This might be of interest...
Aircraft Tow Bars Two general classes of tow bars are used in naval aviation—those adaptable to only one type of aircraft and those adaptable to more than one type. The universal aircraft tow bar, Model ALBAR (Adjustable Length Towbar) (fig. 10-13) is the type of tow bar most commonly used by the Navy today. It is available in four different models and lengths. It is used to tow and position aircraft weighing up to 90,000 pounds. The ALBAR is designed for towing aircraft that have nose or tailwheel axle holes, or fuselage