I stopped off at Auroa Ill. on the way to OSH  where Bill Schertz keeps his
Rotary Powered Kis cruiser. We have named the Schertz beam motor mount after Bill as he came up with the idea.

Bill did a fine job of installation. I am seeing some fine  installations lately. It is very satisfying to me as  all the work on the newsletter for the past ten years is finally paying off. The Kis Cruiser is a difficult installation as the cowling sits right down on top of the engine.

His cheek rads are in parallel which is the right way to do it if you are doing two rads. Bill has run the engine with no problems. It will soon fly.
He uses Wiggins couplings and aluminum tubing wherever practical as they are the most reliable water plumbing connections available. The safety wire holding them together temporarily will be replaced by clamps before he flies.

If somebody wants to make a batch and sell them let me know as I have drawings.
Wiggins couplings are widely used on airliners and high buck Formula I racing cars. They are over $100 each if you buy them from the car race supply houses.
Butch built and sold out a batch about 5 years ago. But I have not heard from him lately.

Great job Bill.

Paul Lamar