---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Sat 09/27/03: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:23 AM - Re: Cheetah------>Tiger (Aucountry@aol.com) 2. 12:45 PM - Re: Re: Cheetah------>Tiger (Ron Levy) 3. 12:54 PM - [ Charles F. Long ] : New Email List Photo Share Available! (Email List Photo Shares) ________________________________ Message 1 _____________________________________ Time: 11:23:05 AM PST US From: Aucountry@aol.com Subject: TeamGrumman-List: Re: Cheetah------>Tiger --> TeamGrumman-List message posted by: Aucountry@aol.com In a message dated 09/27/03 07:59:56 AM, aerodave2@bellsouth.net writes: > I am sure this has been discussed extensively in previous months/years but > can > someone tell me why you can't put a Tiger engine in a Cheetah? If you adhere > to load limits and speed restrictions, etc then I was just wondering why > this > would not be an option. I know there is a spar issue but wouldn't strict > observation of load limits cover you on this from a safety standpoint? > This is an excellent question. Both the Tiger and the Cheetah are built on the same Type Certificate. With the exception of the spar, engine mount, and engine (with all the baffles and such), they are the same plane. Technically, no STC is required to change one to the other. We aren't changing, or modifying anything on the Type Certificate. Flame away. All that is required, legally, is to transfer all of the hardware for a Tiger to a Cheetah, have an FAA Air Worthiness inspector come and inspect the plane to see that it conforms to the portion of the Type Certificate related to a Tiger, have him write up the required paperwork and you're done. Case-in-point. I converted a 1975 7ECA Citabria to a 2001 7GCAA Citabria. I went through the Type Certificate, bought all of the required parts, and assembled a 7GCAA, literally, from new parts. Then I got 2 FAA Air Worthiness inspectors who spent 4 hrs going over every inch of the plane, and blessed it as a 2001 7GCAA. I changed a lot more than the engine mount and spar. I changed all of the static system, the electrical system, the engine from an 115 hp O235 to a 160 hp O320, wood spar wings to metal spar wings, all the aircraft lighting, spring gear, spring gear mounts, tail wheel, wheel fairings, fuel system, and the interior. I was reissued a new data plate that showed date of manufacture of 2001. The serial number was changed from 1072-75 to 1072-75 Conv. The model showed a 7GCAA. Nothing is impossible. You just need to do your homework, know your inspector and know that he knows you know what you're doing. Gary www.AuCountry.com Home of "Team Grumman" TeamGrumman-List@matronics.com http://www.matronics.com/subscribe ________________________________ Message 2 _____________________________________ Time: 12:45:51 PM PST US From: "Ron Levy" Subject: RE: TeamGrumman-List: Re: Cheetah------>Tiger --> TeamGrumman-List message posted by: "Ron Levy" > From: owner-teamgrumman-list-server@matronics.com > [mailto:owner-teamgrumman-list-server@matronics.com]On Behalf Of > Aucountry@aol.com > > --> TeamGrumman-List message posted by: Aucountry@aol.com > Both the Tiger and the Cheetah are built on the same Type Certificate. With > the exception of the spar, engine mount, and engine (with all the baffles and > such), they are the same plane. Technically, no STC is required to change > one to the other. We aren't changing, or modifying anything on the Type Certificate. Gary is correct if you do a complete upgrade, including the spar. However, if the result differs one single iota from an AA-5B, then it is not an AA-5B, and a field approval (unlikely) or STC is required, since the airplane no longer matches the type certificate as either a Cheetah or a Tiger. Maynard Crosby's STC for a Cheetah with a Tiger engine (but no changes aft of the firewall) fills that gap. Thus, if David wants just to swap the engine but not the spar, he needs Maynard's STC. Ron ________________________________ Message 3 _____________________________________ Time: 12:54:39 PM PST US Subject: TeamGrumman-List: [ Charles F. Long ] : New Email List Photo Share Available! From: Email List Photo Shares --> TeamGrumman-List message posted by: Email List Photo Shares A new Email List Photo Share is available: Poster: Charles F. Long Subject: GPS Color Moving Map For Less Than $500 http://www.matronics.com/photoshare/charles.long@gm.com.09.27.2003/index.html o Main Photo Share Index http://www.matronics.com/photoshare o Submitting a Photo Share If you wish to submit a Photo Share 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