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ROAD SLOPE

To calculate a percent slope simply you apply the following formula:

If I cover one meter and I rise 30 cm the percentage of slope is 30%.

In practice how to do? 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 thesearched 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 indegrees 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 vehicles15% 8,53 degrees all electric vehicles

20% 11,31 degrees Alke' electric vehicle25% 14,04 degrees Alke' electric vehicle

30% 16,70 degrees Alke' electric vehicle35% 19,29 degrees Alke' electric vehicle HT

40% 21,80 degrees Alke' electric vehicle HT45% 24,23 degrees 4wd XT electric vehicle 

50% 26,57 degrees 4wd XT electric vehicle 

55% 28,81 degrees 4wd XT electric vehicle 

up to 60% up to 30,96 degrees Off road 4x4 vehicles

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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 terrainand climbs to be tackled, we here a brief summary:

slope - electric vehicles test - ALKE ATX 200E - waste collection vehicles 

Parameters  Description 

Garage rampAll Alkè ATX200E and ATX 100E electric vehicleshaveno problem, because they are optimized for that situation.

Slope of an embankmentAn electric vehicle is able to deal with departures from

standstill uphill smoothly

Dunes slopeFor sandy soils must have an electric vehicle or 100EATX ATX200E with trim and off road kit "Alkè sand."

Hilly paths uphill 400mt.In this case it becomes necessary to have an electricvehicle ATX 100E or ATX 200E with HP25 power kit,

and we must analyze the length and terrain characteristics.

Dirt up and down

For the dirt road you must have an electric vehicle ATX

ATX 100E or 200E with SUV attitude and you have to goand analyze the slope of the most insidious that should not

 be above 30% if it is between 30% and 40% becomesneed the kit HP25.

Dirt track - up to 60% gradient In this case you need the vehicles Alkè Kubota Atx100Dk or 200Dk.

Off Road - up to 100% gradient In this case the best vehicles is Alkè 4x4

Table: Recommendations to better tackle the slope with different road surfaces. Do not underestimate these

parameters.

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Slope  Description 

Slope asphaltThis slope is the easiest to address because the power required

is constant.

Slope on dirt with holesThe 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 greaterthan 7 cm. necessary to construct the tracks so that the slope isconstant.

Ascent steps with hairpinThe hairpin is the critical point of a climb as it is missing a runand also it has the maximum slope, so it is here that we must

calculate the slope of the hill.