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Old June 29th 20, 12:42 PM posted to sci.space.policy
Dean Markley
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Default The Rocket Motor of the Future Breathes Air Like a Jet Engine

On Sunday, June 28, 2020 at 11:49:29 PM UTC-4, Doctor Who wrote:
On 6/28/20 9:54 AM, JF Mezei wrote:
On 2020-06-27 18:19, wrote:

space cheap enough for the rest of us. While a conventional rocket engine must
carry giant tanks of fuel and oxidizer on its journey to space, an air-breathing
rocket motor pulls most of its oxidizer directly from the atmosphere.



*Most* of its oxydizer?
Until what altitude is there enough air to run a rocket engine?
How long out of the roughly 8 minutes for first stage engine firing does
it take to reach that altitude?

Could such an engine be efficent when what it breathes in is 80%
nitrogen and 20% oxygen?

Would such an engine have both a LOX turbopump as we know it, and a
separate one that pushes gaseous air into combustion chamber? (with the
LOX turbopump activated once a certain altiutude is reached.

Is it theoretically possible to design the injectors and combustion
chamber to handle both gaseious pure oxygen at high pressure (after
pre-burner) and gaseous mix of nitrogen and oxygen (air) ?





there is no future for rocket motors, after PNN will be patented all
rocket motors will look like toys.


There is also no future for trolls named after fictional scifi characters.