How to calculate the road slope?
Here is everything you need to know about.
To calculate a percent slope simply you apply the following formula:
- Just take a one meter shaft, a spirit level and a plumb line. Put the rule horizontally checking with the level, and then write down how long is the plumb wire, this distance will be the searched percentage.
- Make attention don't confuse percentage and degrees. A 100% slope is a 45° slope (try with the just explained method!).
- WARNING: Gradeability for vehicles is measured in percentage, and it differs from the slope in degrees, for example, a 100% slope is a 45 degrees slope. The slope in percent and the slope in degrees are DIFFERENT.
Table of correspondence between percentages slope and degrees slope:
|Slope in percentages||Slope in degrees||Vehicle type|
|5%||2,86 degrees||all electric vehicles|
|10%||5,71 degrees||all electric vehicles|
|15%||8,53 degrees||all electric vehicles|
|20%||11,31 degrees||Alke' electric vehicles|
|25%||14,04 degrees||Electric utility vehicles ATX340E|
|30%||16,70 degrees||Electric Vehicles ATX320E|
|35%||19,29 degrees||Off road electric vehicles ATX330E|
|up to a 100%||up to a 45 degrees||Off road 4x4 vehicles|
Is maximum slope the only important parameter?
No, we must also consider how long it's such an uphill climb to overcome a 10-15 meter such as a ramp to the garage or in hospitals is very different from facing a climb of a hill.
Vehicles and slopes:
Very often our customer ask us what is the best vehicle that best fits depending on the terrain and climbs to be tackled, we here a brief summary:
|Garage ramp||All ATX 310E and ATX 320E have no problem, because they are optimized for that situation.|
|Slope of an embankment||An electric vehicle is able to deal with departures from standstill uphill smoothly.|
|Dunes slope||or sandy soils must have an Alke' off-road electric vehicle ATX 330E with trim and off road kit "Alkè sand".|
|Hilly paths uphill 400mt||n this case it becomes necessary to have an ATX 330E and we must analyze the length and terrain characteristics.|
|Dirt up and down||For the dirt road you must have an ATX 330E and you have to go and analyze the slope of the most insidious that should not be above 35%.|
|Off Road - up to 100% gradient||In this case the best vehicle is an 4x4.|
Recommendations to better tackle the slope with different road surfaces
|Slope asphalt||This slope is the easiest to address because the power required is constant.|
|Slope on dirt with holes||The presence of holes increases the slope so if you stop inside a hole is required in the event missed departure to go back.|
|Ascent steps||The steps increase the slope of the hill so if you are greater than 7 cm. necessary to construct the tracks so that the slope is constant.|
|Ascent steps with hairpin||The hairpin is the critical point of a climb as it is missing a run and also it has the maximum slope, so it is here that we must calculate the slope of the hill.|
GoPro: incredible off road electric utility vehicle challenging the Tuscany hills