LARRY A ROSA
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- Mar 2, 2020
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I see multiple obvious problems here.
-This clamshell nozzle that you're so jazzed about is overly complex. Just jettison the nozzle if you have an emergency. That will release all the chamber pressure and result in the loss of thrust. Such a system will be a lot simpler and, more importantly, more reliable. Hydraulics fail much more often than ordnance does. You also won't have the problem of holding that nozzle closed against hundreds of PSI of chamber pressure, and a clamshell nozzle, if built, would have to be 100% totally sealed when closed, with nothing leaking through the seam between the halves while the motor operates. Leakage would, at best, result in significant efficiency losses or, at worst, wreck the nozzle and anything near it. Preventing this leakage against the chamber pressure of a rocket motor/engine presents a significant problem.
-The melting point of a substance is not the point at which it will fail due to heating. Materials can lose their strength when heated excessively even if they are not close to melting.
-The RL64 engine is fueled by hazardous hypergolic chemicals that you don't want anywhere near a driver or spectators, namely hydrazine and red fuming nitric acid. The Jayhawk also achieves its range and speed flying at a high altitude and being a small, light drone vehicle that weighs only a few hundred pounds. You can't just strap the same engine to a different vehicle and expect similar performance.
-You have a lot of other problems besides propulsion - aerodynamic drag being a major one, and also how you're going to prevent the whole thing from flipping over as you create shock waves between the car and the ground. 1600 mph is above Mach 2. There's a reason why supersonic aircraft typically also fly very high - the air is thinner and produces a lot less drag. Supersonic driving has been done once. This was back in October 1997, using a pair of Rolls-Royce jet engines that produce much more thrust than any motor we're going to be talking about here, and that barely broke Mach 1. You're talking about doing something that is going to require professional engineers and a huge amount of funding. It is well beyond the scope of a hobby forum.
that chamber will never close........ no one is that $%#%$# come on...... it is easy to open and close the all steel nozzle with a hydralic system (again)..... that is all it moves......full open to return to the (1) size nozzle.
full on or off......... thats it (again) ...... the whole reason is to stop all thrust...... there is ABSOLUTLY NO WORRY FOR AN EXPLOSION...... on/off.
if that hasen`t answered your question...... you can listen to BLACK SABBATH on these wicked altec lansing whorns ?
R-A-T-H-E-R......... here here ......