The decision to master the production of motorcycles for the Red Army in the USSR was made by the Supreme Council of the National Economy on October 5, 1931. At the end of 1931, a group of NATI designers began to create the first Soviet heavy motorcycle. The work was headed by Petr Vladimirovich Mozharov, the creator of one of the first domestic motorcycles of the IZH brand.
The new motorcycle, which received the designation NATI-A-750, was in many ways innovative in its external data: a V-shaped lower-valve 750 cc power unit modeled on the American type Harley-Davidson was installed in the chassis, made after the model of BMW, and the duplex a frame made of stamped profiles with a gas tank embedded inside was combined with a front leaf spring.
The power unit with a working volume of 746 cm3 developed a power of 15 hp. The lubrication system is closed. Oil was supplied directly from the engine crankcase by a gear oil pump. The gas distribution mechanism was driven according to the American model - a set of gears, two of which carried the cams of the valve drive. The gearbox was located on top of the engine oil reservoir. The gears were engaged with a hand lever on the left side of the motorcycle. The power transmission was carried out by a chain drive to the rear wheel.
The first prototype was assembled at OMZ by February 1933, but was not put on the move. By May 1, three more motorcycles were assembled, now on the move, after which the motorcycles passed a test run Izhevsk - Sarapul - Gorky - Moscow and army field tests, as a result of which it was decided to start serial production, but the engineers did not have time to prepare the necessary documentation … Therefore, the production workers, without wasting time, hastened to load OMZ's capacities with the mass production of another motorcycle model. Then NKTyazhProm decided to transfer all the documentation of NATI-A-750 to PMZ, in the shops of which, already in March 1934, they began to make the first ten heavy motorcycles, which were given a new name PMZ-A-750. In July, nine of them were shown to the People's Commissar S. Ordzhonikidze. Learning that next year the workers of the Podolsk plant are going to make 500 of these machines, he objected: "There must be at least one and a half thousand such motorcycles!"
The motorcycle was supposed to be used not only in the army, but also in the civil service. Often the motorcycle was used to transport mail, it was filmed in films, for example, it is the PMZ-A-750 under the direction of Marina Ladynina that can be seen in the 1939 film Tractor Drivers. It was the only domestic pre-war motorcycle equipped not only with an instrument panel, but also with an ignition switch. And although the car turned out to be very durable, it turned out to be very unreliable, capricious. Among the people, due to constant problems with ignition timing at start, the name of the motorcycle received a humorous decoding PMZ - Try Start Me. Numerous complaints and complaints led to the fact that in 1939 the PMZ-A-750 was withdrawn from production and from the armament of the Red Army, although some evidence suggests that in isolated cases this motorcycle was used by Soviet troops at the initial stages of the Great Patriotic War. All pre-war motorcycle manufacturing facilities were devoted to the production of a licensed BMW P-71 motorcycle, produced in the USSR under the designation M-72.
For the period from 1933 to 1939. Soviet industry produced 4 NATI-A-750 motorcycles and 4636 PMZ-A-750 motorcycles.
TTX motorcycle PMZ-A-750
Type: four-stroke, V-shaped
Number of cylinders: 2
Cylinder diameter: 70mm
Piston stroke: 97 mm
Displacement: 746 cm3
Power: 15 HP at 3600 rpm
Compression ratio: 5.0: 1
Valve arrangement: bottom
: 1, type MK-1
Lubrication system: circulating
Clutch: multi-plate, dry
Rear wheel transmission: chain
Number of gears: 3, manual shift
Gear ratios: 3, 03/1, 75/1, 00
Electrical equipment Magdino: type GMN-97
Ignition: battery
Frame: duplex, stamped
Front suspension: leaf spring, 8 sheets with a regulating damper
Rear suspension: rigid
Tire sizes: 4 × 19 inches
Front brake: drum
Rear brake: drum
Length - width - height: 2085 × 890 × 950 mm
Wheelbase - 1395 mm
Clearance - 115mm
Weight - 206 kg
Fuel tank capacity - 18 l
Fuel consumption - 6 l / 100 km
Maximum speed - 95 km / h
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