The project of this very unusual wheeled-tracked infantry fighting vehicle was carried out in the spacecraft of the Altai Tractor Plant and VA BTV in 1964. The vehicle was named Object 19. It had a traditional welded hull made of rolled armor plates. The undercarriage of the vehicle was a 4 × 4 wheeled chassis with an auxiliary tracked mover. This mover was the whole trick. It was located between the axles of the front and rear wheels, and was used to increase cross-country ability, for which it was lowered to the ground. The transition from wheeled to wheeled caterpillar was carried out on the spot or on the move in 15-20 seconds. The tracked propeller used rollers from the PT-76 amphibious tank.
The layout of the Object 19 armored personnel carrier was traditional for that time. the driver was located in the front left, to the right of the driver was the commander's seat, and he and the other got into the car through the hatches in the roof. In the middle of the armored personnel carrier there was a fighting compartment, which consisted of a single turret armed with a 73-mm 2A28 smooth-bore cannon and a 7, 62-mm machine gun paired with it. On top of the tower was attached to the launcher ATGM 9M14M "Baby". As you can see, the turret on the vehicle migrated from the well-known BMP-1 without any changes. The landing troops were stationed around the fighting compartment. The landing was made through hatches on the roof of the hull. The engine compartment was located at the rear of the car and consisted of a 300 hp water-cooled engine. The car, like the BMP-1, could float and move through the water due to two jet-type water cannons.
PS. Why this machine was not put into service, I have no data. Therefore, one can argue whether it was done right or wrong.
On the one hand, we see a clear complication of the design, in comparison with the serial BMP-1 and BTR-60. But on the other hand, this machine could successfully replace both of the above machines. On the ground, she could move, on a mixed, wheeled-caterpillar track, and on the roads, respectively, only on wheels.
