Dvice has post up titled: 4 Reasons why V's motherships don't make sense that is highly enjoyable. Enjoyable if for no other reason that I learned it would take 368 quadrillion joules of energy to propel a 3km-wide, 500m-tall steel ellipsoid 1000 meters into the air.
368 quadrillion joules! That's way more than 1.21 gigwatts!
How much is 368 quadrillion joules? About one and a half Tsar Bombas, the most powerful nuclear weapon ever detonated; or twice the total amount of solar energy hitting the earth every second.