Long Harlequin 933

The Long Harlequin is a two-cylinder horizontally opposed aircraft engine.

Long Harlequin 933
Type Horizontally Opposed Piston
National origin United States
Designer Leslie Long

Design and development

The Harlequin engine was developed as a replacement to the Heath-Henderson B-4 engine used on the Long Henderson Longster homebuilt aircraft. The cylinders were based on a 74 cubic inch Harley Davidson Engine with connecting rods from Continental built Star Marine engine. The builder was expected to forge their own crankcase and crankshaft.[1][2][3]

Applications

Engines on display
  • Eagles Mere Aircraft Museum [4]

Dart Airport Museum in Mayville NY

Specifications (Long Herlequin)

General characteristics

Components
  • Fuel system: Single carburetor
  • Cooling system: Air-cooled

Performance
  • Power output: 30hp @2650rpm

References
  1. "The Plane That Helped Save Homebuilding". Air Progress. Winter 1969.
  2. "Some remarkable experiments in lightplane performance". Popular Aviation. November 1935.
  3. 1933 Flying Manual (Mechanix Illustrated). {{cite journal}}: Missing or empty |title= (help)
  4. "Eagles Mere aircraft museum". Retrieved 7 October 2013.
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