I would think the acceleration would be too severe for most payloads, and more of an issue than friction and heat. Can you imagine the G-forces involved in being shot out of a cannon with sufficient muzzle velocity to escape Earth's gravity well?
I think the SCRAMjet idea has some merit, though.
We really could use something to lower the cost of getting to orbit.
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branchandroot
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Date: 2007-06-11 11:20 pm (UTC)I think the SCRAMjet idea has some merit, though.
We really could use something to lower the cost of getting to orbit.