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Old September 22nd 19, 09:56 AM posted to sci.space.policy
Niklas Holsti
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Default Entry/Egress from BFS on Mars

On 19-09-22 09:51 , JF Mezei wrote:
On 2019-09-21 15:33, Alain Fournier wrote:

That's a very minor problem to solve.


And there were many suggestions posted, when this thread originally
appeared.

Having a ladder stick out of fuselage isn't "minor" when you have to
consider entry aerodynamics.


So don't do it. Have two or more doors and cranes for redundancy. Leave
some crew on board at all times to be on hand to solve problems.

And remember that SpaceX plans to send at least two ships at a time to
Mars, so there is a spare ship, even.

This may be a "minor" aspect in the big picture, but consider for
instance if they require to have some permanent recessed hook below
doors to which a ladder can be attached. That area can't have
"transpiorational" cooling [...]

Same thing with the doors, whether human or cargo. Will they get
transpiration cooling? [...]


Put the doors on the lee side, where it seems heat shielding is much easier.

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Niklas Holsti
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