Though equipped with generally unsuitable designs such as the Henschel Hs 123 and cannon-armed versions of the Heinkel He 112, their armament and pilots proved that the aircraft was a very effective weapon even without bombs.
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The controls proved to be almost inoperable as speed increased, and in testing, one plane flew into the ground from a short dive because the joystick forces were too high for the pilot to pull out.
The KV-1's side, top, and turret armor could also be penetrated by the high-velocity MK 101 carried by German ground attack aircraft such as the Henschel Hs 129, requiring the installation of additional field-expedient appliqué armour.
The Henschel Hs 129, a World War II ground attack aircraft fielded by the Luftwaffe
LZ 129 Hindenburg | U.S. Route 129 | Henschel Hs 293 | American Eagle A-129 | Soviet submarine K-129 | Ohio State Route 129 | Henschel Hs 129 | Henschel | Alberto Henschel | STS-129 | Soviet submarine K-129 (Golf II) | New Jersey Route 129 | Mysore (129) | Henschel-Wegmann Train | Henschel Hs 123 | German submarine U-129 | Convoy SC 129 | ''Aktion Saybusch'', 24 September 1940. Expelled Poles await transport at a railway crossing (in this photo, some members of the 129 families deported from the village of Sól, Silesian Voivodeship |