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Comments on: Rocket plane breaks airspeed record

NASA successfully tests Mach 10 rocket-powered "scramjet" after a day's delay.
Photos: NASA's X-43A "scramjet"

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Right Stuff
by gentlewhisper November 17, 2004 10:43 AM PST
Can I borrow a stick of Beemans?
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Right Stuff
by gentlewhisper November 17, 2004 10:43 AM PST
Can I borrow a stick of Beemans?
Reply to this comment
Reporter needs basic retraining..
by Earl Benser November 17, 2004 11:41 AM PST
A scramjet is NOT a rocket. Any reasonably intelligent person
would know that. Maybe reporters are excluded from that
category.
Reply to this comment
all jets are rockets, not all rockets are jets
by neidr November 18, 2004 6:01 AM PST
A >rocket< is propelled by the rocket effect- the lack of restraint, the >nozzle<, at the rear of the combustion chamber allows an unbalanced force upon the front of that chamber. This forward-directed vector allows for motion if the motor is free to move. A >jet< is similarly propelled- the pressure is upon the fan blades that bring in air/fuel through the front of the engine. In a >scramjet< this pressure is upon the incomming, hypersonic, air/fuel mix. The lack of fan blades is due to the inability of the chamber pressure wave, to travel ultrahypersonically forward through this mixture. This incomming mix effectively becomes the >front< of the combustion chamber making this type of rocket engine a special-case type of flapper-valveless WW2 V-1>Buzz Bomb< ramjet- which was a true rocket only while it's venetian blind-like valve was closed, a jet while it was open- an aviation Schroedinger's cat!
Reporter needs basic retraining..
by Earl Benser November 17, 2004 11:41 AM PST
A scramjet is NOT a rocket. Any reasonably intelligent person
would know that. Maybe reporters are excluded from that
category.
Reply to this comment
all jets are rockets, not all rockets are jets
by neidr November 18, 2004 6:01 AM PST
A >rocket< is propelled by the rocket effect- the lack of restraint, the >nozzle<, at the rear of the combustion chamber allows an unbalanced force upon the front of that chamber. This forward-directed vector allows for motion if the motor is free to move. A >jet< is similarly propelled- the pressure is upon the fan blades that bring in air/fuel through the front of the engine. In a >scramjet< this pressure is upon the incomming, hypersonic, air/fuel mix. The lack of fan blades is due to the inability of the chamber pressure wave, to travel ultrahypersonically forward through this mixture. This incomming mix effectively becomes the >front< of the combustion chamber making this type of rocket engine a special-case type of flapper-valveless WW2 V-1>Buzz Bomb< ramjet- which was a true rocket only while it's venetian blind-like valve was closed, a jet while it was open- an aviation Schroedinger's cat!
Picky
by peter_rat November 20, 2004 4:27 AM PST
Maybe "rocket/plane" ???
Is that better.

Pete
Reply to this comment
Picky
by peter_rat November 20, 2004 4:27 AM PST
Maybe "rocket/plane" ???
Is that better.

Pete
Reply to this comment
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