Viking SF-2A Cygnet
Viking Aircraft · United States · first flew 1973 · light aircraft
The Viking SF-2A Cygnet, also called the Sisler SF-2A Cygnet and the HAPI SF-2A Cygnet, is an American STOL amateur-built aircraft designed by Bert Sisler.
Recognition (WEFT)
| W — Wings | High-mounted, swept |
|---|---|
| E — Engines | 1 × piston, nose-mounted |
| F — Fuselage | 5.79 m fuselage |
| T — Tail | Conventional |
WEFT is AircraftIQ's four-point recognition method — how it works.
Spot it by:
- Strut-braced shoulder wing supported by a single strut with a jury strut
- Two seats side by side in an enclosed cockpit under a bubble canopy
- Fixed conventional landing gear
A small strut-braced shoulder-wing STOL aircraft with a bubble canopy and a single tractor engine.
Specifications
- The Viking SF-2A Cygnet has a length of 5.79 m (19 ft).
- It has a wingspan of 9.14 m (30 ft).
- Its maximum speed is 174 km/h (108 mph).
- Typical crew: 1-2.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
The Cygnet first flew in 1973 as a development of the earlier Sisler SF-2 Whistler. Plans were first marketed by Sisler Aircraft of Bloomington, Minnesota, then by HAPI Engines, and by the 1990s by Viking Aircraft of Elkhorn, Wisconsin.
Variants
It is a development of the SF-2 Whistler and is supplied as plans for amateur construction.
Where you'll see it
The aircraft is made from wood and 4130 steel tubing, covered in doped fabric. The recommended engine range is 60 to 82 hp and the standard engine is an 82 hp Volkswagen four-stroke.
Related aircraft
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