Who Has Mowed Steepest Hill on a Zero Turn Rider?

Discussion in 'Lawn Mowing' started by mhaley927, Apr 4, 2010.

  1. mhaley927

    mhaley927 LawnSite Member
    Posts: 129

    I said when i posted it that the picture doesnt do it any justice. At its steepest points its 35+, upwards of 45
     
  2. Richard Martin

    Richard Martin LawnSite Fanatic
    Posts: 14,700

    You do know it's very difficult to just walk on a 35° hill, let alone ride a ZTR on one, right? The steepest banks in NASACAR are 33° and the track crew has difficulty walking up those. Trucks slide sideways down them.
     
  3. mhaley927

    mhaley927 LawnSite Member
    Posts: 129

    Not a NASCAR fan, but an ME student trying to pay his way through college. I know angles all too well.

    Check this video ( http://www.youtube.com/watch?v=HkhkpHKVWHg ) out at 7 minutes.... maybe i'm off but it looks around 30 to me. His bad boy seems to have no toruble with it.

    And here is a pic just so we have something acurate to compare to... Still, despite the previous bad photography. I would call the hill (the steepest part, not including the decreases in slope at the top and bottom) between 30-35. I just want to know if anyone has ever mowed anything close to a 35 on a rider and how. (Special thanks to mathisfun.com)

    angles.jpg
     
  4. IdahoGrass

    IdahoGrass LawnSite Member
    Posts: 27

    Man, you guys have some big steep "hills" out there!
     
  5. MJB

    MJB LawnSite Silver Member
    from Wa
    Posts: 2,869

    Start out creeping downhill and let the hydros hold you back. Let it gradually increase in speed and DO NOT try to slow it down or you will start sliding. If that happens you have to speed up and regain traction and let the hydros hold you back. You need 25 ft at the bottom to slow down gradually don't want to wreck your pumps.
     
  6. jarabe1

    jarabe1 LawnSite Member
    Posts: 69

    That looks pretty flat to me, If is wet and you slide down is because when you are going downhill all the traction and weight goes to your front wheels. If you mow side to side or diagonal it will help.
     
  7. FastMan

    FastMan LawnSite Senior Member
    Posts: 782

    The steepest hills are best done by driving straight up, the backing straight down. It keep the weight/traction on your drive wheels. Doing the opposite, as you asked about, is a recipe for disaster. You'll never make it up, and you'll be a run away train going back down. Going sideways you risk tipping, and you'll leave more slip marks in the turf. Sideways can be good, but there comes a steepness threshold where the technique needs to be abandoned.

    Doing steep hills on a ZTR is one of those, "don't try this at home" deals. It takes practice to learn the limitations of your machine and ability, and the learning curve can be harsh.
     
  8. cutterschoice24

    cutterschoice24 LawnSite Member
    from Fl
    Posts: 125

    i mow some pretty steep hills and but i would have to see some pics of the hill i prefer the scag 48 lets some pics.
     
  9. topsites

    topsites LawnSite Fanatic
    Posts: 21,654

    Slope is not calculated as an angle,
    slope is calculated as a ratio.

    Slope
    The slope of a line is the steepness of the line.
    It is measured as the change in Y associated with a change of one unit on X.

    For example, a line with a slope of 0.5 involves a change of 1 on the X axis associated with a change of 0.5 on the Y axis.
    So as X changes from 2 to 3, Y changes from 3.5 to 4.
    Lines with positive slopes go from the bottom left toward the upper right.
    Lines with negative slopes go from the upper right to the lower left.

    In the below graph, m gives us the actual steepness of the slope:

    the-slope.jpg
     
    Last edited: Apr 16, 2010
  10. topsites

    topsites LawnSite Fanatic
    Posts: 21,654

    Actually I just noticed that is wrong too LOL but it really isn't calculated by angles.
     

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