Posted by Charlie on Friday, January 19, 2001 at 2:33PM :
In Reply to: Correction - 292,083 ft lb per axle. posted by Sorry on Friday, January 19, 2001 at 11:31AM :
300 X ~100 = 30,000. BUT: even with a locker - how are you going to deliver that torque to an axle? The coefficient of friction of tires on dry pavement is ~1.0. Assuming all the weight on one wheel of an axle, and a locker, figure 3-4000 lb max adhesive force. Though an 18" (1.5') lever arm, that means 4500-6000 ft-lb will make the tire slip. All these tremendous gear reductions do is slow things down. It might be interesting to try to tow a 747 with the brakes off. That's a very heavy object with lowish rolling resistance on a flat surface. Might be possible with a very strong (4") nylon snatch strap. Depends on the rolling resistance. If the plane (600,000 lb) has even 0.01 rolling resistance, that equals 6000 lb which the truck can barely overcome.
Charlie
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