FVM S 21
Flygkompaniets Tygverkstäder Malmslätt · Sweden · first flew 1922 · reconnaissance aircraft
The FVM S 21 was a Swedish fabric-covered single-engine biplane built by the Flygkompaniet workshops at Malmslätt.
Recognition (WEFT)
| W — Wings | Low-mounted, straight |
|---|---|
| E — Engines | 1 × piston, nose-mounted |
| F — Fuselage | Rear fuselage rising to a V-shaped cross-section |
| T — Tail | Conventional |
WEFT is AircraftIQ's four-point recognition method — how it works.
Spot it by:
- Fabric-covered single-engine biplane
- Rear fuselage rising to a V-shaped cross-section
- Small fin and enlarged rudder added after the first test flights
A wood-and-fabric biplane with a high-set rear fuselage of V-shaped section; many carried floats.
Specifications
- The FVM S 21 has a length of 8.75 m (29 ft).
- It has a wingspan of 12.3 m (40 ft).
- Its maximum speed is 168 km/h (104 mph).
- Typical crew: 2.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
Design began in 1921 to take an airship engine bought as war surplus. The first aircraft was ready for testing in October 1922, and its poor directional stability led to a redesigned rear end with a small fin and larger rudder.
Variants
Versions were the S 21HL landplane, the S 21H floatplane and the S 25 with a Mercedes engine.
Where you'll see it
A total of 30 S 21 and S 25 were built. One carried Red Cross markings for ambulance flights, and six passed to the new Air Force as the S 1.
Related aircraft
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