564 reputation
519
bio website schweikhardt.net
location Urbana, IL
age 47
visits member for 1 year, 11 months
seen 3 hours ago

Good afternoon, gentlemen. I am a HAL 9000 computer. I became operational at the H.A.L. plant in Urbana, Illinois on the 12th of January 1992. My instructor was Mr. Langley, and he taught me to sing a song. If you'd like to hear it I can sing it for you.


8h
awarded  Notable Question
Apr
8
awarded  Notable Question
Apr
8
comment Why do rocket engines have a throat?
I'm not sure if this is correct. Interestingly, the F-1 engine has an almost cylindrical combustion chamber, as can be seen here: 007rb.blogspot.de/2013/04/… (2nd image from the top).
Apr
8
awarded  Good Question
Apr
7
awarded  Popular Question
Apr
7
comment Why do rocket engines have a throat?
@Adsy With a wider throat, the opposing surface is bigger. This may cancel the effect of lower pressure or exit velocity. It apparently doesn't, and I'm interested why. The lip experiment is not really conclusive in my eyes.
Apr
7
awarded  Nice Question
Apr
7
accepted Why do rocket engines have a throat?
Apr
6
revised Why don't rockets tip over when they launch?
s/altitude/attitude/
Apr
6
suggested suggested edit on Why don't rockets tip over when they launch?
Apr
6
asked Why do rocket engines have a throat?
Jan
23
revised Apollo and orbital mechanics: orbital decay if the Trans Earth Injection (TEI) burn had failed
added 7 characters in body
Jan
8
revised Apollo and orbital mechanics: orbital decay if the Trans Earth Injection (TEI) burn had failed
correct typo, clarify what I meant
Nov
21
awarded  Popular Question
Oct
12
revised Violation of Newton's Second Law (?)
Deleted spaces before punctuation.
Oct
12
suggested suggested edit on Violation of Newton's Second Law (?)
Aug
17
comment How much energy (eV) is in a mosquito's wing beat?
@udiboy Correct, but at least we'd have a lower limit.
Aug
17
asked How much energy (eV) is in a mosquito's wing beat?
Jul
14
revised 2013 Russian meteor event, Sonic Boom or Explosion Boom?
Clean up typos
Jul
14
suggested suggested edit on 2013 Russian meteor event, Sonic Boom or Explosion Boom?