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