[USNBandit]

I had a statics professor at Annapolis that who had three pricipals of statics. The sum of the forces equals zero, the sum of the moments equals zero, and you can't push on a rope.

Pushing fuel up a hose seems a lot like pushing on a rope.

[ErnstStavroBlofeld]

If there is one military science organization to make it work its DARPA.

[ops33]

Isn’t that pretty much what firefighters do?