Winged tanks were the subject of several unsuccessful experiments in the 20th century. It was intended that these could be towed behind, or carried under, an airplane, to glide into a battlefield, in support ofinfantry forces.
In war,airborne forces use parachutes to drop soldiers behind enemy lines to capture and hold important objectives until more heavily equipped friendly troops can arrive. Military planners have always sought ways to provide airborne troops with combat support equipment in the form of light armored vehicles orartillery which can be dropped by parachute ormilitary glider.
The problem with air-dropping vehicles is that their crews drop separately, and may be delayed or prevented from bringing them into action.Military gliders allow crews to arrive at the drop zone along with their vehicles. They also minimize exposure of the valuable towing aircraft, which need not appear over the battlefield. An improvement would be atank which could glide into the battlefield, drop its wings, and be ready to fight within minutes. This would allow the crew to immediately begin operation.
In the early 1930s, American engineerJ. Walter Christie experimented with the concept of a self-powered flying tank. Christie's design had a detachable set of wings attached to the roof of a lightly armoured tank and a propeller driven by the tank's engine. A prototype without wings was constructed, but the concept was never developed further.[1][2]
In 1930, the Grokhovskiy Special Design Bureau experimented with dropping "air buses" full of troops: the bicycle-wheeled G-45 onto land, and theamphibious "hydro bus" into water. When the hydro bus disintegrated on landing, the chief designer and his assistant were strapped into the G-45 for a test drop; they survived, but the project was cancelled.[3]
Later, the Soviets used heavy bombers to land on the battlefield carryingT-27 tankettes andT-37 tank light tanks, and experimented with air-dropping light tanks (both with and without parachutes). In 1941, airborne units were issuedT-40 amphibious tanks.[4]
None of these were completely satisfactory, so in 1942 theSoviet Air Force orderedOleg Antonov to design a glider for landing tanks. Antonov was more ambitious, and instead added a detachable cradle to a lightenedT-60 light tank, bearing large wood and fabricbiplane wings andtwin tail. Although one semi-successful test flight was completed, due to the lack of sufficiently powerful aircraft to tow it at the required 160 km/h, the project was abandoned.
The Imperial Japanese Army's experimentalSpecial No. 3 Flying TankSo-Ra orKu-Ro, was developed in 1943. Like the Soviet models, it had detachable wings, but it could also be transported by heavy gliders, namely theKokusai Ku-7 "Buzzard" andKokusai Ku-8 I "Gander". These could be towed by aircraft such as theMitsubishi Ki-21 "Sally" heavy bomber. However, the Japanese Flying Tank project was abandoned before it went into production. The tank transport gliders were deployed to the Philippines during 1944. Another prototype wasMaeda Ku-6 Flying Tank, but it also did not advance to experimental phases.[5]
In 1941,L.E. Baynes produced a design for a 100 ft (30 m) wingspan "Carrier Wing Glider", a large tailless wing to carry a tank. A reduced scale experimental glider – theBaynes Bat – was tested.[6] It was satisfactory but the project was dropped and work on gliders that could carry vehicles internally was taken up. This led to theAirspeed Horsa andGeneral Aircraft Hamilcar that could carry a Jeep and a light tank respectively.
The Soviet Union continued to develop methods to efficiently deployairborne vehicles, but focusing on parachute deployment from large fixed-wing aircraft instead, in an effort to render their "winged infantry" fully mechanized as well. By the mid-1970s, they were able to dropBMD-1s with crew members aboard, using a combination of a parachute andretrorocket.[citation needed]