Apollo in Real Time Forum

Message Boards => Apollo 13 Moments of Interest => Topic started by: MadDogBV on June 17, 2024, 08:40:27 am

Title: 107:05:24 Exasperated FIDO and RETRO grill CONTROL on SHe tank
Post by: MadDogBV on June 17, 2024, 08:40:27 am

CONTROL Larry Strimple is working his second mission in the MOCR after having been backroom support in the LM SSR for several missions. Maroon Flight Milt Windler has just floated the very, very undesirable prospect over the flight loop of having to periodically (every hour on the hour) fire a 10-second ullage of the DPS in order to alleviate the supercritical helium tank. Obviously, this would wreak havoc on the spacecraft's trajectory, since Aquarius is currently on what is essentially a free-return trajectory with no PGNS, no AGS, and very little tracking data.

It seems CONTROL isn't as worried about this as the rest of the flight controllers are, as FIDO Bill Boone and RETRO Tom Weichel give Larry a taste of just how hard it is to be a flight controller during an anomaly situation.

Link: https://apolloinrealtime.org/13/?t=107:05:24&ch=20 (https://apolloinrealtime.org/13/?t=107:05:24&ch=20)

Title: Re: 107:05:24 Exasperated FIDO and RETRO grill CONTROL on SHe tank
Post by: MadDogBV on July 11, 2024, 07:43:12 am

A follow-up post for those who were interested in the actual nitty-gritties of how the flight controllers were planning to mitigate the SHe problem. Here's a briefing from Jay Greene to the SELECT on duty (John "Al" Layton) at 107:45 GET:

Link: https://apolloinrealtime.org/13/?t=107:45:53&ch=20 (https://apolloinrealtime.org/13/?t=107:45:53&ch=20)