Long Harlequin 933

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

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

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 JD Engine with connecting rods from Continental built Star auto engine. The builder was expected to machine their own crankshaft, Les Long cast and sold crankcases^[1][2][3]

Applications

• Long Longster

Engines on display

• Eagles Mere Aircraft Museum ^[4]

Dart Airport Museum in Mayville NY

Oregon Aviation Historical Society Cottage Grove Oregon

Glen Curtis Museum Hammondsport, New York

Two other examples known in private collections

Specifications (Long Herlequin)

General characteristics

• Dry weight: 90lb

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.