|
A 7% grade downhill coasting will get you way over the speed limit. Coming back from Va Tech there is a similar grade fro close to that distance. Behind a big rig, I was using 5th and DFCO to slow down from 85 MPH. The rig was sucking me into his rear end. I think I could have got close to 90 in clean air. Dropping 7 feet vertical at 65 MPH (100fet per second) at 75 (speed limit 70) you aredropping vertically about 9 feet a second, about 36-40 HP in energy to add to your speed.
Climbing a 7% grade in WVa my Scion XB wasrunning 4 k RPM and down shifted two gears.
regards
Mech
|