A frame made of galvanised and painted hollow sections. It is covered with a galvanised and painted sheet; the top wall is covered with a dural sheet with slip-resistant treatment. The rigid rear axle is a component of the frame.
The front steered axle is housed in a ball race. Wheels with steel discs, integrated hubs and ball bearings are fitted with solid rubber tyres 4.00-8. The drawbar is terminated with an eye 40 mm in diameter. The front axle is equipped with a parking brake activated by lifting and securing the drawbar into a horizontal position. The tank and the outlet pipe are made of stainless steel.
It is equipped with a level gauge and an inspection aperture for easy cleaning, disinfection and inspection. For filling, it is equipped with a quick-acting "C" coupling and an overflow air-outlet. The water is pumped from the tank into the airplane with a stainless steel pump driven by an electric motor or a combustion engine through a filter. It is thermally insulated with expanded polystyrene.