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Pulse Detonation Engine, first stage or ..
http://www.pr.afrl.af.mil/divisions/prt/pde/index.html
Check it out, and anyone have any ways to use it as part of a Shuttle replacement or as part of a seperate craft that does some of the shuttles missions? Mike Alaska |
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Pulse Detonation Engine, first stage or ..
Abrigon Gusiq wrote in news:406AB84E.65B62223
@yahoo.com: http://www.pr.afrl.af.mil/divisions/prt/pde/index.html Unless it can be scaled up to the necessary thrust levels, there's no chance of it being used at all. I'm not sure how much advantage it would have over a conventional rocket engine, as I haven't seen figures for specific impulse--probably its only advantage, if it all. --Damon |
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Pulse Detonation Engine, first stage or ..
I think the PDE will scale up to make a flyback launch assister for a CATS
SSTO. The site says the PDE is great between 2 to 4 machs and can take off from zero speed so it offers a lot in the way of airbreathing launchers. ^ //^\\ ~~~ near space elevator ~~~~ ~~~members.aol.com/beanstalkr/~~~ |
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Pulse Detonation Engine, first stage or ..
Allen Meece wrote:
I think the PDE will scale up to make a flyback launch assister for a CATS SSTO. The site says the PDE is great between 2 to 4 machs and can take off from zero speed so it offers a lot in the way of airbreathing launchers. Who cares? Supersonic mated flight and seperation is too complex and risky. Seperate subsonically (with existing 'first stage' aircraft, if possible) at the highest altitude practical, to minimize drag and engine expansion issues for your orbiter. -- You know what to remove, to reply.... |
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Pulse Detonation Engine, first stage or ..
Joann Evans wrote in message ...
Allen Meece wrote: I think the PDE will scale up to make a flyback launch assister for a CATS SSTO. The site says the PDE is great between 2 to 4 machs and can take off from zero speed so it offers a lot in the way of airbreathing launchers. Who cares? Supersonic mated flight and seperation is too complex and risky. Seperate subsonically (with existing 'first stage' aircraft, if possible) at the highest altitude practical, to minimize drag and engine expansion issues for your orbiter. Hmm, the idea does sound interesting, though. If you had a TSTO which separated at supersonic speed very high in the atmosphere, then even though the PDE lower stage would careen and tumble away at high speed, the PDEs could allow it to quickly right itself to return for a controlled landing. The whole pulsed idea seems suited for dealing with radical chaotic motion. But the scramjet unfortunately isn't enough to get to orbit. You'd need further rocket propulsion to take over after the scramjet. |
#6
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Pulse Detonation Engine, first stage or ..
Who cares? Supersonic mated flight and seperation is too complex and
risky. Seperate subsonically (with existing 'first stage' aircraft, if possible) at the highest altitude practical, to minimize drag and engine expansion issues for your orbiter. I think the more you can accelerate an orbiter with a flyback PDE booster, the less tankage you will need in the orbiter. That seems like square one, keep the fuel out of the orbiter. I doubt that booster/orbiter separation at mach 4 [PDE's max efficient speed] will be such a big deal. It's a new thing but so what? *Everything* was once new and baffling. ^ //^\\ ~~~ near space elevator ~~~~ ~~~members.aol.com/beanstalkr/~~~ |
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Pulse Detonation Engine, first stage or ..
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Pulse Detonation Engine, first stage or ..
risky. Seperate subsonically (with existing 'first stage' aircraft, if
possible) at the highest altitude practical, to minimize drag and engine expansion issues for your orbiter. Yes, this is doubtlessly the best way to begin an air launch program. It's cheaper and faster than developing a high performance PDE launcher aircraft as well as a Dyna-Soar type of spacecraft. And the moon ship must be lifting body, not a milk jug or the whole project is a waste of money as far as developing CATS is concerned. ^ //^\\ ~~~ near space elevator ~~~~ ~~~members.aol.com/beanstalkr/~~~ |
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Pulse Detonation Engine, first stage or ..
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Pulse Detonation Engine, first stage or ..
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