How do I make bricks go along a conveyor belt?

I have made a plane- crash game and the plane uses a conveyor belt to fall down to earth, sadly, this does not work and it can only move me, not the plane.

I tried this: 
while true do
script.Parent.Velocity = script.Parent.CFrame.lookVector *20000
wait(0.1)
end

(For the force script) Somehow it doesn't move the plane but does move me.

Roblox obeys physics, just like the real world. And, likewise, the airplane is heavier than you. Either make the airplane more hollow, smaller, or make the conveyor belt velocity higher. Or both.

I don't see anything wrong with the script. Make sure the conveyor belt is anchored.