Paul,
At this point my rotary engine options are better if I use a
horizontal engine and a right angle gear box (bevel) with a reduction
from perhaps 6,000 engine rpm to approximately 2,000 rpm. A near 1:1
ratio is also a possibility. It needs to be reliable, able to handle
about 75-80 hp for this application, but small and lightweight for
aircraft use. I think I know my personal limitations and gear box
design is one of them at this point. Any suggestions?

My thanks to you and everyone participating.

Regards,
John McEverett

Take a look at some quad four rear axles. As I recall some of
them have aluminum housings.


Paul Lamar

I could not find the live axle quad I was looking for.
I may have dreamed it :)

If you do decide to build a right angle gear box I can highly
recommend Arrow Gear. They have been around for a long time.
I worked on a land speed record car design and Halibrand (no longer in
biz I think) built a live rear axle for us using Arrow
gears. The Stock Gear Catalog is very helpful in designing
gear boxes.

http://www.arrowgear.com/downloads/downloads_documents.htm

Paul Lamar