The model represents aeroplane no. A5141 which was one of four pre-production aircraft, the final production type being the M1c.
Fuselage is a fabric-covered spruce framework.
Fabric covering is doped nylon. The large spinner is moulded from glass cloth and polyester resin. During turns, the model has a tendency to raise its nose one way and drop it the other. This is believed to be a gyroscopic reaction caused by the rotating mass of the large spinner, rather like the effect on the full-size of the rotary engine, but to a much lesser extent. Click Here for Bristol M1b merchandise.