Perry Mick wrote:

Paul, I tried analyzing the forces in the struts of the new LEZ engine
mount. This just looks at one side, one half of the mount. The first one
is weight of engine only, the second assumes a weight force and a thrust
force. In each case I used 10 lbs. to keep it simple.

The node where the three tubes come together in the center would be high
stress, as you said, all three tubes are trying to pull themselves apart
from each other. The other high stress point appears to be the upper
extrusion, with a large downward pull on it.

Perry

Good work Perry. You can beef up the extrusion in the vertical direction
with a 4130 angle  bolted to the firewall going straight up more or less.
Klause cracked his alloy extrusions so he replaced them with 4130 pieces.

As I understand it the spar is below this extrusion so bolting something below
it is out of the question. 

A finger patch made from .049 4130 sheet will give a satisfying feeling 
about the three tube joint :)

Paul Lamar
 
The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2004 All world wide rights reserved.