and reduces Drag.
As your Rocket approaches the Sound Barrier, do you feel it's being held
back? Too much Drag? Are Aerodynamic Loads becoming troublesome? Dynamic
Pressure getting too high? Wind Loads causing problems? Has your Rocket
Accelerated too fast in the recent past, and are now feeling the need to
Throttle things back? But you can't, you build a Solid Rocket Motor that
only wants to go faster?
If any, or all of these problems are concerning you!
Well, then, Hydrogen is for you!
Injecting Hydrogen above the Nose Cone of a Rocket at the Sound Barrier in
air 343 m/s, will reduce the Mach Number from Mach 1 to only Mach 0.25.
Returning a rocket to Subsonic flight until it reaches the Sound Barrier of
Hydrogen at 1270 m/s. Turn off the Hydrogen, and the Mach Number jumps up
to Mach 4 in air. Hydrogen can eliminate the need to fly through the Sound
Barrier.
Max-Q, Dynamic Pressure is a simple equation. Q = 1/2 Density * Velocity
**2
Injecting Hydrogen above the Nose Cone of a Rocket will reduce Density and
Dynamic Pressure by 93%. The Density Ratio of Air/Hydrogen.
Drag = CoefficientOfDrag * DynmamicPressure * Area
Lift = CoefficientOfLift * DynamicPressure * Area
Wind loads or Lift also reduced by 93%.
So, don't worry that the Hydrogen Tank is Ten times bigger than an Average
Propellant Tank. Using the hydrogen properly reduces is't Drag by just as
much.
A Hyperloop in the Sky, Hydrogen, almost as good as flying in a Vacuum.
Actually, would work better than a vacuum for Tunnels and Trains as pipe
wall thickness become irrelevant and maintaining a slight over-pressure of
the Hydrogen gas is much, much easier to do than maintaining a thousand
mile long vacuum tube.
Adding Robert Goddard's first liquid-fueled rocket engine above the Nose
Cone and Propellant Tank works great if it uses a Hydrogen Mono-propellant.
https://en.wikipedia.org/wiki/Robert_H._Goddard#/media/File:Goddard_and_Rocket.jpg
Just be careful about "Flame Holders" at the tail end of the Rocket.
--
Craig Fink
WeBeGood@xxxxxxxxx
