Thanks for that info. I am on the road and don't have my books along. I THINK my old 977 with the bungee trim was converted to 85hp, it came with the cooling baffles in a box, a new 85 hp dataplate in an envelope,and of course no trim tab. LOOKS like they just done a quick and dirty conversion job. I just finished a small book of 337's to get her up to date, I am taking notes for the second book now.
--- In [email protected], William R. Bayne <ercog...@...> wrote: > > > Hi Donald, > > It's easy to get confused as to what is and is not "required". It's > far better to have someone refer you to an authoritative source of > information that you can review and absorb correctly than to be "told" > a half truth by someone who, in good faith, genuinely (but wrongly) > believes it to be the whole truth. > > If the Ercoupe is Serial No. 1622 or below, the original trim was one > of two methods of "loading" the elevator with a bungee. These planes > must have the later trim system installed that operates a movable tab > on the elevator if the engine is upgraded to 85hp. It doesn't matter > whether you have the narrow or the wider trim tab if the plane is a > 415-C or CD operating at 1260 lb. gross. These planes DO NOT have to > have the additional baffles around the oil sump for cooling with 85 hp > to be in compliance with Type Certificate 718. > > On the other hand, the D, E and G Models (and the 1360 lb. gross Light > Sport STC), each "Normal Category" aircraft operating at 1400 lb. gross > weight with 85 hp MUST have the wider trim tab AND the additional three > baffles around the oil tank installed to be in compliance with ATC 787 > (or 1360 lb. gross by STC). > > So the "true or not true" answer is properly "it depends" ;<) > > Regards, > > William R. Bayne > .____|-(o)-|____. > (Copyright 2010) > > -- > > the later elevator with a movable trim tab On Jul 25, 2010, at 21:26, > Donald wrote: > > > Somewhere I was told that you had to increase the trim tab and put on > > some cooling shields down around the carb. True or not true? > > > >> > >> On Jul 25, 2010, at 4:52 PM, "ruben29578" <ruben29578@> wrote: > >> > >> Ok I know it is an old topic, but I am restoring an Ercoupe and would > >> like to convert the C75 to a C85, the SB M47-16 does not state > >> anything about the starter and generator. > >> The TCDS of the plane tels you the starter and generator are no > >> longer allowed, i.a.w. note 308 and 107. The TCDS of the plane does, > >> as far as I can see, not give any replacement P/N for both. > >> The TCDS of the engine states the same starter P/N for both engines. > >> Also the P/N of the generator is useable on both engines i.a.w. the > >> engine TCDS although, if I had to change it, I would go for more > >> capacity or probably an alternator. > >> > >> I am studying to be an A&P, only have the practical exam to go, but > >> even I am lost here. > >> > >> Who can help me out? > >> > >> Ruben >
