OSA-76

"Lightened 76 mm SPG OSA-76

Factory #38 designed a draft project of a lightened 76 mm SPG (factory designation OSA-76) with a ZIS-3 gun on their own initiative.

The draft project was presented to the GBTU USA for review.

Experimental prototypes of the SPG are being build.

Brief tactical-technical characteristics of the OSA-76:

1. Mass: 3400 kg
2. Armour:
1. Front: 6 mm
2. Sides: 4 mm
3. Engine power (four cylinder engine): 50 hp
4. Range: 250 km
5. Dimensions:
1. Length (with barrel): 4800 mm
2. Width: 2050 mm
3. Height: 1560 mm
6. Bore axis height: 1050 mm
7. Top speed: 35 kph
8. Armour piercing shell muzzle velocity: 662 m/s
9. Armour piercing shell mass: 6.5 kg
10. Vertical range: -5° to +12°
11. Horizontal range: +/- 10°
12. Ammunition carried: 30 shells
13. Crew: driver, gunner, loader
14. Sight: mechanical, with Hertz panorama

The armour has three variants:

1. First:
1. Front: 6 mm
2. Sides: 4 mm
2. Second (combat mass 3700 kg):
1. Front: 10 mm
2. Sides: 10 mm
3. Third (combat mass 3800 kg):
1. Front: 15 mm
2. Sides: 10 mm"

CAMD RF 38-1369-492