Operation Sigma Sigma

Sigma
Role Open class sailplane
National origin United Kingdom
Manufacturer Operation Sigma Ltd
Designer John Sellars
First flight 12 September 1971[1]
Status still flying
Number built 2[1]

The Sigma is an experimental glider developed in Britain from 1966 by a team led by Nicholas Goodhart. After disappointing performance during flight testing the Sigma was passed on to a Canadian group which carried out modifications, making the Sigma more competitive.[1]

  1. ^ a b c Simons, Martin (2005). Sailplanes 1965-2000 (2nd revised ed.). Königswinter: EQIP Werbung & Verlag GmbH. ISBN 3 9808838 1 7.