simon_says wrote:
When you have a rocket that large it's not just the cost of the launch, it's the cost of buliding something worthwhile enough to launch on it. Payloads are more expensive than rockets. Apollo style missions were not going to fit NASA's declining budget so Apollo and the Saturn V were cancelled.
Currenly we are building another Saturn V class rocket. The SLS. It's first unmanned test launch should be in 2017. And the problem, once again, is that the big rocket takes up a large percentage of the budget. So the current mission planning revolves around things that cost as little as possible. There is no money for a moon lander or deep space long duration habitats. So NASA is currently looking for inexpensive mission concepts without coming out and directly saying that.
NASA figures that if they have a heavy-lift platform, missions will find them. It's the same strategy the management of the late 60s came up with re: the Space Transport System (STS), which became the
Columbia-class orbiter. Maintain the launch capacity at all costs, and a mission will find you. It ended up that they could'nt deliver on the performance promises, and lost out on the entire launch market. Then they were reduced to congress's largress, backed up by the millions of space junkies.
To this day, it's not clear if NASA's mistake was switching to a winged model before the technology was ready (it still is'nt), or the STS was really a desperate attempt to save heavy-launch capacity, and they had to spend the money before the entire space industry was scrapped.
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