Grigorovich DI-3
| DI-3 | |
|---|---|
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| Role | Fighter |
| National origin | Soviet Union |
| Manufacturer | Grigorovich |
| First flight | August 1931 |
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Grigorovich DI-3 (Russian: Григорович ДИ-3), (Dvukhmyestnyi Istrebitel - two-seat fighter), was a prototype two-seat fighter developed in the Soviet Union in the 1930s. It was intended to be a long-range escort fighter developed from the DI-2 with improved range and performance comparable to single-seat fighter aircraft of the time. DI-3 was a single-bay biplane of mixed construction with a twin-rudder tailplane of variable incidence. Although initial tests demonstrated flight characteristics comparable to Polikarpov I-5, the addition of armament and operational equipment caused significant degradation in performance and DI-3 did not enter mass production. The prototype was subsequently fitted with an enclosed cockpit and used as a VIP transport.[1]
Specifications (DI-3)
Data from Shavrov 1985[1]
General characteristics
- Crew: Two
- Length: 7.8 m (25 ft 7 in)
- Wingspan: 11.8 m (38 ft 9 in)
- Height: ()
- Wing area: 30.1 m² (324 ft²)
- Empty weight: 1,487 kg (3,278 lb)
- Loaded weight: 2,122 kg (4,678 lb)
- Powerplant: 1 × BMW VIz7,3 V12 engine, 545 kW (730 hp)
Performance
- Maximum speed: 256 km/h (138 knots, 159 mph)
- Service ceiling: 6,300 m (20,669 ft)
- Wing loading: 70 kg/m² (14 lb/ft²)
- Power/mass: 257 W/kg (0.16 hp/lb)
- Time to altitude: 17.5 min to 5,000 m (16,400 ft)
- Horizontal turn time: 13 sec
Armament
- 2× 7.62 mm (0.3 in) synchronized PV-1 machine guns
- 1× 7.62 mm (0.3 in) DA machine guns on a manually operated gun mounting.
References
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