Scram Jet success
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HellOnWheels
HellOnWheels
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...is that the one that flies so fast it "creates" it own fuel?
HOW
Pronto
No amount of evidence will ever persuade an idiot.
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Saw the video of that on the news tonight. Pretty damn cool. Is 7000 mph faster than a rocket going up out of the atmosphere? They mentioned a trip NY to LA would be about 1/2 an hour.
JDSfastGN
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yeah pretty cool stuff. Thats fast as hell
Re: Re: Scram Jet success
As I understand it, it uses a series of intake and exhaust nozzles to force enough air in to get enough O2, and develope enough thrust to work really well. Kind of a *rocket* motor, that doesn't have to carry it's own oxydizer.
1/2 LA to NY, is time of flight, the take off and landing approaches probably will make it a 2.5 hour ride. The human body can take the *speed*, it's the G forces, getting to and stopping from that speed, that can be a real problem.
As I understand it, it uses a series of intake and exhaust nozzles to force enough air in to get enough O2, and develope enough thrust to work really well. Kind of a *rocket* motor, that doesn't have to carry it's own oxydizer.
1/2 LA to NY, is time of flight, the take off and landing approaches probably will make it a 2.5 hour ride. The human body can take the *speed*, it's the G forces, getting to and stopping from that speed, that can be a real problem.
Bescurred
BOOSTED SHAMU v2.0
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You guys know we have missile silos that can have a nuke anywhere in the world in 20 minutes or less. Don't ask me how I know.
7000 mph will get you out of the atmosphere (so will 1 mph but it takes much longer
), but it's still sub orbital.By definition a scramjet needs to stay in the atmosphere to work, so a scramjet would be a launch platform to space, but not a means to get to space. It gets you close enough that a conventional rocket can easily go the rest of the way.
Originally posted by UNGN
7000 mph will get you out of the atmosphere (so will 1 mph but it takes much longer
By definition a scramjet needs to stay in the atmosphere to work, so a scramjet would be a launch platform to space, but not a means to get to space. It gets you close enough that a conventional rocket can easily go the rest of the way.
Will it not work in space.
The scram jet in question needs to be going Mach 4 to work. It uses the solid rocket to get to that speed, then it can support combustion. It has no moving parts other than the fuel system but will probably have variable outlet diameter just like a jet engine once developed. If it has no moving parts, how would they regulate the throttle?
Remember the Buzz Bombs of WW2? They were a ram jet which pulsed combustion. Very few parts with that engine.
Remember the Buzz Bombs of WW2? They were a ram jet which pulsed combustion. Very few parts with that engine.
The throttle is regulated by the amount of fuel injected into the engine. The V-1 was a pulse jet engine and connot be compared to a ramjet or scramjet engine. And yes your right about having a variable nozzle but that is not part of the engine.
Nasty is right about this particular SCRamjet. This is a technology demonstrator to square millisecond lab measurements with multi second real life data. It didn't have any moving parts because it was designed to fly at full throttle for about 11 seconds. It even used hydrogen for fuel, so there was no complicated fuel pumps.
Because the Combustion is supersonic, something is going to have to accellerate the fuel to supersonic speeds so it will be combusted. In this demonstrator, you can just pressurize a tank and for 11 seconds, Supersonic fuel will come out of it. You can't do this on any practical SCRamjet.
A production SCRAM jet would be a hybrid, with convensional afterburning jet (probably a low bypass turbofan) to get the scramjet up to speed and then the SCRamjet takes over. It would also use Jet fuel and not Hydrogen.
The SR-71 used a similar technique. It had a Turbojet engine inside of a ramjet.
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