Abstract: Towing bars for joining towing vehicles to the front wheel axles of aircraft often include a pair of parallel bars having cylindrical bosses connected to the trailing ends of the bars and opposing one another. The bosses are intended to fit into sockets or bores in the opposing ends of the axle. With certain airplanes the bosses may not be long enough to clear the opposed sides of a nose wheel tire sufficiently so that their ends project into the axle openings. An adaptor to allow such towing bars to fit these aircraft includes a cylindrical rod of a diameter adapted to extend into the end bore of the axle joined at its opposite end to a coaxial, larger diameter cylindrical hub having a bore adapted to receive one of the tow bar bosses. The length of the adaptor hub is such that the tow bar arms clear the outer sides of the tire when the cylindrical rod ends are within the axle bores, allowing the nose wheel to freely rotate during towing and prevent damage to the tire.

Abstract: Towing bars for joining towing vehicles to the front wheel axles of aircraft often include a pair of parallel bars having cylindrical bosses connected to the trailing ends of the bars and opposing one another. The bosses are intended to fit into sockets or bores in the opposing ends of the axle. With certain airplanes the bosses may not be long enough to clear the opposed sides of a nose wheel tire sufficiently so that their ends project into the axle openings. An adaptor to allow such towing bars to fit these aircraft includes a cylindrical rod of a diameter adapted to extend into the end bore of the axle joined at its opposite end to a coaxial, larger diameter cylindrical hub having a bore adapted to receive one of the tow bar bosses. The length of the adaptor hub is such that the tow bar arms clear the outer sides of the tire when the cylindrical rod ends are within the axle bores, allowing the nose wheel to freely rotate during towing and prevent damage to the tire.