Will it fly?

[G.Irish]

Uh yeah I'm with Kaan. If the wheels just spin and the treadmill keeps the plane in place, no air is being forced underneath to create lift. It's just sitting there making the treadmill go faster and faster. It would be like putting a Corvette ZR1 on a lake of ice. You could mash the go pedal as much as you want, all you're going to get is a ton of exhaust gas and some melted ice.

Now think about the same Corvette with a jet engine on the back. The jet engine doesn't need traction to propel the car forward so regardless of whether the wheels have traction it will push the car forward.