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Old 01-25-2012, 04:37 PM   #12 (permalink)
sendler
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Quote:
Originally Posted by p38fln View Post
You have a good point about semi's not being able to stop as fast as cars, but NHTSA is trying to change that. I think they're trying to cut the stopping distance in half, from 600 feet to 300 feet at 65 MPH.

It's very doable, a fully loaded semi has the traction to stop faster, but not enough braking power. The current favorite is switching the drums that 99.9% of semis have for disk brakes.

All i'm saying is don't assume that the trucks will always take as long to slow down as they do now.
Trucks brakes can already lock up now. Unless you get into a runaway heat build up problem as when descending a mountain. The limiting factor of an emergency stop is mass vs contact patch and friction parameters of the tires. Unless they add a bunch more tires and sacrifice high tread life for traction with softer rubber, the stopping distances of big trucks will stay as it is.

Last edited by sendler; 01-25-2012 at 05:14 PM..
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