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Our 1/2 VW products have been transferred to Great Plains Aircraft 

The original 1/2 VW developed in 1974
It has proven to be a strong and reliable aircraft engine.
The 1/2 VW engine is powering experimental aircraft throughout the world

[prototype Carr Twin]
Test flying the prototype Carr Twin
and the RV-5 aircraft.
Antique experimental 1/2VW 
powered Longster.

Carr Twin

Cut Case Version
Cut Case Version
Full Case Version
Full Case Version

Engine Specifications

  • 2-Cylinder opposed twin
  • 4-Cycle O.H.V.
  • Bore: 92 mm
  • Stroke: 78 mm
  • Displacement: 1037cc
  • Weight: 87 lbs.
  • 35+ hp @ 3400 rpm

    To order the complete plans and construction manual to build this engine and/or the information pack please contact:

    Great Plains Aircraft:   1-800-922-6507
    For inquiries:   1-402-493-6507

    Link to :

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    Copyright 2002 Carr Precision