I have been looking into the Clem's engine for a few months now, I built many prototypes in the past 6 months. I do believe this engine did work, after the experiment showed a decrease in head pressure as the drum increase in speed.
This is one version that shows head pressure decrease, as the rpm's increase.
http://www.youtube.com/watch?v=8TEvKAGpqOw&feature=plcp
This is one version that shows head pressure decrease, as the rpm's increase.
http://www.youtube.com/watch?v=8TEvKAGpqOw&feature=plcp