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.
On Display at the 2025 Fall Fly In; Photo by G.R. Dennis Price – Aviation Photographer
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)
