Antonov A-40

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A-40 Krylya Tanka
Designer's model of the Antonov A-40
General information
Type	Glider
Manufacturer	Antonov
Designer	Oleg Antonov
Status	Cancelled
Primary user	Soviet Air Force
Number built	1
History
First flight	1942
Developed from	T-60 tank

The Antonov A-40 Krylya Tanka (Russian: крылья танка, meaning "tank wings") was a Soviet attempt to allow a tank to glide onto a battlefield after being towed aloft by an airplane, to support airborne forces or partisans.^[1] A prototype was built and tested in 1942, but was found to be unworkable. This vehicle is sometimes called the A-40T or KT.

Instead of loading light tanks onto gliders, as other nations had done, Soviet airborne forces had strapped T-27 tankettes underneath heavy bombers and landed them on airfields. In the 1930s, there were experimental efforts to parachute tanks or simply drop them into water. During the 1940 occupation of Bessarabia, light tanks may have been dropped from a few meters up by TB-3 bombers, which, as long as the gearbox was in neutral, would allow them to roll to a stop.

The biggest problem with air-dropping vehicles is if their crews are dropped separately, they may be delayed or prevented from bringing them into action. Gliders allow crews to arrive at the drop/landing zone along with their vehicles. They also minimize exposure of the valuable towing aircraft, which need not appear over the battlefield. So the Soviet Air Force ordered Oleg Antonov to design a glider for landing tanks.

Antonov was more ambitious. Instead of building a glider, he added a detachable cradle to a T-60 light tank bearing large wood and fabric biplane wings and a twin tail. Such a tank could glide into the battlefield, drop its wings, and be ready to fight within minutes.

One T-60 was converted into a glider in 1942, intended to be towed by a Petlyakov Pe-8 or a Tupolev TB-3. The tank was lightened for air use by removing its armament, ammunition and headlights, and leaving a very limited amount of fuel. Even with these modifications, the TB-3 bomber had to ditch the glider during its only flight, on September 2, 1942, to avoid crashing, due to the T-60's extreme drag (although the tank reportedly glided smoothly). The A-40 was piloted by the famous Soviet experimental glider pilot Sergei Anokhin. The T-60 landed in a field near the airport, and after dropping the glider wings and tail, the driver returned it to its base. Due to the lack of a sufficiently powerful aircraft to tow it at the required 160 km/h (99 mph), the project was abandoned.^[1]

Data from The Osprey Encyclopedia of Russian Aircraft 1875–1995^[2]

General characteristics

• Crew: Two
• Capacity: 1 × T-60 tank
• Length: 12.06 m (39 ft 6.75 in)
• Wingspan: 18.00 m (59 ft 0.75 in)
• Wing area: 85.8 m² (923.5 sq ft)
• Empty weight: 2,004 kg (4,418 lb)
• Gross weight: 7,804 kg (17,205 lb)

• Winged tank
• Baynes Bat, a British design of World War II to add glider wings to a tank
• General Aircraft Hamilcar, a military glider of the period capable of carrying light tanks.
• Messerschmitt Me 321 and Junkers Ju 322, German gliders designed to be capable of carrying light armored vehicles.
• The T-80, the T-84 and the Mil Mi-24 have also been nicknamed Flying Tank, the first two for their great speed for a land vehicle, the latter for its great resilience for an airborne vehicle.

The attack plane Ilyushin Il-2 has also been nicknamed "the flying tank".

• Gunston, Bill (1995). The Osprey Encyclopedia of Russian Aircraft 1875–1995. London: Osprey. pp. 19–20. ISBN 1-85532-405-9.
• Kotelnikov, Viktor (2015). "Russia's Real Flying Tanks". The Aviation Historian (13): 124–129. ISSN 2051-1930.
• Shavrov, V. (1997). "Istoriya konstruktsiy samoletov v SSSR". Bronekollektsiya (4).
• Winchester, Jim (2005). The World's Worst Aircraft: From Pioneering Failures to Multimillion Dollar Disasters. Barnes & Noble Books. p. 62. ISBN 978-0-7607-6742-9.
• Zaloga, Steven J.; James Grandsen (1984). Soviet Tanks and Combat Vehicles of World War Two. London: Arms and Armour Press. pp. 192–3. ISBN 0-85368-606-8.

Wikimedia Commons has media related to Antonov A-40.

• T-60 modifications Archived 2016-01-11 at the Wayback Machine at battlefield.ru
• Antonov KT flying tank at unrealaircraft.com
• KT-40 flying tank at the Russian Aviation Page
• Krylja Tanka, illustrated page in Lithuanian
• Flying Tanks that Shed Their Wings by Lew Holt in Modern Mechanics and Inventions, July 1932.