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No need of heatshield and diving/gliding test on S2... can be a sing of an already well known grid fins landing approach ---> vertical reentry with some sort of decelerator, maybe inflatable cone, maybe partial deploy of kind of F9 legs?

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I think this is probably closer to it too, except the 3x structures on the outside will be large enough to house 3 engines each, and the payload will be moved aft... The more you think about it, the more sense it makes.

You could lower the whole cargo bay from the bottom, no cranes needed, for easy unloading when on the moon/mars.

So a monster-evolution of the t/space spiral 2 concept approx. 2004
https://en.wikipedia.org/wiki/T/Space#/media/File:Tspace_spiral2_final.png
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Space Science Coverage / Re: Mars sample return
« Last post by redliox on Today at 04:21 PM »
The decision made: Jezero Crater will be where MSR happens.
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I think all we know is:
It is visibly different
Tests planned with the Mini BFS on F9 are not needed anymore for the new design.
I don't think we know either of these things.
As one example, a BFS optimised for 'stage and a half' launch, with perhaps a 60 ton payload to orbit may not visibly differ, apart from perhaps minorly oversized RCS to the BFS we have been shown.
Mini BFS not becoming an operational second stage does not mean that there will be no tests with it. (or elements of it on a stock S2).

 
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Jezero Crater is the winner for site selection.
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I think all we know is:

1.
It is visibly different

2.
It is easier/faster

3.
Tests planned with the Mini BFS on F9 are not needed anymore for the new design.

For me this only makes sense if Elon can get rid of the "fins". And, moste likely, the extreme AOA at reentry.

So are we "back" to a 9m version of the ITS?

I think this is probably closer to it too, except the 3x structures on the outside will be large enough to house 3 engines each, and the payload will be moved aft... The more you think about it, the more sense it makes.

You could lower the whole cargo bay from the bottom, no cranes needed, for easy unloading when on the moon/mars.
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Are you saying it's like those "close door" buttons in a lift (elevator) - ie it doesn't actually do anything, apart from providing the occupant with something to do, so they feel involved?

They usually don't do anything in normal operating mode. Close door generally does work as advertised in fire service mode[0], attendant mode, and independent mode.

There's a metaphor here somewhere about experts needing to have overrides in certain situations...

-R C
[0] http://elevation.wikia.com/wiki/Fire_service_mode_(EFS)
http://elevation.wikia.com/wiki/Attendant_service_(AS)
http://elevation.wikia.com/wiki/Independent_service_(ISC)

PS: Don't know why I'm so surprised that there is an elevator wiki...
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Since he did say BFR not BFS.  I think they may be abandoning landing the booster back at the launch pad.  This "major change" to the booster would require legs, which may be the major change to the booster.  However it may speed up the booster construction, by using maybe 8 or so F9 legs.   

Far fetched, but they may go with a kerolox large booster and 60 Raptor engines on a shorter booster.
BFB (the booster) is the "easy bit" and I don't think Musk ever uses the "BFS" initialism. And if he does, he's not consistent with it.
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