G’day Crandell,
A lot of locos throughout the world have a screw reverser, operated by a handwheel, as opposed to the lever reverse that many US locos have. The idea being that more precise adjustments to cut-off could be made than with a lever, and that the mechanical advantage made moving the valve gear easier in the days before power reversers were developed.
(Having run locos with both types of reverser, I can’t say I have a clear preference for one or the other. Lever reverse is bloody marvellous when you’re shunting, but screw reverse has a better “feel” when you’re out on the road and running at speed.)
But in the case of the locos in the movie “The Train”, I’d have to look at the movie again before I’d make a comment. IIRC, at least one of the locos Burt Lancaster drove was a compound 4-6-0, and in typical French fashion it had two reversers, so the that the HP and LP cutoff could be adjusted independently.
(EDIT) The locos seen in the film were former Est engines, somewhat modified when they taken over by the SNCF. In modified form they had one reverser wheel operating the two reach rods, with a change lever fitted to the screw for independent adjustment, or the HP/LP cutoff could be operated together.
There are also fairly substantial handwheels for the injector steam ranges, compressor stop valve, blower, feedwater heater pump, and the main steam stop valve - the “turret” in NA terminology.
FWIW, I believe that Mr Lancaster was actually taught the basics of firing and driving for his role in the movie. Some years back I was talking to Doyle McCormack of SP 4449 fame, and he commented that Mr Lancaster seemed quite at home on the loco during the filming of “Tough Guys”.
Anyway, when I get a chance I’ll have a look at the movie, and post again with