12 Cylinder Air Engine, please tell me what type?

[roman]

Hi everyone,
I have this engine, it was not working when it landed into my hands. Someone probably took it apart and reassembled it wrong. I took it apart, cleaned everything and put it back together, it works very nicely. I was looking for some info on it on the Internet, and couldn't find anything. Maybe someone can tell me what engine it is.
Here are photos of it:

Here's a link to more photos: http://s808.photobucket.com/albums/zz10/romyald/12 Cylinder Air or Steam Engine/

Here's my YouTube video of it: [ame]http://www.youtube.com/watch?v=G5xGvnhds_I[/ame]

Thanks!

 

[Kmot]

Whatever it is, it sure is awesome sounding when you wind it up! ;D

 

[Brian Rupnow]

That is a "swash plate" engine. The same principal is used in many hydraulic motors.