DAR 4
Darzhavna Aeroplanna Rabotilnitsa · Bulgaria · first flew 1930 · airliner
The DAR 4 was a prototype airliner built in Bulgaria in 1930 by the state aircraft workshop, Darzhavna Aeroplanna Rabotilnitsa. It was a three-engined biplane with an enclosed cabin for two pilots and four passengers.
Recognition (WEFT)
| W — Wings | High-mounted, straight |
|---|---|
| E — Engines | 3 × piston, wing-mounted |
| F — Fuselage | Top wing mounted above the fuselage on cabane struts, with a narrow-track undercarriage |
| T — Tail | Conventional |
WEFT is AircraftIQ's four-point recognition method — how it works.
Spot it by:
- Bulgarian three-engined biplane airliner prototype, 1930
- Radial engines in the nose and on each lower wing where the struts meet
- Top wing mounted above the fuselage on cabane struts, with a narrow-track undercarriage
A three-engined unequal-span biplane with radial engines in the nose and on the lower wings, an enclosed cabin and a top wing raised above the fuselage on cabane struts.
Specifications
- The DAR 4 has a length of 10 m (33 ft).
- It has a wingspan of 14 m (46 ft).
- Its maximum speed is 195 km/h (121 mph).
- Typical crew: 2.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
The DAR 4 was a conventional biplane with unstaggered wings of unequal span braced with Warren trusses. The top wing was held above the fuselage on cabane struts. Three 145 hp Walter Mars radials were fitted. Performance was disappointing, and the narrow-track undercarriage created difficulties.
Variants
Only the single prototype was built.
Where you'll see it
No further examples followed the prototype, and the type entered no regular service.
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