Subject: Front motor mounts.
From: ACRE NL
Date: 3/3/2002, 11:06 PM


Jerry Hey wrote:

Paul,   I appreciated  your visit today. As far as I know you are the
only 182 size aircraft to ever use the "big" runway.

   The only problem I have had with putting  the radiator inside the cowl
was finding adequate room for big outlets while retaining the sleek look
and performance of the Tailwind.     The cowl flaps on the side with the
faired ducting  just might work.    The ducting would not be much more
than a little sheet metal wrap over the gear leg supports.

If you have time,  I would like to see a sketch of how the Barry mounts
would be used with the pan plate.   Seems like the muffler  and the
upper brace would be occupying the same space.
Also,  how far out can one extend the pan plate?   It is .250" thick,
2024 T4.  If the forward mount could be centered on the forward exhaust
port and the plate extended from the engine case about 6 inches,  it
might work.   Can the Berry mounts be  horizontal?    I need to get my
hands on one.

Yes you are right about that. I forgot. Forget the pan mounts with your
muffler. Use the motor plate trick. Always gives more room around
the engine for turbos and mufflers.

I should have gotten some clarification on the PSRU adaptor plate while
you were here.  The drawings did not come through very clearly and  even
if they were clear, I need help in their interpretation.

Jerry

I'll send you some pictures.

Paul Lamar


Jerry. You don't need drawings. When Tracy sends you the psru tell him
you don't want the stock adapter plate. He should credit you $100.
 I will loan you mine since I don't need it anymore and you can use it as
a pattern to make your own with the starter on the side and the Barry
mounts built in. Your mill is much better than mine. Turn some aluminum
pilots on your lathe to align the two plates together. Then rotate
Tracy's plate to put the starter where you want it.

The hole saw was used to get a rough cut. I then used a boring head to get
the final starter pilot hole size.

Paul Lamar

Here are a couple more shots Jerry.

The torque load on the spacers and bolts between the psru and the
engine are less putting the rubber motor mounts on the plate. This is so because
the rubber bushings react the torque load from the prop. The torque
is doubled by the gear box so 400 ft pounds goes through the spacers
and the bolts into the engine if the rubber bushings are mounted on the engine.
If the rubber bushings are mounted on the plate on the other hand 
the bolts and spacers see only 200 foot pounds of engine torque.
Therefor deflections if any will be half.

Paul Lamar
 
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motor-plate-turbo.jpg

Tracy-stock-plate.jpg

starter-hole-finder.jpg