Compsand Materials

[stoneburner]

My (past) calculated and George Gall’s measured Gs.

As a high school football player (18 years old), I could leg press 600 lb vertically — multiple times per set. I weighed 152 lb.

@stoneburner

a = v^2/r, where a = acceleration,*** v*** = velocity and r = radius

Earth’s gravitational acceleration is 32 ft/second per second. Times 3 = 96. So if my calculations are correct, a turn/cutback with a fixed radius of 10 feet at 21 mph will produce centrifugal/centripetal acceleration of 96 feet/second per second. Apparent rider and/or board weight will be 3 times greater than stationary (gravitational) weight.

@PlusOneShaper

In the late 80’s I used calibrated clay rods called PlastiGage

under a sheet of plastic, went out and spiked a solid bottom turn and came in. The amount of PlastiGage

deformation resulted in a loading of about 4G or just under.