"Trials of A-7 and A-7M tanks.
Objective: determine the convenience and time required to escape from the tank using the lower hatch near the driver's seat.
Time and place: August 22nd, 1939, plant "540"
Methodology: the crew, located inside the tank with all hatches open, receives the "exit!" command, and leaves through the lower hatch, disconnecting the brake line. The crew (3 men) take one DT machinegun, two backpacks with magazines, and the bipod when leaving the tank.
Before leaving the tank, the crew performs preliminary procedures, consisting of:
- Placing the disk magazines in backpacks.
- Readying the DT machinegun.
- Opening the hatch.
- Disconnecting the brake line.
|Packing disk magazines||0.5|
|Unscrewing hatch bolts||11.3|
|Exit through the hatch of three men with DT machinegun and two backpacks with magazines||1.3|
|Closing the hatch from the inside||13.5||The rubber lining of the hatch was removed, as its presence interferes with replacing the hatch.|
- In summer time, it is possible to exit the tank without disconnecting the brake line.
- The time it takes to exit the tank (13.1 minutes) must be reduced to the minimum by adjusting the design of the attachment of the hatch.
- The liner must be redesigned so that it stays in place when the hatch is opened."