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Systems for propelling a spacecraft from one place to another, such as rockets.

5 votes

Hypothesized parameters of reactionless drives

For the EM-Drive, the disparity comes from the test results of the different test apparati. at least 5 test run versions have been made: — The 2 test rigs by the developer — The Chinese replication …
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4 votes

What limits the speed of space probes currently?

Simply put: Fuel and drive efficiency. There is a maximum amount of vector change possible based upon the fuel load aboard, and the efficiency of the drive in converting that fuel into a change of ve …
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13 votes

Could a ship take off from Earth using ion thrusters?

Ion thrusters of current designs would short out the charged grid in surface level atmosphere. Current generation ion thrusters rely upon a difference in charges ionizing and then attracting the rea …
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17 votes

Can a rocket motor be shut off after ignition?

Liquid fueled Most (almost all, but not all) are configured for both shut-off and restart. Some early liquid fueled rockets could not be shut off - they were "gravity fed," and once under acceleration …
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1 vote

Could India Send a Lander to Mars?

India has the lift capacity, as evidenced by their recent mars probe launch. A small rover could be less mass than the orbiter they sent, which has a laden mass of about 515kg. ❸ Further, India has …
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21 votes

Is warp drive a legitimate avenue of scientific investigation?

Original Answer Given Alcubierre's math, and White's calculations, it's a viable avenue of research to pursue. Whether or not it is practical as FTL, and given the expected maximum apparent speed of a …
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