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Entry/Egress from BFS on Mars
"JF Mezei" wrote in message ... At KSC, they'll have a nice tower, elevator, and air conditioned arm to bring people between the tower and the BFS/Starship. What about when it lands on Mars? Do they just open the door high up, and unroll a rope ladder to the ground and hope that ladder stays on so they can one day climb back onto the ship? Just curious if a flexible ladder over such a long distance would be viable? If they need attach points for latter at regular intervals, would such present aerodynamic challenges for take off/Landing or be small enough to be a no brainer? (for re-entry, such attach points would conduct heat to the structure under heat shield would they not? I assume there would be a floor for cargo with its own hatch, and arm that can be extended out and a winch to lowr pallets to the ground? I wondered about the same thing. What if the elevator breaks down when they're on the surface. How are they going to climb back up into the habitable section? Are there emergency stairsteps in the side of the rocket? |
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Entry/Egress from BFS on Mars
On Sep/21/2019 at 12:25, Rocket Man wrote :
"JF Mezei" wrote in message ... At KSC, they'll have a nice tower, elevator, and air conditioned arm to bring people between the tower and the BFS/Starship. What about when it lands on Mars? Do they just open the door high up, and unroll a rope ladder to the ground and hope that ladder stays on so they can one day climb back onto the ship? Just curious if a flexible ladder over such a long distance would be viable? If they need attach points for latter at regular intervals, would such present aerodynamic challenges for take off/Landing or be small enough to be a no brainer? (for re-entry, such attach points would conduct heat to the structure under heat shield would they not? I assume there would be a floor for cargo with its own hatch, and arm that can be extended out and a winch to lowr pallets to the ground? I wondered about the same thing. What if the elevator breaks down when they're on the surface. How are they going to climb back up into the habitable section? Are there emergency stairsteps in the side of the rocket? That's a very minor problem to solve. But the thing is, there are many such minor and a little less minor problems to solve before they can send humans to Mars. SpaceX seems to be solving the main issue of building a suitable rocket. But I don't see much going on about all the other things. Oh, some people will talk about designing space suits for Mars, and things like that. But talk is cheap. I'm not aware of anyone working on actually making a space suit for Mars. My hope is that after the SpaceX presentation next week in Boca Chica, a human mission to Mars will start looking quite real enough that serious work will start on all those little things. Still, I think that at some point, SpaceX will have a vehicle ready to send humans to Mars, but an actual mission will have to wait until some relatively minor details are worked out. Alain Fournier |
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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. -- Niklas Holsti Tidorum Ltd niklas holsti tidorum fi . @ . |
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Entry/Egress from BFS on Mars
"Niklas Holsti" wrote in message ...
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. This is almost certainly how they will do it. If for some reason they want everyone on the surface, simply rig a crane with a rope before you leave. Even worst case, you can build a haul system so on astronaut can lift another up to the door. As Niklas points out there are multiple solutions that can easily solve this. 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. Ayup. -- Greg D. Moore http://greenmountainsoftware.wordpress.com/ CEO QuiCR: Quick, Crowdsourced Responses. http://www.quicr.net IT Disaster Response - https://www.amazon.com/Disaster-Resp...dp/1484221834/ |
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Entry/Egress from BFS on Mars
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Entry/Egress from BFS on Mars
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