An interesting little vehicle. Maybe a game version based about Universel Carrier or razeed T-40S plus added a Zis-3 gun. Via alternathirtori.org.ua, and WOT forums...
OSA-76
Self-propelled gun
Developer: Bureau of Plant ?38
Started in: 1943
Year of construction of the first prototype: 1944
Standard was not issued in connection with the termination of the war.
The history of this amazing self-propelled started in mid-1943 during a fierce battle in the Kursk sector and Mius-front. Great loss not only in the instruments, but also in the artillery tractors and heavy-duty vehicles, as well as growing demand front, the Red Army forced specialists GAU create a new concept of regimental and divisional artillery self-propelled carriages. The project was soon forced measure, because a little earlier "gunners" deprived of self-propelled guns, which were subordinated to the tank units. The project was named OCA - combined arms self-propelled artillery, and became a separate branch of the Soviet self-propelled guns.
As part of the terms of reference provided for the creation of several different types of self-propelled guns.
OSA-76 - 76-mm divisional ACS partial booking
OSA-57 - 57-mm antitank SPG partial booking
OCA-W - anti-aircraft self-propelled guns equipped with anti-aircraft machine gun or twin installation of large-caliber anti-aircraft machine guns partial reservation.
Major works were entrusted to the Bureau of Plant ?38 and GAZ. The first company in the development of the division of ACS (ready-to-implement project OSA-57 was soon canceled) Select the direction in which one and a half years earlier went KB Ginzburg.Were based on sets of running gear light tanks T-60 or T-70 engine units GAZ-MM, while similar to the SU-76 layout. At the same time, the ACS is much smaller and more compact, and its design weight was about 3500 kg. Self-propelled chassis, applied to one side, consisted of a 4-track roller of small diameter, the two support rollers, front and rear guide of the drive wheel. In front of the building housed the engine-transmission unit and control room at the rear of the fighting compartment was open behind the wheelhouse. The main armament chose 76.2 mm gun ZIS-3. Mask angles pointing guns allowed on the horizon to 10 ° on both sides and from -5 ° to + 12 ° vertically. The thickness of the frontal armor plate was only 6 mm, but in the melee to use the OSA-76 is not going to. Self-propelled gun crew consisted of 3 people.
Gorky chosen a more original solution, setting a 76.2 mm gun on the modified chassis of armored terrain GAZ-63 and set it to a lower bronekorobku with thick front plate first 10 mm and then 16 mm. According to factory records, this machine has passed as the GAZ-68, but now it is more commonly known under the designation of troop KSP-76.
Comparative tests of both prototypes were held in the spring and fall of 1944 Although PCB-76 had advantages in ease of maintenance, the OSA-76 was 1.5 tonnes lighter, which explains its better performance characteristics. In addition, self-propelled crawler has other valuable qualities. OSA-76 proved to be more stable when firing, and could overcome many kilometers marches as on country roads and on the highway, which in combination with the use of gasoline 2nd grade or German synthetic fuel made her simply irreplaceable. The general opinion about the operational and combat qualities of the OSA-76 was positive, that drew the attention of not only the artillery, but also tanks and paratroopers.
At the end of 1944, ACS has been recommended for serial production, provided the removal of all identified deficiencies. While there was a process of improvements war entered its final stage, when the advantage of the Red Army in all kinds of weapons became undeniable. This fact forced to abandon further development of the project and the spring of 1945, all work on the OSA-76 were shut down.
SPECS
BATTLE GROUND 3500 kg
Crew. 3
DIMENSIONS
Length, mm 5000 (with a gun)
Width 2150
Height, mm 1560
Clearance 290
WEAPONS one 76.2-mm gun ZIS-3
Ammunition 30 shots
Aiming devices ?
BOOKING forehead housing - 6 mm
board housing - 6 mm
feed housing - 6 mm
cutting his forehead - 10 mm
cutting board - 6 mm
cutting feed - 6 mm
roof -?
bottom -?
ENGINE GAZ-MM, in-line, 4-cylinder, carburetor, liquid-cooled, 50 hp
TRANSMISSION mechanical type: mechanical type, multi-head and friction clutches dry friction, 5-speed gearbox
CHASSIS (On one side) 4 road wheels, 2 support rollers, rear wheel drive, with steel caterpillar Melkozvenchataya Tracians
SPEED 41 km \ h
Cruising on the highway 220 km[/img]
Author
Topic: Desant vehicles! (Read 2927 times)
