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- Newsgroups: sci.space
- Path: sparky!uunet!cs.utexas.edu!zaphod.mps.ohio-state.edu!darwin.sura.net!cs.ucf.edu!news
- From: clarke@acme.ucf.edu (Thomas Clarke)
- Subject: Pumpless Liquid Rocket?
- Message-ID: <1992Nov23.160859.9657@cs.ucf.edu>
- Sender: news@cs.ucf.edu (News system)
- Organization: University of Central Florida
- Date: Mon, 23 Nov 1992 16:08:59 GMT
- Lines: 50
-
- I was thinking about the problem
- of pumping in a liquid fuel rocket
- and wondered if there might be an
- alternative to fragile turbo pumps
- or heavy pressurized tanks.
-
- Consider:
-
- ______
- | |
- | |
- | | Tankage
- | | Depth D
- | | Area A
- \ /
- \ /
- ||
- ||
- || Connecting
- || Pipe
- || Length L
- ||
- _||_
- | | Thrust Chamber
- \ / Area T
- / \
- / \
-
- That is connect the tankage to the rocket engine
- with a long pipe. When accelerating (or at
- rest in a gravity field) hydrostatic pressure
- at bottom of pipe can be fairly high - like a
- water tower. I think if L/D > A/T, then
- the pressure caused by the acceleration should
- be sufficient to operate the engine with
- enough thrust to cause the acceleration to ...
-
- No pumps! Startup could be a problem though,
- especially in free fall. I envision sort
- of a flying water tower with the long pipe
- perhaps stiffened by guy wires as in a
- sailboat mast.
-
- Has this ever been tried?
-
- --
- Thomas Clarke
- Institute for Simulation and Training, University of Central FL
- 12424 Research Parkway, Suite 300, Orlando, FL 32826
- (407)658-5030, FAX: (407)658-5059, clarke@acme.ucf.edu
-