Merrill and money man Harry Richman loaded the Vultee’s wings with 41,000 ping-pong balls hoping that if they had to ditch in the vast Atlantic, the balls would keep them afloat. National Air ...

Rather than go the magnetic route, [Jacob] levitated a ping-pong ball on a cushion of air. Now, it would be possible to cheat here, anyone who’s seen a demonstration of Bernoulli’s principle ...

Just like a rocket engine nozzle, this bit of machined PVC compresses the air coming through the burst duct tape seal and allows it to expand again, propelling the muzzle-loaded ping pong ball at ...