Can't wait for the Lunar Olympics! 1/6 gravity will make sports a lot more interesting.
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xkcd said:our cars are always oxidizing; we just try to keep it from happening suddenly.
Does anyone know how to make a good Orbiter video? Fraps just isn't working right on my computer...
A6 ugly? From which side it's ugly?
Hybrid rocket engines are marvellously "simple" mechanically but a to even (very) roughly size :beathead:
Well, it is regeneratively cooled, i.e. hydrogen is run through small tubes along the nozzle wall to cool it
I'm sure that while the outside wall of the nozzle is really cold, the inside one is quite a bit more...toasty.
You're not calling the A-10 ugly, right..? :huh:
The inside wall is also not at the 6000°C that you have in the center of the combustion chamber. There is a bit of film cooling taking place by injecting hydrogen-rich gas at the sides of the combustion chamber without also injecting oxygen into the stream, also the exhaust cools a bit while expanding in the noozle.
I have some simulation data here, it is not 100% accurate, but gives you a good impression of the conditions at the nozzle heat exchanger:
table
In case Rankin aren't that easily understood... I can also convert the data into K or °C, the original table was calculated in Rankin