A-A-52166B
3.2.7 Cargo area (type IV). The cargo area shall be rail-enclosed on the sides to a height of not less than 8 inches and shall be not less than 5 square feet (ft2) in total platform area.
3.2.8 Ski tiedown straps. When specified (see 7.2), ski tiedown straps with velcro, or equal, fasteners shall be furnished.
3.2.9 Chassis construction. The chassis shall be sufficiently strong to withstand expected shock loads and rough treatment without premature failure.
3.2.10 Windscreen. The vehicle shall be equipped with a transparent windscreen, made of either shatterproof plastic or safety glass. When specified (see 7.2), a cross-country windshield with
full recurve design shall be furnished.
3.2.11 Engine. The engine shall be a multi-cylinder air or liquid cooled, two-stroke cycle, gasoline type having a minimum displacement not less than that specified in table II.
Horsepower and torque ratings shall be obtained in accordance with SAE J1349. Engine shall be equipped with an adjustable ratio oil injection pump.
TABLE II. Engine requirements.
|
Type |
Displacement cubic centimeters (cc) |
Peak horsepower minimum at rpm |
Net torque (lbf-ft) minimum at rpm |
I II III IV |
365 365 365 495 |
34 at 7000 40 at 7500 34 at 7000 32 at 5250 |
25 at 6500 30 at 7000 25 at 6500 33 at 5000 |
3.2.11.1 Engine instruments and controls. Speedometer, odometer, hour meter and deadman throttle control shall be in accordance with SAE J92.
3.2.11.2 Starting system. Starting system shall be manual. In addition, an electric starting system shall be furnished for type IV and when specified (see 7.2) for types I, II, and III.
3.2.12 Transmission. An automatic transmission shall be furnished with the vehicle. For type IV, the transmission shall have not less than two forward speed ranges and one reverse speed. Clutch lining shall be asbestos free.
3.2.13 Tracks. Types I, II and III vehicles shall have at least a single track and type IV vehicle shall have twin tracks. The vehicle track(s) shall be not less than 15 inches wide. The maximum ski and track contact pressure shall be in accordance with SAE J33 and as specified in table I
with the vehicle loaded to the curb weight specified in table I.
3.2.14 Steering. Steering shall be achieved by means of a tie rod linkage connecting the handlebar to the pivoting front ski(s) on type IV and to dual pivoting front skis on types I, II, and
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