Arnold,
I am not sure I am convinced that a pressure driven engine is any less complete whether or not it runs on steam pressure or air pressure. An impact wrench for example should run on steam. Would be really messy and wet but it would work. The motor I saw at the show in Orlando was running independently on pressure I can assure you. I looked at it very closely. The motor speed was directly affected by available pressure. When you turned the supply valve down the motor slowed. Harry even pulled some of the valve assembly apart for me to view it. The model at the show was exposed to show the valves and crank and such as it was operating. My personal and I guess professional take is that this thing will run providing available pressure. All in all, it is a VERY elegant design. Rolling bearing valve push rod assembly. Radial type configuration so that the loading piston is followed by like a 33% cutoff. It appeared to me that the motor would be very "Torquey" for lack of a better term. The crank load is carried by about three pistons at a time. While I was looking at the motor I was speaking with a retired aeronautical engineer who was also at the show. He nor I could find any magic gerbils....LOL. So, hope this help. That was my hands and eyes on impression of the motor. Let me know what you think.
FrazDog
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