Hudlass was a motorcycle prouced in 1920 by F. Hudlass, who was an engineer for the RAC.
The popular Auto Wheel was adapted to produce this machine so that it took the place of the normal rear wheel and was sprung from the main frame. The front forks were sprung by a combination of compression and rebound springs. Apart from that, it was a very simple machine.
Hudlass tried to source a manufacturer for his project but was unable to find one, so it came to nothing. It is thought that the Autosco and Witall scooters of the 1920s may owe something to the Hudlass design.