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  #21  
Old 04-05-2010, 09:36 AM
mhaley927 mhaley927 is offline
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Quote:
Originally Posted by Richard Martin View Post
I put a protractor in your hill. It's about 16°.
I said when i posted it that the picture doesnt do it any justice. At its steepest points its 35+, upwards of 45
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  #22  
Old 04-05-2010, 09:44 AM
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Richard Martin Richard Martin is offline
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Quote:
Originally Posted by mhaley927 View Post
I said when i posted it that the picture doesnt do it any justice. At its steepest points its 35+, upwards of 45
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.
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  #23  
Old 04-05-2010, 11:01 AM
mhaley927 mhaley927 is offline
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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)
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  #24  
Old 04-05-2010, 11:44 AM
IdahoGrass IdahoGrass is offline
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Man, you guys have some big steep "hills" out there!
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  #25  
Old 04-05-2010, 12:18 PM
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MJB MJB is offline
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Quote:
Originally Posted by mhaley927 View Post
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)
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.
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  #26  
Old 04-15-2010, 09:47 PM
jarabe1 jarabe1 is offline
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Quote:
Originally Posted by ALC-GregH View Post
Here's one for you Richard. It's not the steepest hill ever mowed but it steep enough to lose control if it's wet.
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.
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  #27  
Old 04-15-2010, 10:05 PM
FastMan FastMan is offline
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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.
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  #28  
Old 04-15-2010, 10:08 PM
cutterschoice24 cutterschoice24 is offline
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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.
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  #29  
Old 04-16-2010, 12:15 AM
topsites topsites is offline
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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:
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Last edited by topsites; 04-16-2010 at 12:22 AM.
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  #30  
Old 04-16-2010, 02:37 AM
topsites topsites is offline
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Actually I just noticed that is wrong too LOL but it really isn't calculated by angles.
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