<HTML>Hi Hans,
The Quadrohomb is an intriguing engine design, and it will be interesting to see the results when you get it built and running. I think it will be possible to seal it well, and the balance looks good; my main concern is the surface-to-volume ratio and resulting heat transfer between inlet and exhaust steam via the inner surface area of the engine. What displacement will the prototype engine have, and what kind of steam inlet/exhaust valves are planned?
I recommend a visit to the website of the Hochhut Technische Sammlung in Frankfurt-Am-Main:
[
www.hochhut-museum.de]
Folks in this forum will find this collection interesting, and also please tell us about the Sammlung's 1903 Stanley! That is an historicaly significant model -- first with direct gear drive to the rear axle, I believe. Is this car in running condition?
Peter</HTML>