Lowest Stable Low Earth Orbit?

Cool, thanks! I CAN do math myself, but not if I can avoid it, heheh. Mmm, that's pretty fast for bullets (re. the short story I mentioned). Two to three times your average riffle bullet, but then, it was SF.

Hans
 
What would be the fastest reasonable time for a forced orbit of Earth? (ie upside down, accelerating downwards to counteract inertial slingshot effect and probably unconscious)?

Puck could throw a girdle about the Earth in 90 minutes I seem to recall. Nasa could beat that, but what if we were seriously pushing for a record?
 
That would not be an orbit, that would be a powered flight.

Using present technology: Impossible. The amount of fuel you needed to bring would be forbidding.

Using Sci Fi technology: Anything is possible.

Hans
 
Skeptoid said:

Okay, using the equation for orbital velocity, V<sub>o</sub> = (GM/R)<sup>1/2</sup> (which is equivalent to the equation you used), I get 3554m/s for a small mass orbiting at Mars' surface. But I'm getting 1.66 hours per orbit. I think you forgot to double the radius when you calculated Mars' circumference.
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Agreed. I just used your 3554m/s value and got 1.67 hours.
 
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