Thanks guys, it is a fun little engine!
The crankcase was sold to me by Keith at BME engines. It was a project they had started and got sidetracked and never got around to doing for sale. He sold the lot of crankcases only. Unfortunately all the crankcases have been sold. Here are three available, (I believe still available) that are very similar:
http://www.rcuniverse.com/forum/m_54...page_14/tm.htm
It is made by cutting and joining two Echo 23.6cc engine crankshafts, and using their cylinders, pistons, etc. It runs incredibly well. No vibration at all, but then it is a twin, and also I was extremely careful to get the crank halves all lined up and indexed before I welded them together. It, as well as numerous other engines I have, runs on a system we have invented that we call "Gas/Glow". The Gas/Glow mix is one part of 10% oil, 10% nitro glow fuel to two parts of high test gasoline. You use a four stroke plug; no glow power needed after start up. It is a cheap, lightweight system that runs and works really well. Here is all the info:
http://www.rcuniverse.com/forum/m_8009384/tm.htm
Note: The needle valve on the firewall and the red tubing coming from the engine is for my impulse pump type smoke system.
Take care,
AV8TOR