The S-IC and S-II stages both had early Center Engine Cutoff (S-II a bit earlier than planned on 13) and I imagine "CECO" would be pronounced the same as "SECO".
Quote from: Jorge on 08/26/2009 08:02 pmThe S-IC and S-II stages both had early Center Engine Cutoff (S-II a bit earlier than planned on 13) and I imagine "CECO" would be pronounced the same as "SECO".Wasn't that called Inboard Engine Cut-off, IECO instead? At least on S-IC.
This is the SM-CM umbilical. I am sure it has a fancy name and acronym. It carries power, oxygen, commands etc. between the two modules. You don't want to run these lines through the heat shield and therefore go arround it.Analyst
Quote from: Analyst on 08/12/2009 08:30 amThis is the SM-CM umbilical. I am sure it has a fancy name and acronym. It carries power, oxygen, commands etc. between the two modules. You don't want to run these lines through the heat shield and therefore go arround it.AnalystWhere is this prior to launch? Is it rotated somehow? Or under a fairing? I ask because it does not seem like there would be room for it under the escape tower part that covers the command module. (I forgot the name of it at the moment!)Thanks.
sustainer and SECO applies only to classic AtlasSECO is used by Delta meaning second stage engine cutoffBut the term for SIVB on the Saturn V would be TECO. SECO would only apply to the Saturn IB
Quote from: jhf on 08/26/2009 06:51 pm Pure oxygen at 5psi is less of an issue than at the 19-some psi on Apollo 1 (14.7 psi + 5-ish).Apollo 1 was never at 19 psia. The issue was that is was at 100% O2 at sea level pressure prelaunch, which was suppose to be vented down to 5 psia on orbit.
Pure oxygen at 5psi is less of an issue than at the 19-some psi on Apollo 1 (14.7 psi + 5-ish).
Quote from: jhf on 08/26/2009 06:51 pm Pure oxygen at 5psi is less of an issue than at the 19-some psi on Apollo 1 (14.7 psi + 5-ish).Apollo 1 was never at 19 psia. The issue was that is was at 100% O2 at sea level pressure prelaunch, which was suppose to be vented down to 5 psia on orbit.It was changed to 60 N2/ 40 O2 , at sea level pressure prelaunch, which was vented down to 100% O2 at 5 psia on orbit.
Hello, Does anyone explain why during the communication between Apollo and the Houston control each communication start with a "bip" aht is the usage of this "BipKind RegardsBernard
Apollo 1 was most definately pressurized above atmospheric pressure. Since the CM was designed to endure outward pressure in the vacuum of space, the plugs-out test had been run with the cabin pressure at over 16 psi, almost 2 psi above the ambient sea level pressure at Launch Complex 34 and near the upper limits of measuring devices in the spacecraft.
Quote from: dks13827 on 08/01/2010 01:35 am Apollo 1 was most definately pressurized above atmospheric pressure. Since the CM was designed to endure outward pressure in the vacuum of space, the plugs-out test had been run with the cabin pressure at over 16 psi, almost 2 psi above the ambient sea level pressure at Launch Complex 34 and near the upper limits of measuring devices in the spacecraft.I may have the units (psi) wrong, but if I recall correctly, the CM was pressurized to 5 psi.
Since the atmosphere in the cabin was pure O2, this was equivalent to the partial pressure of O2 in earth's ambient atmosphere.
Hope someone can help with this. . .During ascent and entry in the Shuttle the CDR and PLT have push-to-talk buttons on their control sticks to open their microphones and transmit voice. During Apollo, how did the crew key their microphones? ICOM may have been VOX or hot mic, but A/G was not. Were there comm control units with push-to-talk buttons in the cables connected to the suits (we see these when they strap in the Shuttle crews and do comm checks)? Or another set-up?
Thanks for the prompt reply. I wasn't sure. How did the LMP transmit? Did he reach for the RHC in front of the CMP, or did he have another way to key his mic?
I recently discovered that the Apollo SM main engine could gimble. I'm curious where the need for this would be, and where/how it was used.