4 ms·

With no lifting surfaces?

• trhway 6y ago
  very napkin as we don't know how good their engines are. For small and thus low efficient jet engines - with exhaust velocity of anywhere between 500-1000m/s and with the 1:50 fuel/air ratio one has to burn 40-80g/s to get 200kg thrust. Thus a 1000s of flight takes 40-80kg of fuel.