Author Topic: Apollo safety margins  (Read 517 times)

Offline deaville

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Apollo safety margins
« on: 11/21/2017 12:14 PM »
There were three possible ways to land and return men from the Moon - direct ascent, EOR (Earth Orbit Rendezvous) and LOR (Lunar Orbit Rendezvous). Eventually LOR was selected as the prefered method largely because it offered savings on the lift capability of the available launch vehicles.
This said, were any studies done to compare the inherent safety margins offered by the three methods mentioned above? Besides being the most achievable within the various constraints, was LOR also the safest way to meet Kennedy's target of returning the crew safely to Earth?
Light travels faster than sound, which is why some people appear bright until they speak.

Offline muomega0

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Re: Apollo safety margins
« Reply #1 on: 11/21/2017 12:44 PM »
There were three possible ways to land and return men from the Moon - direct ascent, EOR (Earth Orbit Rendezvous) and LOR (Lunar Orbit Rendezvous). Eventually LOR was selected as the prefered method largely because it offered savings on the lift capability of the available launch vehicles.
This said, were any studies done to compare the inherent safety margins offered by the three methods mentioned above? Besides being the most achievable within the various constraints, was LOR also the safest way to meet Kennedy's target of returning the crew safely to Earth?
Contingency planning is critical especially with the unknown unknown.

Apollo 13 showed that free return using less power dramatically improved crew safety.

In order to mitigate crew health effects, ~3 month vs 6 month trips to Mars have been proposed, but the faster trip time eliminates the free return and requires pre-positioned supplies.  This implies the system requires demonstrated reliability, and a substantially increased flight rate....so lets go 'mooning' with nominal 3 day trips.

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