Images of a report detailing various (German?) tests on the T-62 tank

ET-06 (Erpobungsträger 06),  refers to the T-62.

First image
"4.11 Cross slope travel

A 30% cross-slope with a pavement made of molded stone pavement was driven by the ET 06 without difficulty, even when the road surface was damp.

The grip of the chain is sufficient, starting the engine was unproblematic.

It was not possible to swivel the tower by hand against the slope, but it was ensured with the electric lateral directional gear. The time for a 360 ° turn of the tower (turret) was approx. 22s on the sloping slope and approx. 20s on the level.

The Leopard 1 fulfills all requirements for driving on an incline without any restrictions."

Image 2
"4.12 60% gradient

The ET 06 was able to negotiate a 60% incline (tower position 12 noon, concrete roadway with transverse steel rails to increase grip) in 1st gear and with the steering lever in 1st notch.

The vehicle can be held on this slope with both the parking brake and the steering brake.

The start-up causes considerable difficulties because of the type of transmission.

The engine can be restarted safely after 5 minutes of standstill.

For the Leopard, the fulfillment of the specified properties is one of the acceptance conditions. In contrast to the ET 06, starting up is easy and risk-free."

Image 3
"4.13 Relative degree of damping

The relative attenuation D of the pitching vibration of the vehicle body around its transverse axis was determined from the swinging process of the pitching vibration, which was stimulated by the fact that the vehicle was raised by 30 cm or 40 cm at the rear with the aid of a crane and the rope was then released .

The decay process was filmed with a high-speed camera. The evaluation of the film on a suitable analyzer showed the pitch angle of the vehicle as a function of time.

For a weakly damped, vibratory system, the following applies to the following amplitudes during the decay process form a geometric series. This is exactly true for a linear system. The type and characteristics of the suspension and damping system of the ET 06 allow this principle to be applied."

Image 4
"For the Leopard 1, for the pitching oscillation resonance phase when traveling on the sin trajectory (wavelength 7.6 m, amplitude 50 mm), a damping factor of

DL1 = 0.35

(has been) determined.

In relation to a linear spring-mass system, a D = 0.35 means an increase in the pitch angle in the resonance phase of 1.8, and a D = 0.263 means an increase of 2.23. The relative evaluation shows that the Leopard 1 is the much better coordinated oscillation system and thus allows a higher average cross-country speed.

Tab. 14: Relative degree of attenuation, relative evaluation"