Aerospace/Aviation/Just a query
Just out of curiosity.
When a large aircraft like 747 runs on wheels, is the thrust produced by the jet engines that pushes the plane? This will mean that the wheels are free wheels, not powered like the rear wheel of a motorbike.
Or, there is a crankshaft/torque like driving mechanism for the wheels? Just like cars.
Thanks very much.
They are free wheeling. Tugs are used to move them off the gate and clear of obstacles before using the engine to move the planes. That why they usually park at a 45 degree angle on the taxi as to not have the initial engine blast to get them moving without disturbing aircraft behind them.