The Bathtub was developed by Etienne Dormoy, a French engineer at McCook Field in Dayton, Ohio as a simple low-cost and ultra-light aircraft. Dormoy would later design the Buhl Bull Pup.
The Dormoy Bathtub competed in the 1924 and 1925 National Air Races, winning the Rickenbacker Trophy in 1924. The 1925 model featured a fully covered tail section, removing its “bathtub” appearance.
General characteristics
Length: 13 ft 5 in (4.09 m)
Wingspan: 24 ft (7.3 m)
Wing area: 85 sq ft (7.9 m2)
Gross weight: 425 lb (193 kg)
Fuel capacity: 2 US gallons (7.6 litres)
Powerplant: 1 × Heath-Henderson B-4 , 20 hp (15 kW)
Cruise speed: 61 kn (70 mph, 110 km/h)