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Advantages: diesel engine provided a reasonable automy
Disadvantages: weak armor, low speed, limited traverse and utility gun, suspensions and filters were incompatibles with desert conditions and need better tropicalization.
In action...
In 1933 it was clear the the tankettes were not the answer for replacing the overaging FIAT 3000s and a new tank was commisioned. After experimenting about a bigger and heavier 12 tons tank based on the CV.33 design, a lighter 8 tons tank version was chosen. In 1935 new tank appeared with its 37mm L40 gun with a limited traverse of 15º on the left and on the right and 12º on top and bottom thanks to an hydraulic device on the horizontal plane. The gunner seated on the right and the driver, lightly reared, on the left while the commander manouvered the turret two Breda 8mm MGs. The engine, still of commercial version, transmitted its move through a gear box to the forward sprocket. The drive was possible because of an epicyclic lever and the brakes.
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The prototype of the M. 11/39 |
Ground tests demonstrated that the vehicle needed improvements on the engine and transmission systems; a new rounded turret was designed to speed and make easier the production and so, in 1937, the new tank, designed "Carro di rottura" (breaktrough tank) was requested in a first (and only) batch of 100 exemplaries.
Lack of materials delayed the production until 1939 when it begun to be delivered with the signature M. 11/39 (which states for "Medium tank weighting 11 tons and accepted in service in 1939"): this vehicle was taller, heavier (about 10 tons) and hard to explain the tank was lacking the radio (that instead was mounted on the prototype).
In May 1940 24 M. 11/39s were sent in A.O.I. ("Africa Orientale Italiana", Italian Eastern Africa) grouped in a "Compagnia speciale carri M.", special M. tanks company to reinforce the Italian positions in the colony. On the start of the conflict field commands required new tank reinforcements because the light CV. 33s were unuseful, as demonstrated in first encounters with British armored units. 70 tanks were placed at disposal of the 4th Tank Regiment and landed in Bengazi in July of the same year.
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A M. 39 abandoned on the side of the Balbian way, 1941 |
When first employed against the English the M.11/39 got enough succes while being used in infantry support role during the first advance to Sidi Barrani. Similarly to the L. 33s this tanks were mechanically unreliable: in September when the Armored Groups were re-created the I Battailon of the 4th Tank Regiment's 31 tanks only nine were still in service. The first engagements with the british tanks immediatly proved the inferiority and weakness of the M.11 in both gun and armor thickness and shape, without speaking about the weak trasmission/suspension system.
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A shot of the rear of a M. 39 captured by the British in North Africa. |
The disaster was near: when the British launched their offensive in December 1940 the II Bataillon (2 M.11 companies) detached to Maletti Group was surprised near Nibeiwa and 22 of its tanks were knocked out. The I Battailon, while being part of the new Special Armored Brigade with a M.13 Battaillon and 2 L.33 battailons, was able to take only a minor part in the fight because the most part of its tanks were in Tobruk for repairs.
The following defeat in early 1941 took the destruction or the capture of almost all the M.11/39s: because of their unreliability and lack of any recovery vehicle the immobilized vehicles were abandoned in the enemy hands: the Australians equipped an entire regiment with the captured M.39 but they were soon put out of service because of their faults. The remnants six(!) tanks were used in Italy for training purposes and were officially put out of service after the armistice of September 1943.
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Another knocked out M.39 while
being inspected by a British soldier. This photo let to
understand the
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