Operation Sigma Sigma
Operation Sigma Ltd · United Kingdom · first flew 1971 · glider
The Sigma is an experimental glider developed in Britain from 1966 by a team led by Nicholas Goodhart, and designed by John Sellars.
Recognition (WEFT)
| W — Wings | High-mounted, straight |
|---|---|
| E — Engines | 1 × none, embedded-mounted |
| F — Fuselage | 8.81 m fuselage |
| T — Tail | Conventional |
WEFT is AircraftIQ's four-point recognition method — how it works.
Spot it by:
- Open-class sailplane with a 21 m span
- High-mounted wing on a single-seat glider
- Flaps along a large part of the span
Look for a very long-span open-class glider with its wing mounted high on a slender fuselage.
Specifications
- The Operation Sigma Sigma has a length of 8.81 m (29 ft).
- It has a wingspan of 21 m (69 ft).
- Typical crew: 1.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
It first flew on 12 September 1971. Its performance in flight testing was disappointing.
Variants
Two were built. The aircraft was passed on to a Canadian group which modified it and made it more competitive.
Where you'll see it
One is still flying. Modification by the Canadian group raised the glide ratio from 41:1 to 47:1.
Related aircraft
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