I had this brain storm on lateral bracing of the motor mount
for my Kiss Cruiser. I was trying to fit a decent size 
oil pan under there along with the rad and a lateral
brace tube and still leave room for motor mount
deflection. I finally gave up and added two more tubes to 
the firewall making two tripods on either side of the engine
extending out from a firewall base. Unfortunately this will
not work on a tandem airplane like the RV4.
 
I will probably attach the 1/2 inch aluminum motor mount brackets 
to the engine with those same big 10 MM bolts Tracy uses to 
attach his redrive. Those are rather underutilized right now.
This allows great freedom in the vertical and lateral position 
of the rubber mounts.

It really frees up the space under the engine where a lateral 
brace tube was previously required. Will work great on a Lancair 
360 as those have a similar cowling and firewall hard point locations
to the that of the Kis. 

It entails beefing up the firewall some what. Drawings and loads
when I get a new monitor for my fast DOS computer running old ACAD.

I decided to not use the rubber bushing in the firewall trick
as that is out side the main focus of getting the engine installed
and working. Perhaps with a couple more years life expectancy on my
part I could explore some of these more far out ideas.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org