It shouldn’t be any surprise that airplanes of different nations made by different companies at different times have to be handled in different ways on the ground.

A peek in an FHC back room reveals a horde of unique towbars used on the planes. Each one pulls a certain aircraft (or maybe two). Interestingly, one of the smallest bars goes to the nose wheel gear of the big B-25 Mitchell. The biggest bar is for the P-47 Thunderbolt.

The most difficult to master is the towbar for the Polikarpov I-16, which features four slippery castering wheels.