Quote:
Originally Posted by glend
Did you actually watch what he said? Do you know what a full laden jumbo jet weighs (a 747 can weigh 440 tonnes, and A380 much more), and how much of the earths resources go into making them? Regarding resources and pollution, compare a maybe ten minute launch burn with a jumbo jet burning jet fuel for 15 hours to get to the same place. The BRF ship has stubby winglets and a full length heat shield, powered descent burn is only used in the last few minutes for slowing and switching attitude to vertical landing. Do you know how many passengers the BRF ship can carry in that configuration? Lets get the facts straight before we burn this guy.
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But a BFR cannot load 440 passengers as an A380 or 747 or 777 can. And a rocket weighing several tons requires LOTS of energy to overcome the escape velocity of 11.2 km/s. Indeed it does not run 14 hours for a Dubai - Sydney flight, but the power used in that 10 minutes to lift those tons into orbit is a multiple of the takeoff power of a fully loaded A380.