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The key feature of the Ward Leonard control system is the ability to smoothly vary the speed of a DC motor, including reversing it, by controlling the field and hence the output voltage of a DC generator, as well as the field of the motor itself. As the speed of a DC motor is dictated by the supplied voltage, this gives simple speed control.
This may be combined with brakes to further control the steering radius. [1] The obvious disadvantage to this design is the cost and complexity of two drive trains, and the increased maintenance load that implies. Another is that if one engine fails, the other cannot be used to drive both tracks.
A later design of cross-drive transmission, the Allison X1100, was used in the 1970s experimental US MBT-70 and XM1 [3] tanks, then later adopted in the M1 Abrams.This adopts a different principle for the steering cross-coupling: instead of a hydro-dynamic torque converter, it uses a hydrostatic combination of a hydraulic pump and a hydraulic motor.
M48A2C tank, combat, improved fire control, full-track, 90 mm; M48A2E1 tank, combat, multi-fuel engine, full-track, 90 mm (1959) M48A3 tank, combat, production version of M48A1E2, 90 mm (1960) M48A4 tank, combat, f-t, M60 turret, 105 mm, (M48E3 chassis) (1965) M48C tank, mild steel, 'C' for condemned embossed into right front hull; M48E1 tank ...
M10A1 gun motor carriage, M10 tank destroyer Ford; T16 light tank. G-171 T16 light tank, Marmon-Herrington, model CTLS-4TAC; G-172 M2 crane, truck mounted, and M16 trailer for clamshell. G-173 M12 gunnery trainer tank, 75-mm gun; G-174 motor toboggan, Carl Eliason, model C. snowmobile Four Wheel Drive Co. G-175 Special tool combat vehicle; G-176
Transfer of power to the track is accomplished by a drive wheel, or drive sprocket, driven by the motor and engaging with holes in the track links or with pegs on them to drive the track. In military vehicles, the drive wheel is typically mounted well above the contact area on the ground, allowing it to be fixed in position.
Drivers race on the apron at Chicagoland Speedway (the area between the white and yellow lines). aero cover See wheel shroud. air jacks Pneumatic cylinders strategically mounted to the frame near the wheels of a racing car, which project downwards to lift the car off the ground during a pit stop to allow for quick tire changes or provide mechanics access to the underside of the car for repairs.
At least two losses are believed to have been due to Strela-10s: On February 15 an A-10A (78-0722) of 353rd TFS/354th TFW was hit by a SAM believed to be a Strela-10, some 100 km north west of Kuwait City, while attacking Republican Guard targets. Pilot Lt Robert Sweet ejected and was made a prisoner of war.