Spratt Controlwing 107
George Spratt · United States · first flew 1967 · light aircraft
The Spratt Controlwing 107 was an unorthodox controlwing flying boat designed in the United States in the 1960s and marketed for home building in the 1970s.
Recognition (WEFT)
| W — Wings | High-mounted, straight |
|---|---|
| E — Engines | 1 × piston, fuselage-mounted |
| F — Fuselage | 5.18 m fuselage |
| T — Tail | V-tail |
WEFT is AircraftIQ's four-point recognition method — how it works.
Spot it by:
- Flat, speedboat-like hull with a square bow
- Strut-mounted parasol wings that pivot independently to vary their angle of attack
- Tailfins angled to form a butterfly tail, with a pusher propeller driven by a marine outboard motor behind the seats
A tiny hull with a pair of parasol wings on struts, small angled fins at the tail and an outboard motor with a pusher propeller behind the open cockpit.
Specifications
- The Spratt Controlwing 107 has a length of 5.18 m (17 ft).
- It has a wingspan of 7.32 m (24 ft).
- Its maximum speed is 158 km/h (98 mph).
- Typical crew: 1.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
George Spratt and his friend Elliot Dalland began building the prototype, registered N2236, in 1962, and it first flew in 1967. Spratt claimed the aircraft could not stall or spin and was 75 per cent less affected by turbulence than a conventional design.
Variants
The Model 107 was marketed as plans for home builders, with 60 sets sold by 1977. Its wings and tail fins carried no moving surfaces, and each wing pivoted independently to control the aircraft.
Where you'll see it
It was sold as a set of plans for home builders in the 1970s, with 60 sets sold by 1977. The pilot and one passenger sat side by side in an open cockpit.
Related aircraft
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