handling a downgrade

Discussion in 'Questions From New Drivers' started by jh9597, May 29, 2014.

  1. nikmirbre

    nikmirbre Road Train Member

    Joined:
    Jul 27, 2011
    Messages:
    5,429
    Thanks Received:
    9,794
    Location:
    High Point NC
    0
    Just put it in neutral and coast down!!!!! J/k, isn't there a formula, I cant remember what it is but it involves your weight/grade of hill and some math.......

    Don't worry about other drivers, they probably have less weight than you......
     
  2. STexan

    STexan Road Train Member

    Joined:
    Oct 3, 2011
    Messages:
    14,963
    Thanks Received:
    29,154
    Location:
    Longview, TX
    0
    The "formula" could never work for many western grades. What you really need to know is the "elevation profile" of the pass top to bottom and you only learn that with experience. They are too long with too much variance in the angle as you progress. If the hill was in fact 6% all the way down, maybe a formula would be meaningful. The difference between 5% and 6% is fairly significant and you don't know if a hill marked 6% is mostly 6 or a maximum of 6. The indicated grade is not very "accurate" in many cases other then to provide a rough gauge of much of it's angle.

    But another thing is every truck has a different amount of rolling resistance, some more or less aerodynamic then others, engine brake is more effective in some trucks then others, head wind? tail wind?
     
  3. okiedokie

    okiedokie Road Train Member

    Joined:
    Jun 13, 2011
    Messages:
    12,323
    Thanks Received:
    92,114
    Location:
    PNWET
    0
    Trucker rule #6. You never know what's around the next corner.
     
    Lux Prometheus and skellr Thank this.
  4. jbourque

    jbourque Heavy Load Member

    Joined:
    Oct 25, 2012
    Messages:
    924
    Thanks Received:
    553
    Location:
    south english iowa
    0
    best advice i can give you is dont get in a big hurry, and dont forget that the jacob brake switch only costs about three bucks,made in a some other country. if i think about it can still hear the trucker yelling on the cb am i going to die on the grapevine in calf. dont let the other drivers talk you into going faster than you feel safe at. i didnt survive in trucking for as long as i did because i took chances i should not have. some of these younger drivers will say i do it all the time but that only lasts so long before you have one of those oh poop encounters. if they want to be cool let them go . be safe out there
     
  5. nsxman2001

    nsxman2001 Bobtail Member

    Joined:
    Apr 5, 2014
    Messages:
    42
    Thanks Received:
    10
    0
    Best advice is go slow and try and use the jake more then brakes.. also use the gear that keeps the truck in that sweet spot.. since your driving that 18 speed everyday only you will know the answer...
     
  6. Prolaznik

    Prolaznik Light Load Member

    Joined:
    Jul 3, 2013
    Messages:
    99
    Thanks Received:
    80
    Location:
    SD
    0
    just go fast enough to bend space around your truck and you'll be at the bottom in no time :biggrin_25525:
     
  7. Allow Me.

    Allow Me. Trucker Forum STAFF Staff Member

    Joined:
    May 28, 2009
    Messages:
    10,676
    Thanks Received:
    12,237
    Location:
    Rancho Mirage, Ca.
    0
    I'd like to make 3 points here: 1, only air can cool your brakes. 2, A 6% grade means for every 100' of travel (descending) the pavement drops 6'. 3, ALWAYS, and I mean ALWAYS, stop before you start your descent and check your equipment. That few minutes can save your life.
     
    Lux Prometheus Thanks this.
  8. STexan

    STexan Road Train Member

    Joined:
    Oct 3, 2011
    Messages:
    14,963
    Thanks Received:
    29,154
    Location:
    Longview, TX
    0
    This is an elevation profile of Red Mountain Summit in Colorado. Notice one side is more lengthy drop then the other, and one side has a misleading level-off before it starts back down again.

    [​IMG]
     
    daf105paccar Thanks this.
  9. Bry

    Bry Light Load Member

    Joined:
    Apr 16, 2013
    Messages:
    157
    Thanks Received:
    86
    0
    LOL, just coast in neutral! You are funny, but someone dumb enough to follow that advice might make you a murderer.

    "Just put it in neutral and coast down!!!!! J/k, isn't there a formula, I cant remember what it is but it involves your weight/grade of hill and some math.......

    Don't worry about other drivers, they probably have less weight than you......"
     
  10. Raiderfanatic

    Raiderfanatic Heavy Load Member

    Joined:
    Jul 18, 2010
    Messages:
    814
    Thanks Received:
    561
    Location:
    Hutchinson, KS
    0
    Seriously? I am hoping you are kidding on that. If someone follows some stupid advice, especially with a just kidding afterwards, on the internet....that's their own stupidity or ignorance. People need to take responsibility for their own actions instead of trying to push blame on someone else.

    Like I stated, don't know if you're kidding or not but.........