avia.wikisort.org - Engine

The Heath-Henderson B-4 engine was a motorcycle piston engine modified for use in aircraft.

Heath-Henderson B-4
Heath-Henderson B-4 aircraft engine on display at the Steven F. Udvar-Hazy Center
Type	Piston aero engine
National origin	United States
Manufacturer	Heath-Henderson
First run	1930?
Major applications	Heath V Parasol

"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."

• A Heath-Henderson engine was featured on an episode of the television show American Pickers, first airing on December 12, 2011 in the U.S. A brief history of both the Henderson motocycle company and use of the engine in Heath aircraft was discussed.

Variants

• Church Marathon J-3

The Marathon J-3 was a modification of the Heath-Henderson B-4 engine, used for light aircraft in the 1930s, by the Church Airplane and Mfg. Co, primarily for the Church Midwing JC-1.[1] The Marathon J-3 cost $350 in 1932.

Applications

• Church Midwing JC-1
• Doromy Bath Tub
• Heath Parasol

Engines on display

• There is a B-4 on display at the New England Air Museum, Bradley International Airport, Windsor Locks, CT.[2]

Specifications

Data from Jane's all the World's Aircraft 1938[3]

General characteristics

• Type: 4-cylinder, air-cooled inline piston aircraft engine
• Bore: 2.75 in (70 mm)
  

(Marathon J-3 - 2.806 in (71 mm))^{[citation needed]}

• Stroke: 3.5 in (89 mm)
• Displacement: 83 cu in (1.4 l)
  

(Marathon J-3 - 108 cu in (1.77 l))^{[citation needed]}

• Length: 25.25 in (641 mm)
• Width: 14 in (356 mm)
• Height: 25 in (640 mm)
• Dry weight: 109 lb (49.4 kg)

Components

• Valvetrain: side valves worked by camshaft
• Cooling system: air-cooled

Performance

• Power output: 30 hp (22 kW) at 3000 rpm

(Marathon J-3 - 46.5 hp (34.7 kW))^{[citation needed]}

• Compression ratio: 4.6:1

Notes

References

• This article contains material that originally came from the placard at the Steven F. Udvar-Hazy Center.

External links

• "Heath-Henderson B-4 In-line Engine". Smithsonian National Air and Space Museum. Retrieved 1 January 2011.

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