Apollo extravehicular activity (EVA) start event

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Author	Topic: Apollo extravehicular activity (EVA) start event
Lou Chinal Member Posts: 1332 From: Staten Island, NY Registered: Jun 2007	posted 01-05-2013 12:19 PM What was the time an EVA was started? Did they go by when the lunar module was depressurized? When the hatch was opened? When they set foot upon the moon? To me the most important thing would be when you go on suit O2. But I have to admit I don't know.
Apolloman Member Posts: 152 From: Ledignan, Gard (30), France Registered: Mar 2009	posted 01-05-2013 12:42 PM In fact, there are two modes for calculating EVA on the surface of the moon. When the cabin is depressurized lunar module to its repressurization (we apply the same method of calculation for a spacewalk). Or when the astronaut actually pose foot on the Moon, until it ends up on the ladder of the LM.
LM-12 Member Posts: 3324 From: Ontario, Canada Registered: Oct 2010	posted 01-05-2013 12:48 PM The Apollo 15 Mission Report states that EVA begins when the cabin pressure reaches 3 psia during depressurization, and EVA ends when the cabin pressure reaches 3 psia during repressurization.
Apolloman Member Posts: 152 From: Ledignan, Gard (30), France Registered: Mar 2009	posted 01-05-2013 01:19 PM Uh-oh? Apollo by the Numbers: Extravehicular Activity From mission reports. Lunar surface EVAs are time outside LM. Others are based on start/stop times. Apollo 9 EVAs are from depressurization start to repressurization stop.

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