Steam powered airplane

For the day this was an amazing achievement.

I looked a little deeper into this and found that a type of 3 stroke is more economical and uses the steam more efficiently

more torq and great use with generators

Do you have any links for the three stroke information?

https://en.wikipedia.org/wiki/Compound_steam_engine

http://www.douglas-self.com/MUSEUM/POWER/highsped/highsped.htm

If so it is rated at 10 kW at 450 rpm.

Thanks gadily will look the information over.
I do plan on building a steam engine at some point.