---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Mon 01/22/07: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:14 AM - Baffles (teamgrumman@aol.com) 2. 02:54 PM - Re: Baffles (Ian Matterface) 3. 11:52 PM - Re: Baffles (teamgrumman@aol.com) ________________________________ Message 1 _____________________________________ Time: 12:14:19 AM PST US Subject: TeamGrumman-List: Baffles From: teamgrumman@aol.com Interesting discovery today. I'm installing an 8406 oil cooler on a Cheetah using the Fletchair STC. I decided to make my own baffles instead of modifying the baffles per the STC. In the process, I discovered the left rear baffle (the one the oil cooler mounts to) on the Cheetah/Traverler (75) is about 1/2 to 5/8 inch too short. That is, it's too short for the given gap to the cowling. The left rear baffle fits well with #4 cylinder baffle which means the #4 cylinder baffle is too short too. I've known for a long time that the #4 cylinder baffle is made 3/8 of an inch too tall where it overlaps the #2 cylinder baffle, but always figured it was the right height along the aft edge where it joins the left rear baffle. If you look at the left rear baffle on a Tiger, you can see it is about 1/2 inch too high compared to the #4 cylinder baffle. There is a serious mismatch in this corner. The left rear baffle on a Tiger is the right height. The left rear baffle on a Cheetah is too short. The #4 cylinder baffle is just totally wrong - for either installation. What's really interesting is, I have the blue print and the baffles are made to the blue print. Conclusion: the original baffles were poorly designed or not designed at all, just installed as quickly and cheaply as possible. I have about 80 hours in fitting the baffles to my new cowling. - - - - Oh, and, by-the-way, The structural analysis is complete on the cowling. Facter of safety is 1.7 to 1.9 . . . . . . about the same as the Saturn V that went to the moon. To the moon, Alice. (OK, so, who knows where that comes from?) ps, the report for the FAA was about 25 dollars per page. ________________________________________________________________________ across the web, free AOL Mail and more. ________________________________ Message 2 _____________________________________ Time: 02:54:05 PM PST US From: "Ian Matterface" Subject: Re: TeamGrumman-List: Baffles Could this be that the rear Baffles for the early AA5 and 75AA5 and A's are almost one and the same. I have two new R/H rear baffles that the P/N's one them say one is a AA5 the other AA5A the only difference being one small extra hole and the different profiles of the flexible baffles. Ian MatAir ----- Original Message ----- From: teamgrumman@aol.com Sent: Monday, January 22, 2007 8:13 AM Subject: TeamGrumman-List: Baffles Interesting discovery today. I'm installing an 8406 oil cooler on a Cheetah using the Fletchair STC. I decided to make my own baffles instead of modifying the baffles per the STC. In the process, I discovered the left rear baffle (the one the oil cooler mounts to) on the Cheetah/Traverler (75) is about 1/2 to 5/8 inch too short. That is, it's too short for the given gap to the cowling. The left rear baffle fits well with #4 cylinder baffle which means the #4 cylinder baffle is too short too. I've known for a long time that the #4 cylinder baffle is made 3/8 of an inch too tall where it overlaps the #2 cylinder baffle, but always figured it was the right height along the aft edge where it joins the left rear baffle. If you look at the left rear baffle on a Tiger, you can see it is about 1/2 inch too high compared to the #4 cylinder baffle. There is a serious mismatch in this corner. The left rear baffle on a Tiger is the right height. The left rear baffle on a Cheetah is too short. The #4 cylinder baffle is just totally wrong - for either installation. What's really interesting is, I have the blue print and the baffles are made to the blue print. Conclusion: the original baffles were poorly designed or not designed at all, just installed as quickly and cheaply as possible. I have about 80 hours in fitting the baffles to my new cowling. - - - - Oh, and, by-the-way, The structural analysis is complete on the cowling. Facter of safety is 1.7 to 1.9 . . . . . . about the same as the Saturn V that went to the moon. To the moon, Alice. (OK, so, who knows where that comes from?) ps, the report for the FAA was about 25 dollars per page. ________________________________________________________________________ across the web, free AOL Mail and more. ________________________________ Message 3 _____________________________________ Time: 11:52:46 PM PST US Subject: Re: TeamGrumman-List: Baffles From: teamgrumman@aol.com There is no doubt they reused the same pieces for different shaped cowlings. I mean, why would anyone expect anything else? -----Original Message----- From: i.r.m@btinternet.com Sent: Mon, 22 Jan 2007 2:52 PM Subject: Re: TeamGrumman-List: Baffles Could this be that the rear Baffles for the early AA5 and 75AA5 and A's are almost one and the same. I have two new R/H rear baffles that the P/N's one them say one is a AA5 the other AA5A the only difference being one small extra hole and the differentprofiles of the flexible baffles. Ian MatAir ----- Original Message ----- From: teamgrumman@aol.com To: teamgrumman-list@matronics.com Sent: Monday, January 22, 2007 8:13 AM Subject: TeamGrumman-List: Baffles Interesting discovery today. I'm installing an 8406 oil cooler on a Cheetah using the Fletchair STC. I decided to make my own baffles instead of modifying the baffles per the STC. In the process, I discovered the left rear baffle (the one the oil cooler mounts to) on the Cheetah/Traverler (75) is about 1/2 to 5/8 inch too short. That is, it's too short for the given gap to the cowling. The left rear baffle fits well with #4 cylinder baffle which means the #4 cylinder baffle is too short too. I've known for a long time that the #4 cylinder baffle is made 3/8 of an inch too tall where it overlaps the #2 cylinder baffle, but always figured it was the right height along the aft edge where it joins the left rear baffle. If you look at the left rear baffle on a Tiger, you can see it is about 1/2 inch too high compared to the #4 cylinder baffle. There is a serious mismatch in this corner. The left rear baffle on a Tiger is the right height. The left rear baffle on a Cheetah is too short. The #4 cylinder baffle is just totally wrong - for either installation. What's really interesting is, I have the blue print and the baffles are made to the blue print. Conclusion: the original baffles were poorly designed or not designed at all, just installed as quickly and cheaply as possible. I have about 80 hours in fitting the baffles to my new cowling. - - - - Oh, and, by-the-way, The structural analysis is complete on the cowling. Facter of safety is 1.7 to 1.9 . . . . . . about the same as the Saturn V that went to the moon. To the moon, Alice. (OK, so, who knows where that comes from?) ps, the report for the FAA was about 25 dollars per page. ________________________________________________________________________ across the web, free AOL Mail and nbsp; Features Subscriptions href="http://www.matronics.com/Navigator?TeamGrumman-List">http://www.mp; available via href="http://forums.matronics.com">http://forums.matronics.com ________________________________________________________________________ across the web, free AOL Mail and more. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-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/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-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.