Is that going to be on the final? Lou
----- Original Message -----
From: "Carl McLelland"
>
> FACTS:
> Ole NEWTON said that an object at rest or in constant motion will continue
> to do so until acted upon by another force (in this case, acceleration or
> deceleration).
> My 2 earred knockoff's weigh approx. 23.3 ounces each.
> The total diameter (ear to ear) of the knockoff's is 6.5".
> The diameter of the knockoff base is 3.5".
> The ear height (from the knockoff base) is 1.5", so I'm assuming the
> center-of-mass of the ear to be .75" or a 5" diameter relative to the
center
> of the axle.
> The tire circumference (21" diameter) is 65.97" or 5.498'.
> At 60 mph (88fps) the tire rotates 16.006 revolutions per second or 960.35
> rpm.
> The center-of-mass of the ears has a 15.71" circumference, and at 60mph
> (88fps) travels 251.45 inches per second (20.95fps).
>
> ASSUMPTIONS:
> 20% of the weight of the knockoff is in the ears, so the weight of the
ears
> totals 4.66 ounces.
> The wheel could feasibly rotate (on the splines) during acceleration and
> braking an equal amount so this motion cancels itself, providing (1) the
> knockoff rotates with the wheel or (2) does not rotate on the hub.
> At 60mph (88fps) the center-of-mass of the ears possess 31.759 foot ounces
> (1.985 foot pounds) of Kinetic Energy.
> Drag Factor (during braking) of 0.80% for an acceleration rate of <->25.76
> feet/second/second.
> Acceleration 0 to 60 in 10 seconds for an acceleration rate of +8.80
> feet/second/second.
>
> FINDINGS:
> During constant acceleration a force (energy) of 17.468 foot pounds/second
> is generated to accelerate (LOOSTEN) the knockoff on the hub.
> During constant deceleration (braking) a force (energy) of 51.137 foot
> pounds/second is generated to accelerate (TIGHTEN) the knockoff on the
hub.
>
> These forces should remain constant until the mechanical drag of the
> metal/metal surfaces of the wheel and knockoff PLUS the hub to knockoff
> overcame the Kinetic Energy of the knockoff and prevented further
loostening
> or tightening.
>
>
This archive was generated by hypermail 2b30 : Tue Sep 05 2000 - 08:56:36 CDT