BobG's latest activity
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A piece of string walks into a bar and orders a drink. The bartender points to a sign behind the bar that says NO STRINGS ALLOWED... -
BobG reacted to Filip Larsen's post in the thread Escape velocity is a constraint due to limited fuel? with
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As you mention, thrusting directly against gravity means thrust worth of around 1G (at surface) will be lost per second and this is... -
BobG reacted to Filip Larsen's post in the thread Escape velocity is a constraint due to limited fuel? with Like.
The escape speed is the speed an orbiting object needs at a particular distance from the planet it orbits in order for that orbit to be...
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BobG replied to the thread Can ionic thrusters be used as a secondary propulsion system for rockets?.Yes, they can, provided the spacecraft at least reached space. They have been used as a secondary propulsion system when the chemical...