Paul, could you please render a new version of the CH-640 mount(based on
the
ch-801, but with a lower rear attach from oil pan rear over the nose gear
strut), utilizing the Doddridge plate, Tracey Cook RD1-C, rear lower oil
pan
vibration stabilizer, etc. (basically all the features of the final
version
you sent) but move the plate and engine out 6" further from the fire wall
to
accommodate for the use of the RB light weight center and end plates? I
spoke with Mathieu Heinz when I picked up the wings in Canada, discussed
the
implications of the lighter weight installation, and his recommendation
was
to move everything out 6".

Also could you make notes for me as to the basic raw construction
materials
used, like different tubing sizes, IE diameter and wall thickness.
I have both Q-Cad and Alibre now, so I should be able to read the cad dwgs
directly.

Craig Smith

snips...

Preliminary motor mount design.

One of the unanticipated (by me) side benefits of a light weight 200 pound
(with PSRU & acc.) 250 HP p-port all aluminum engine moved six inches
forward in the cowl is more room for the cooling system.

I would also take advantage of the increased net payload by enlarging
the fuel tanks for more range. Lots of range is a safety factor as
you could get somewhere and need to go back because of weather.

You will also need a 3 blade prop to absorb all this HP.

This airplane is going to blow a lot of peoples minds.
Excellent short field performance will be all too obvious.

Paul Lamar


Two hundred pounds with PRSU and acc. ? Is this accurate Paul, I thought
that was an approximate weight for the light single rotors.

John


Well the bare block two rotor came out to 109 pounds.
There is a picture of Doug holding one at 7 Stock on the
front page of the web site.
I guessed at the rest. 45 pounds PSRU. 7 pounds starter
8 pounds alt., etc., etc..

Poorly educated guess :) Probably not including fluids.


Paul Lamar