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  Mercury - Gemini - Apollo
  Post-Apollo 13 hardware, procedure changes

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Author Topic:   Post-Apollo 13 hardware, procedure changes
mjanovec
Member

Posts: 3794
From: Midwest, USA
Registered: Jul 2005

posted 09-16-2007 05:52 PM     Click Here to See the Profile for mjanovec   Click Here to Email mjanovec     Edit/Delete Message   Reply w/Quote
In viewing a PBS documentary on Apollo 13, I couldn't help but wonder if changes were made to either of the following for missions after Apollo 13:
  1. Was there any redesign of the LiOH canisters to allow them to be interchangeable between the LM and the CSM? Or, assuming that perhaps the canister receptacles couldn't be re-designed in time, was there any sort of "adapter kit" placed on board the spacecraft, so that in another Apollo 13-like situation, the astronauts wouldn't have to re-build the adapter that was built on board Apollo 13?

  2. Were procedures developed for shutdown and re-start of the command module during flight that would allow an Apollo 13-like restart with minimal power? Or, at the very least, were the procedures carried out on board Apollo 13 included in flight manuals carried on future flights?

  3. For the mid-course correction burn, were procedures included in future manuals for doing an Apollo 13-like burn using the Earth's terminator as a point in which to use as a reference for the burn? I seem to recall Lovell saying this was a procedure they trained for on Apollo 8, but that training for this maneuver for post-Apollo 8 missions was not included. Is it safe to assume this procedure was re-introduced for training future Apollo crews?

  4. Was simulator training expanded to include situations where one would fly the LM with the CSM attached? Lovell reported that he essentially had to re-learn how to fly in this configuration, so it would seem that this configuration was not included in training before... or was not correctly simulated, if it was.

Max Q
Member

Posts: 399
From: Whyalla South Australia
Registered: Mar 2007

posted 09-17-2007 06:22 AM     Click Here to See the Profile for Max Q   Click Here to Email Max Q     Edit/Delete Message   Reply w/Quote
I may be wrong but I do seem to remember reading an extra fuel cell was installed in later service modules.

Sy Liebergot
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Posts: 501
From: Pearland, Texas USA
Registered: May 2003

posted 09-17-2007 12:04 PM     Click Here to See the Profile for Sy Liebergot   Click Here to Email Sy Liebergot     Edit/Delete Message   Reply w/Quote
CSM hardware changes post-Apollo 13:
  • SM: Additional cryo O2 tank that could be isolated to supply crew only.
  • SM: All cryo tank fans/wiring removed.
  • SM: Cryo tank heater tube changed from AL to SS and thermostats removed.
  • SM: A 400 amp-hour LM Descent Stage Battery.
  • CM: Water storage bags added.

robsouth
Member

Posts: 769
From: West Midlands, UK
Registered: Jun 2005

posted 09-17-2007 11:18 PM     Click Here to See the Profile for robsouth     Edit/Delete Message   Reply w/Quote
I think they put some blankets in the CM too because the Apollo 13 guys felt the cold.

Jay Chladek
Member

Posts: 2272
From: Bellevue, NE, USA
Registered: Aug 2007

posted 09-18-2007 01:19 AM     Click Here to See the Profile for Jay Chladek   Click Here to Email Jay Chladek     Edit/Delete Message   Reply w/Quote
Did they also go through the CSM to see if there were any other systems built to the original lower voltage spec that might cause problems if hooked up to the higher power launch pad voltage (such as what happened to fuse the thermostat in Odyssey's O2 tank)?

Sy Liebergot
Member

Posts: 501
From: Pearland, Texas USA
Registered: May 2003

posted 09-18-2007 10:25 AM     Click Here to See the Profile for Sy Liebergot   Click Here to Email Sy Liebergot     Edit/Delete Message   Reply w/Quote
The 65 vdc was just for the cryo heaters only to hasten tank pressurization. (See the Apollo 14 press kit, pages 94-97, for spacecraft changes.)

Jay Chladek
Member

Posts: 2272
From: Bellevue, NE, USA
Registered: Aug 2007

posted 09-18-2007 02:03 PM     Click Here to See the Profile for Jay Chladek   Click Here to Email Jay Chladek     Edit/Delete Message   Reply w/Quote
So without the thermostat on the new tanks, there would be nothing to short out or fuse then. Thanks!

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