Return-path: X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson Received: from beak.andrew.cmu.edu via trymail for +dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl@andrew.cmu.edu (->+dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl) (->ota+space.digests) ID ; Thu, 31 May 1990 02:45:59 -0400 (EDT) Message-ID: Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Thu, 31 May 1990 02:45:36 -0400 (EDT) Subject: SPACE Digest V11 #471 SPACE Digest Volume 11 : Issue 471 Today's Topics: Saturn V: Center S-I Engine shutdown? IMAX in LA area ---------------------------------------------------------------------- Date: 30 May 90 17:05:05 GMT From: usc!elroy.jpl.nasa.gov!zardoz.cpd.com!dhw68k!ofa123!Mark.Perew@ucsd.edu (Mark Perew) Subject: Saturn V: Center S-I Engine shutdown? Charlie Duke, LM Pilot for Apollo 16, has a biography out now and in the beginning of the book he describes his Apollo 16 launch. Part of this section tells how the center first stage engine (S-I?) shutdown as planned while the other four continued running until staging occured. I have never heard of this before. I am a bit puzzled as to why the first stage would have been designed to work this way. However, I have managed to come up with two possible reasons. First, that the engine was shutdown for the passage through Max-Q and that the S-I (unlike the S-IVB) was not restartable. Second, that sufficient propellant mass had been used that the thrust to weight ratio would have turned the crew into hull pizza if they didn't shut down an engine. Of course, I wonder if the second is correct if the equivalent result couldn't have been acheived by throttling the engines down. But, I seem to recall reading somewhere that these particular engines were not throttleable. I also suspect that they may have had a peak specific impulse over a very narrow performance range. How close am I? ===================================================================== Warning: Never, never, never listen to Tchaikovsky's Concerto in D, Opus 35 while reading sci.space. The imagery overload is guaranteed to fry your synapses. :-) ===================================================================== --- Opus-CBCS 1.12 * Origin: Universal Electronics, Inc. (1:103/302.0) -- uucp: Mark Perew Internet: Mark.Perew@ofa123.fidonet.org BBS: 714 544-0934 2400/1200/300 ------------------------------ Date: 30 May 90 17:20:05 GMT From: usc!elroy.jpl.nasa.gov!zardoz.cpd.com!dhw68k!ofa123!Mark.Perew@ucsd.edu (Mark Perew) Subject: IMAX in LA area There has been so much talk about IMAX theaters overseas that I though I would take a moment to inform/remind the readership that the Mitsubishi IMAX Theater is part of the California State Museum of Science and Industry. The museum is adjacent to the Coliseum. Admission price is $5.00 for adults and $3.75 for kids, students, and seniors. They have 4 IMAX movies available: The Dream is Alive Race the Wind To The Limit Kronos I haven't seen the last three, but I saw _The_Dream_Is_Alive_ again and it is every bit as good as I recall it being when I saw it last year at KSC. Just FYI I am not affiliated in any way with any of the above named places, companies, or groups. That being so I can give my hearty recommendation to visiting the museum if you should happen to be in the area. --- Opus-CBCS 1.12 * Origin: Universal Electronics, Inc. (1:103/302.0) -- uucp: Mark Perew Internet: Mark.Perew@ofa123.fidonet.org BBS: 714 544-0934 2400/1200/300 ------------------------------ End of SPACE Digest V11 #471 *******************