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Posts by TranquilTempest

With a solid rocket booster, the entire wall of the booster is designed to contain the pressure of combustion. With a liquid fuel booster, it only really needs to hold tank pressure and axial loads.Basically, if you made F9 walls as strong as a SRB, it would weigh 5 times as much.
The same reason you can't do that with a 10 story building, it's just too big, and will be destroyed if tipped over onto it's side, even into water.
The big problem with the space shuttle was feature creep. If it stayed a small ship, similar to dream chaser, it would have been much more cost effective. But nasa flies at the whim of congress, so they had to tack on a bunch of stupid requirements and make the whole thing way bigger, less reliable, and more expensive than it had to be.
I don't think those space elevators will ever happen, too vulnerable to debris. As for Skylon, I'm still skeptical about them getting a useful payload to orbit. LH2 means massive fuel tanks, and equally massive heat shields to protect those tanks on reentry. I can definitely see it running into the same problems as the space shuttle.
Same distance we were 30 years ago. There aren't a lot of options for replacing chemical propulsion, but if I had a few hundred billion to spend on it, I'd try a launch loop. http://en.wikipedia.org/wiki/Launch_loopBasically it's a structure supported by it's own momentum, and allows the spacecraft to use earth based reaction mass and power, instead of carrying carrying the reaction mass as fuel. You still need chemical rockets(or ion engines) once you get into orbit.
I can think of both engineering and business reasons. I think a winged booster would have to fly backwards after separation(due to mass distribution), making it even more brick like than the space shuttle. There's a lot of mass in the wings and structure to support them, which you probably can't just leave off in order to lift heavier payloads. It's also difficult to add strap on boosters to get more payload capacity.I think the biggest reason is business related: you...
Better video: https://www.youtube.com/watch?v=lWrhAaDP9os
Touched down upright, but with too much horizontal velocity. Photos from barge: https://twitter.com/elonmusk/status/588082574183903232
Time for round 2: http://www.spacex.com/webcast/ http://livestream.com/spacex/events/3959775 https://www.youtube.com/watch?v=csVpa25iqH0 http://www.nasa.gov/multimedia/nasatv/ T- 27 minutes
You need zero extra hardware, all you need is the desire to test it, and an understanding of what happens every refresh vs what happens every frame. Just grab a game with a framerate cap that uses hardware cursor, and look at the distance between cursor updates.Basically, you can 'see' the timining each refresh by how far the mouse cursor moves in that amount of time. Just like this: http://www.blurbusters.com/mouse-125hz-vs-500hz-vs-1000hz/
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