Linguofreak
Well-known member
Don't forget what would happen if it happened to enter Earths atmosphere...and didn't "land" properly... :suicide:
The original post didn't specify a mass. But, assuming that it is a rectangular block with dimensions 20 km * 5 km * 1 km, and that it has a density of 100 kg/m^3 (probably on the low side, considering that it needs some structural mass, and also that most cargoes will probably be denser than that), it will have a mass of 10,000,000,000,000 kg. This is equivalent to a 3 km diameter spherical comet, or a 2 km diameter asteroid.
If you had an accident a few seconds before touchdown, at low speed, it would be equivalent to dropping a mountain from whatever height you had your hover-engine failure at.
If you were in the late stages of re-entry, around 3 km/s or so, you'd be dealing with a Richter 7 earthquake at the impact point, and hurricane force winds at a distance of 100 km from the impact point.
If you were had a problem early in reentry and the impact velocity were closer to 8 km/s, you're talking a Richter 8 earthquake, and 400 mph winds 100 km away.
If someone hijacks the ship and rams it into an inhabited planet at 20 km/s (in this case it doesn't even need to be built to land), you get hurricane force winds 400 km away, as well as the heat from the fireball causing second degree burns at that distance and setting trees on fire.