________________________________
From: ruben29578 <[email protected]>
To: [email protected]
Sent: Sun, July 25, 2010 4:52:03 PM
Subject: [ercoupe-tech] Re: Eb\ngine oil, Vacuum pumps et al
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
--- In [email protected], "John Cooper" <j...@...> wrote:
>
>
> Question: If your 415C "under TCDS A-718" is converted to a C-85 is the
> starter still legal?
>
> Good catch! Read on, and you'll see the generator has to come off also! ;)
>
>
>
> John Cooper
>
> Skyport Services
>
> 518 797-3064
>
> www.skyportservices.net
>
> _____
>
> _
>
HI,
The first coupes did not have starters or generatorss, but most all later
models, after 1940 did come equiped with both... Delco units, similar to auto
generators. The earliest Gen were 13 amp, later changed to 25, then 35
amps...all approved for C-75 or 85 and 90 engines.
With the curent electronics... transistors, etc, I sdee no need for the change
to an alternator --about $1000+, plus sawing off the shaft on the accessory
case to utilize an alternator.... Only advantaagfe I see is the re-charging of
a
weak battery at Idle speweed. And as you know, one sdhould not let an air
cooled engine sit lone at idle.
The Delco units can be rebuilt with standard Delco brushes, etc....
The one change I might consider is the repplacement of the Delco regulartoer
with a solid state device.....BUT, mine is still operational, works fine still
for the time I have owned N93530...since 1982. :)
Have Fun - Fly Safe
regards,
Harry Francis
