RE: How many RPMs on the ground for a West .50V1 with an 8X10?
A bladder of this size will allow almost 4 ozs of fuel, without bursting........most of the time. how long can a 40 sized engine run, running at 24,000 on almost 4 ozs of fuel? Just long enough to be started, launched and run through a 315 foot long [1/16th mile] timing zone about 3 or 4 times. I would guess the burn rate is close to 2 ozs per minute. The pressure remains constant enough, if you don't over fill them. At the very end of the run, the wall thickness of the tubing goes back to its' original thickness and the engine goes rich for a few seconds, signalling the end of the run and cooling the engine slightly.