I have some data on the OS 55 AX, now. Got a chance to tach it in the Mariner tonite.

12x7 APC: peaked 12,300. Backed off to 11,800 or so for flight. That's good for close to 80 mph and around 10 pounds of static thrust.

Thomas: I like the idea of the scale door operation, but I think I'll pass. I have one of those electronic sequencer modules if you'd like to buy it cheap.