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-   -   Measuring the Gradeability of a vehicle (https://www.team-bhp.com/forum/4x4-technical/217163-measuring-gradeability-vehicle.html)

Most of us, perhaps, know and understand what the terminology ‘Gradeabilty’ purports in 4x4 world. But what intrigues me somehow is how it is calculated for a vehicle. To rephrase it, what are the parameters taken into consideration for objective calculation of this value? Does this objective value correlate fairly in practical situation?

I thought of bringing this into a new and separate thread as the discussion was digressing from the intent of a particular thread given below.

https://www.team-bhp.com/forum/elect...ml#post4719550

Experts, please pitch in with your knowledge.

found this :
http://www.thecartech.com/subjects/a...x_gradient.pdf

explains with simple physics, how 4WD is better than RWD is better than FWD, in climbing up slopes. Also, how increasing GC helps RWD to climb, while decreasing GC helps FWD to climb.

still it doesn't explain how some offroaders are able to climb more than 45 degree slope (with the theoretical assumption that 'u' can only be <=1)

Indeed, quite a good mathematical explanation is furnished in the document you shared. But as it is said and you too agree that the gradeability of a car cannot go beyond 100% i.e. 45°, what about the following image? Obviously, it doesn't violate basic principles of physics. But what is the right explanation then and what are the exhaustive parameters to take into account for calculating the real figure?


Edit:The highlighted part says 60° slope. (It is almost masked by Team-bhp logo)

Very interesting inputs, especially for those on the forum who live/ drive in the hilly terrain of India. This will help us to learn what climbs ought to be attempted in the different cars we drive and what climbs we ought never to attempt!

A useful post from Spike Arrestor: