George Lendich wrote:

Paul,
I sent a lengthy e-mail as a current update (with photos), but I don't think it went through. I've sent the photos separately
this time.
Basically I said I checked centre front and back allowing shrinkage and clearance - it's as close as I can get to perfect.

I'm considering Butch's stiffening ribs (lower internal face) between the thick PSRU mounting plate (spreading out) spokes of a
wheel) to the edges of the face ( 10 wide 5mm thick) at 30 degrees. Chime in here Butch if I've got your suggestion wrong. In my
weight calculations I allowed a 10mm thickness for the arch which will be more like 5mm after milling so it will still be in the
targeted weight.

I just feel that the lower thin (5mm) face section needs some stiffening. This will also facilitate a better aluminium flow, in
the foundry process.

I was going to have the pattern drilled but with shrinkage involved, I will just guesstimate and make allowances for shrinkage
and a couple of millimetres for position variation of mounting holes.
George (down under)

Can you make these bigger George? Hard to tell.


Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.