Randy. You said: "If I am putting the "O-200" STC in my C-85...."
Ok that says it all. You are only modifying your C-85 . No need to upgrade the airframe. There is an easy misunderstanding of the O-200 STC's. One is to put a O-200 crank into your C-85 case - no changes to the airframe. The other is putting an O-200 in your aircraft. That will require to do all the upgrades to be eligible for the 415-D conversion including what has to be done to the elevator. But if your engine is upgraded to a C-85 you most likely had already some kind of modification to the elevator trim tab. See the Type Certificate: 110. Engines 12 lb. Continental C-85-12 or -12F Engine limits for all operations: 2575 r.p.m. (85 hp.) (Eligible with item 1(c), 3, 4, 6, 7, or 8 propeller only). Eligible on model 415-CD; eligible on model 415-C provided the following are accomplished: (a) Modifications specified under item 106 for installation of C-75 engine. (b) Wide elevator trim tab (1-3/8 in chord) installed per Erco dwg. 415-22031 or narrow trim tab (3/4 in. chord) installed per Erco dwg. 415-22027 (or item 401). Note: Conversion of continental C-75 engine to C-85 must be accomplished in accordance with Continental Service Bulletin M47-16, dated 6-7-48 and the oil sump dip stick recalibrated to indicate full when sump serviced with 4.5 qt. oil. END TC reading Hartmut ----- Original Message ----- From: randy_harvell To: [email protected] Sent: Tuesday, January 01, 2008 9:40 PM Subject: [ercoupe-tech] Trim System O.K. group... got a question about the trim systems in our 'Coupes: I presently have the original panel crank trim system in my plane (C model). I know that in order to convert it to a "D" or later model, you have to put the "trim tab" system in (which requires me to change the elevator.. UGH!!). I wish to keep it a "C" model. My question is: If I am putting the "O-200" STC in my C-85, would I have to install this "updated" trim system or can I stick with my panel crank one?? I've kind of went over the memorandums and such and can't come out with any clear answer. Am I missing something?? I am partial to the crank because I have had trouble (with other 'Coupes that I have owned) with the trim wire binding and breaking. The crank has always been nice to me. Someone help me out please. Happy New Year!!
