Operation Sigma Sigma - Variants

Variants

Data from:British Gliders and Sailpanes 1922-1970

Sigma Type A

This version was under construction at the Slingsby factory at Kirbymoorside in 1969 when they were completely destroyed in the 1969 Slingsby factory fire.

Sigma Type B

A version differing in detail from the Type A, not completed.

Sigma Type C

After the fire the project was taken on by Operation Sigma Ltd., ostensibly to supply a world beating sailplane for the World gliding Championships. Of similar outline, shape and size to the original prototypes, the Type C was completely revised in detail, but retained the construction methods of the earlier aircraft.

(Marsden) Sigma

The Sigma after modification in Canada by David Marsden.