- #1
Simfish
Gold Member
- 823
- 2
"Parking on a Hill or Incline
Vehicles with automatic transmission should be placed in the Park
position. Vehicles with manual transmission should be placed in rever
or low gear. In both cases, always set your parking brake firmly.
Uphill parkingturn the wheels away from the curb.
Downhill parkingturn the wheels toward the curb so the position of
the wheel will help hold the car.
If there is no curb, whether you are parking up or downhill, turn whee
slightly to the right so that if the car begins rolling, it will move off th
roadway.
Uphillwith curb.
Turn wheels from curb.
Up
Downhillwith curb.
Turn wheels to curb.
Down
Withoutcurb.
Turn wheels to right."
Why would you turn the wheels to the right if parking uphill WITHOUT a curb as compared to turning them to the left if parking uphill WITH a curb? I've googled for explanations and none of them explain the physical processes involved, much to my frustration. Supposedly "If the vehicle rolls, it will go off the road rather than into traffic". Yeah, but wouldn't the uphill-ness make the car roll in the direction OF traffic (i.e. towards the left?)
Oh and would a free body diagram work? It's amazingly difficult to draw in the case of two axles+4 wheels. Oh - and an additional question - how do the back wheels steer?