As it was mentioned before, once everything is spinning at constant speed, one wheel isn't driving the other one anymore. They are just spinning on their own. And even then, there is tension in the chain.
Since you brought up the plane:
Yes, it will fly. I'm sure that they use parking brakes on them so they don't roll around the airport. So, if that plane is placed on the chain, the plane will move with the chain (along the flat part), and once the chain starts curving around the sprocket, the plane will keep moving forward and fly(assuming that it is going fast enough; if not, then the plane will just fall and crash).
Since you brought up the plane:
Yes, it will fly. I'm sure that they use parking brakes on them so they don't roll around the airport. So, if that plane is placed on the chain, the plane will move with the chain (along the flat part), and once the chain starts curving around the sprocket, the plane will keep moving forward and fly(assuming that it is going fast enough; if not, then the plane will just fall and crash).
This thread is very similar to the sprocket / chain system in question......it just goes round and round.
Anyway not even the perpetual motion argument works here because the links will try to fly off at a tangent. Removing all losses associated with friction will not remove all forces, i.e. the forces used to retain the chain links. These forces will eventually slow the system down ......unlike this thread.
Anyway not even the perpetual motion argument works here because the links will try to fly off at a tangent. Removing all losses associated with friction will not remove all forces, i.e. the forces used to retain the chain links. These forces will eventually slow the system down ......unlike this thread.
I am so, so sorry for what I did earlier. 
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