| Technical data | |
|---|---|
| Type | OPB-5 |
| Function | Dive Bomber |
| Year | 1941 |
| Crew | 1 |
| Engines | 1*1425hp M-90 |
| Length | 8.28m |
| Wingspan | 10.4m |
| Wing area | 18.0m2 |
| Empty weight | 2806kg |
| Loaded weight | 3842kg |
| Wing Load (kg/m2) | 213 |
| Power load (kg/hp) | 2.7 |
| Speed at 0m | 504km/h (project) |
| Speed at 5700m | 600km/h (project) |
| Climb to 1000m | 1.1min (project) |
| Climb to 5000m | 5.8min (project) |
| Ceiling | 9900m (project) |
| Range | 660km (project) |
| Armament | |
| Guns |
2*7.62mm ShKAS 850rpg 2*12.7mm BS 220rpg |
| Bombs | 1*500kg inside fuselage |
OPB-5, S.A.Kocherigin
|
OPB stays for Odnomotornyj Pikirujuschij Bombardirovschik, single-engine dive bomber. Low-wing monoplane with inverse gull wing. Single 500kg bomb is hidden in fuselage, attached to the parallelogram support. Before release it is moved out of the propeller arc.
Construction - composite. Wing spars - steel/duralumin, front section of fuselage - duralumin, tail section - plywood. Tailplane and fin - duralumin, elevators and rudder - with fabric cover.
Cooling air was supplied to the engine by central air intake (like on early Fw-190 prototypes). Fuel tanks - protected.
Project started in 1938 for the M-90 engine. Aircraft was finished in 1941, but the powerplant was not ready. Team started to re-engine OPB-5 for available M-82A, but in the beginning of 1942 project was cancelled and design bureau was disbanded.
Sources
- "History of aircraft construction in the USSR", Vol.2 p.40-41
