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Hi all,
Sandwich plate may work (even well), BUT it is not
the cleanest solution, more likely the simplest.
This engine was never built to be a load carrying
member of the drive train (like some motorcycle or racing
engines....).
I don't even like the Mistral Engines solution (
and they probably did a LOT of homework on this) - the backplate, altough the
loadpath is easier - straight through the engineblock, no turning forces 90º
into the sandwichplate and back 90º into the framemount.
Personally I would keep any proploads
(push/pull/torque) off the engine.
A triangulated frame that attaches at the PSRU
would be better - Prop-Trans-Mount-Frame -
The engine hangs on the other side and provides the
power, nothing else.
As long as you run direct-drive the torque will
never be more than the engine produces, but as soon as you ad rpm-reduction you
introduce more torque coming back into the engine-housing....
Am I wrong somewhere...??
Thomas J.
----- Original Message -----
Sent: Saturday, February 24, 2007 4:48
PM
Subject: [FlyRotary] Re: Primary
regulator, and motor mount plate
Greetings,
The Dominator gyro is
on order, to arrive around the first part of April (I hope). The gear
drive is still on order from Autoflight, and hopefully, will be shipping
soon. All I can do in the mean time is get the engine as ready as
possible, which mostly means making a new engine mount plate of some
type.
Question one- If I were
to make a sandwiched plate, similar to what CCI does (did ?) with their
mounts, how thick would it need to be for a single rotor? The CCI
plate was 1/2" thick for the two rotor, and I made my first
single rotor mount that thick as well. Since I'd like to reduce
some weight, I'm wondering what I can cut this down to. I'm guessing
3/8" at least, and maybe 1/4". Any
suggestions?
Second
question, how much oil bypasses the primary regulator (in the
front cover) under normal operation? Does any bypass at all? I
know it's there primarily to prevent overpressure of the oil cooler in case
the lines get blocked, but I wonder if it's actually needed for normal
operation. In other words, can I plug up the primary regulator, and be
OK as long as nothing in the oil lines gets plugged
up?
Thanks,
Rusty (waiting for Ed
to try his favorite brazing rods on the board)
Rusty,
I like the mount plate
for simplicity - however it does move, and move enough to get leaks. Since
this is a perceived problem with the 2 rotor, I would leave it 1/2" for the
one rotor, with the required internal holes.
Just my opinion
Matey!
George ( down
under)
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