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" <ruben29...@...> 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
