Development
The Czech Army formulated a requirement in the II-a category of light cavalry tanks by the end of 1934. Českomoravská Kolben-Daněk proposed an improved version of its P-II light tank already in service as the LT vz. 34, but Škoda offered a new design that used the pneumatic system and engine earlier proved by its unsuccessful SU or S-II light tank prototype. One prototype was ordered from each company for delivery during the summer of 1935. Both tanks had the same armament and three-man crew, but ČKD's P-II-a was much smaller at 8.5 tonnes (8.4 long tons; 9.4 short tons) and had only a maximum 16 millimetres (0.63 in) of armor while Škoda's S-II-a weighed 10.5 tonnes (10.3 long tons; 11.6 short tons) and had 25 millimetres (0.98 in) of armor. The army thought that P-II-a was at the limit of its development while the S-II-a could be improved as needed.
The first production order for 160 LT vz. 35s, as the S-II-a was designated in Army service, was placed on 30 October 1935 and deliveries began in December 1936. An additional order for 35 was made on 12 May 1936 and a follow-on order placed for 103 more a month later. The total order for 298 tanks was split equally by Škoda Works and ČKD according to their cartel agreement.
Development was rushed and there were many defects in the LT vz. 35s. Many tanks had to be returned to the factories to be repaired. Curiously most of these repairs involved the electrical system, not the complicated pneumatic system.
Read more about this topic: Panzer 35(t)
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