Better Half VW

The Better Half VW is an American aircraft engine, designed by Leonard Milholland of Brookshire, Texas in 1993 for use in ultralight aircraft. The engine is supplied in the form of plans for amateur construction.[1][2]

Better Half VW
Type Aircraft engine
National origin United States
Manufacturer Better Half
Designed by Leonard Milholland
First run 1993
Major applications Milholland Legal Eagle
Unit cost US$1500-3000
Developed from Volkswagen air-cooled engine

Design and development

The engine is a twin cylinder four-stroke, horizontally-opposed air-cooled, direct-drive gasoline engine design based on the Volkswagen air-cooled engine. It employs coil ignition and produces about 30 hp (22 kW). Unlike other half VWs this design does not require cutting the engine block in half, but instead blanks the two aft cylinders and removes the pistons.[1][2]

The design has evolved over time, incorporating improvements to reduce complexity and improve reliability.[2]

Applications

Specifications (Better Half VW)

Data from World Directory of Leisure Aviation 2011-12[1]

General characteristics

  • Type: Twin cylinder, four-stroke aircraft engine
  • Bore: 92 mm (3.6 in)
  • Stroke: 85 mm (3.3 in)
  • Displacement: 920 cc (56.1 cu in)
  • Dry weight: 40 kg (88.2 lb)

Components

  • Fuel type: gasoline
  • Cooling system: air

Performance

See also

Related lists

References
  1. Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, pages 238-239. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  2. Milholland, Leonard (2002). "The Better Half VW Engine". betterhalfvw.com. Retrieved 10 July 2015.
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