gun laws and all of that good stuff. I must confess that I did wonder if he had passed away. My thoughts to all of his mates. I too have been to some funerals of some good mates lately. Makes one realize just how vulnerable we are to the fickle ways of life. All the best Pappy and thanks. Chris. Downunder. Australia. From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of cjpilot710@aol.com Sent: Wednesday, 25 January 2012 2:19 PM Subject: Re: Yak-List: kenterry Unfortunately our good friend Ken Terry was killed in his T-34 several month ago. He is missed by a lot of us here in the RPA. He was in the back seat of his beloved T-34, with friend flying from the front. I believe the accident is still under investigation, but it was reported the airplane went into a steep climb, stalled, and hit the ground before they could recover. Both died instantly. No fire. He has indeed "suddenly vanished". Jim "Pappy" Goolsby In a message dated 1/24/2012 9:48:03 P.M. Eastern Standard Time, wise@txc.net.au writes: G=99Day all, Do any of you know what happened to =9Cken terry=9D as my emails are not reaching him any longer. There was nothing personal if anyone thinks that my emails are been blocked. This is not so as we had a good dialogue going and he suddenly vanished. Thanks and cheers, Chris. ="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com /Navigator?Yak-List s.matronics.com/">http://forums.matronics.com p://www.matronics.com/contribution">http://www.matronics.com/contribution ------------------------------------------------------------------------------------- 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.