This object is on display in the Boeing Aviation Hangar room at Steven F. Udvar-Hazy Center in Chantilly, VA.
Collection Item Summary:
The Heath Airplane Company's Model B-4 was an in-line, four-cylinder, air-cooled Henderson motorcycle engine converted for use in aircraft by modifying the lubrication system and the valves. The B-4 mainly powered the small and economical Heath Parasol monoplane, which Heath sold in kit form for homebuilders in the 1920s and '30s.
The low-cost, reliable Henderson motorcycle engine was well-suited for the Heath airplane design because it helped make sport flying affordable for many people. Service was simple and economical because parts were cheap and easy to obtain throughout the country.
Collection Item Long Description:
National Air and Space Museum
Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum
Gift of Eugene E. Stegall.
Length 64.1 cm (25.25 in.), Width 36.8 cm (14.5 in.), Height 61 cm (24.0 in.)
See more items in
National Air and Space Museum Collection
Country of Origin
United States of America
- Type: Reciprocating, In-line, 4 cylinders, air cooled
- Power rating: 22.4 kW (30 hp) at 3,000 rpm
- Displacement: 1.4 L (83 cu in)
- Bore and Stroke: 70 mm (2.8 in.) x 89 mm (3.5 in.)
- Weight: 54 kg (119 lb)
PROPULSION-Reciprocating & Rotary