On Mar/13/2018 at 5:01 PM, JF Mezei wrote :
Does the ability to land on Earth absolutely imply the ability to take
off from Earth? (I know BFS is to be able to take off from Mars).

(I realise the prototype will be empty shell and much lighter so usable
for tests, just curious about whether the ability to take off from Earth
comes automatically with ability to land on Earth).

Not really. You land with the tanks nearly empty. If you have only
enough thrust to land with nearly empty tanks, you won't have enough
thrust to take off with tanks full.


Alain Fournier