- Yes
- No
Hi, today I would like to suggest an experimental tank with an attempt of improving the mobility forward and reverse.
Specifications
Spoiler
Crew: 3
Weight: 41.5 tonnes
Armor: composite armor similar to object 432
Armament: 2A21 115mm cannon and PKT 7.62mm coax MG
Engine: V-60N V-type engine producing 900hp at 2100rpm
Max road speed: 70kph both forwards and backwards (4F/4R)
Development history
Spoiler
Experimental work of hydro-mechanical transmission was developed in НИИтрансмаш (NIItransmash) from 1967 With the intention of improving the mobility of tanks at the time. Main attention went to the mobility on the battlefield.
In 1971 a couple of models were made with the ГМТ-69021 (GMT-69021) propulsion layout, and also a special experimental vehicle based on a medium tank T-64A with the new chassis and engine compartment - rolling model 69021 (“object 021”)
Since 1972, an experimental tank with a prototype GMT-69021 has been used to test promising solutions incorporated into the design.
(Engine compartment of the object 021)
The engine compartment consisted of a four-stroke V-60N engine producing 900 horsepower at 2100 rpm and GMT-69021 transmission.
The chassis of the prototype, made according to a seven-support scheme with misaligned torsion shafts and rear drive wheels, included four support rollers and bladed hydraulic shock absorbers on the first, second and seventh pairs of road wheels.
(Hull of the object 021:)
(High-capacity track roller with pneumatic tire:)
The track rollers were double-row, with massive rubber tires (630×170 mm), with wheels made of V-93 aluminum alloy. Steel flanges were mounted on the inner surface of the discs to protect them from track fangs. The main difference between the used track roller bearing and the 97520U bearing used on the T-64A was the increased length of the outer clips. This made it possible to install the bearing directly in the body of the aluminum disk of the track roller without using a hub and thereby reduce the total weight of the assembled roller to 129 kg.
The blade-type hydraulic shock absorber, leverless, built into the suspension bracket, differed from existing analogues by installing the blade on the balancer axis. The partition, together with the hydraulic shock absorber housing, was attached directly to the side of the machine, which ensured ease of layout and eliminated the need to use heavily loaded levers, hinges and protective covers. In addition, the presence of a developed cooling surface in direct contact with the machine body made it possible to increase the energy intensity of the hydraulic shock absorber. The sealing of the moving joints between the blade, the partition and the hydraulic shock absorber body was achieved through the use of a rubber cuff vulcanized to the blade.
Various types of tracks were studied on the model: 54.44.sb13Е,
borrowed from the T-54 tank; VR.155.1378-3A (the standard VR. 155.1378-3A tracks with a cast track and a sequential type RMS were developed in the design bureau of the Omsk Transport Engineering Plant named after the October Revolution for the T-62 tank and retained the existing unification of the chassis of the T-54, T- 55 and T-62) and later – new tracks were developed for the Object 219 tank.
Sources
Spoiler
Gur Khan attacks!: Эксперементальные работы по ГМТ-69021 (1967-75гг.) (contains a report related to the GMT-69021)
Любопытный материал про «69021» - Andrei-bt — LiveJournal
КОНСТРУКЦИЯ И ХАРАКТЕРИСТИКИ ХОДОВОГО МАКЕТА С ГМТ 69021
По пути к газотурбинному танку: ходовой макет «69021» - Альтернативная История