The design features will be a fuselage of welded 4130 steel tubing, mated to an all-wood wing made from spruce. The struts and tail surfaces are made from 6061 T6 aluminium tubing. The flying surfaces will be covered with doped aircraft fabric. The rear fuselage is normally left as an open truss structure to save weight and to ensure that the aircraft does not exceed the FAR 103 maximum speed of 55 knots (102 km/h; 63 mph). Like the fuselage, the taildragger landing gear is sprung .