added to the turret by reducing the ammunition capacity by 18 rounds. All future Panzer 38(t) tanks were rebuilt according to this specification and those already in service were modified accordingly. The commander had to aim and fire the main gun in addition to his role as commander. The engine was mounted in the rear of the hull and powered the tank through a transmission at the front of the hull with five forward gears and one reverse gear. The track ran under four rubber-tyred road wheels and back over a rear idler and two track return rollers. The wheels were mounted on a leaf-spring double-bogie mounted on two axles. Development In 1935, the Czechoslovak tank manufacturer ČKD was looking for a replacement for the LT-35 tank they were jointly producing with Škoda Works. The LT-35 was complex and had shortcomings, and ČKD felt there would be orders both from the expanding Czechoslovak army and for export. ČKD decided to use a leaf-spring suspension with four large wheels for their new tank with an export success under the name "TNH". With small variations for each customer, 50 were exported to Iran (TNHP), 24 each to Peru (LTP) and Switzerland (LTH). Lithuania also ordered some (LTL). The British Royal Armoured Corps (RAC) had one trial model delivered on 23 March 1939 to Gunnery School at Lulworth. A report stated that "the (bow) gunner could not sit back comfortably as the wireless set was in the way of his left shoulder". The report also stated that, due to the shudder while the vehicle was on the move, it was impossible to lay the gun. Even at the speed of , accuracy was poor. As a result, the British did not purchase the LT-35 and the trial model was returned. In the fall of 1937, the Czechoslovak Armed Forces launched a contest for a new medium tank; Škoda, ČKD and Tatra competed. Škoda Praga submitted the existing joint production export model mentioned above. ČKD also entered a prototype separate from the above, the interesting V-8-H (later called the ST vz. 39), which proved to have numerous mechanical problems. Tatra, known mostly for its smaller, wheeled armoured cars, submitted a paper entry that was a very novel concept that completely changed the layout of a tank, which concept they patented in 1938. On 1 July 1938, Czechoslovakia ordered 150 of the TNHPS model, although