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  Mercury - Gemini - Apollo
  Apollo 13: Passive Thermal Control (PTC)

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Author Topic:   Apollo 13: Passive Thermal Control (PTC)
Lunar Module 5
Member

Posts: 203
From: Wales, UK
Registered: Dec 2004

posted 08-25-2013 02:43 PM     Click Here to See the Profile for Lunar Module 5   Click Here to Email Lunar Module 5     Edit/Delete Message   Reply w/Quote
I am currently putting together the Apollo 13 full mission videos on YouTube.

I am now at approximately 81 hours into the flight - the PCC+2 burn has been completed, the lunar module has powered down and the crew are attempting to put the spacecraft into the Passive Thermal Control (PTC) mode.

Did they get the spacecraft rolling as per the usual way or did they rotate 90 degrees every hour or so? (They were using this method before the lunar flyby.)

I hope someone can help me out.

LM-12
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Posts: 848
From: Ontario, Canada
Registered: Oct 2010

posted 08-25-2013 05:00 PM     Click Here to See the Profile for LM-12     Edit/Delete Message   Reply w/Quote
There is this from the technical debriefing:

LOVELL: Okay. After PC plus 2, we did a PTC maneuver using PGNS. The procedure was called up by Houston and I can't really recall what it was. I don't have the checklist with me. After the burn, they gave us a method of using the PGNS to do a PTC maneuver. So, then they were going to shut down the PGNS.

Lunar Module 5
Member

Posts: 203
From: Wales, UK
Registered: Dec 2004

posted 08-26-2013 07:00 AM     Click Here to See the Profile for Lunar Module 5   Click Here to Email Lunar Module 5     Edit/Delete Message   Reply w/Quote
Thanks LM-12 - I will put the animations on to a PTC roll.

LM-12
Member

Posts: 848
From: Ontario, Canada
Registered: Oct 2010

posted 08-26-2013 10:09 AM     Click Here to See the Profile for LM-12     Edit/Delete Message   Reply w/Quote
Here is a link to the debriefing document. The quote is on page 9-5.

Lunar Module 5
Member

Posts: 203
From: Wales, UK
Registered: Dec 2004

posted 08-26-2013 01:38 PM     Click Here to See the Profile for Lunar Module 5   Click Here to Email Lunar Module 5     Edit/Delete Message   Reply w/Quote
Thanks LM-12, that has helped a lot.

All times are CT (US)

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