Will SpaceX borrow half of the Sea Dragon idea?SpaceX has talked about making their rocket sea-water resistant. When I was picturing the fully-reusable future SpaceX launcher, I was picturing a first stage which after separation, turns around, re-ignites some or all of its engines with residual fuel, and boosts back to the launch pad for a propulsive landing. Might SpaceX instead just propulsively slow it down above the ocean enough to slip in without sustaining damage, to be pulled up, perhaps by an amphibious erector tower or tow-cable to be taken back to the pad? Is one of the reasons for building a new Texas pad a range rule against boosting your stages back in the direction of a Florida pad?
Sea Dragon is not needed. It's $300 per kg to orbit in 1963 is $2160 per kg in 2011 dollars, which means it would be competing with Russian rockets (Zenit) and Falcon Heavy on a cost per kg basis.
Why was Sea Dragon so much more efficient at BEO?
Aerojet did some fantastic engine work and doesn't get the credit like the bigger boys LM, Boeing etc.
Wait till you see the finished performance of the AJ-500.
SD was proposed before the F-1 got on the test stand and revealed the problems with large engines and combustion instability. The guarantee of combustion instability on a single-bell 80 million pound thrust first stage engine, or a 7 million pound thrust upper stage engine is simply ridiculous.
The cost is also prohibitive. How expensive was the 1 million pound thrust RS-84 was going to be? How expensive is the quarter-million pound thrust J-2X? Warp drives would be cheaper to develop than an 80 million pound single-bell engine.
That amount of power in the ocean will kill everything within miles. Environment groups will make it illegal long before the first test flight ever came close.-MP.
If you change Sea Dragon to use an aerospike, it's almost Direct P2.
Quote from: Jason1701 on 08/02/2011 02:03 PMIf you change Sea Dragon to use an aerospike, it's almost Direct P2.sHaha, it looks like I needed to pay more attention to what Ross, Chuck, et al are up to these days. So is this what C-Star is doing?