Khan wrote:Following the other topic on winching.
As mentioned, it makes sense to not exceed your bull bar / mounting rating with an overly powerful winch.
e.g.
9,500lb rated bull bar + 9,500lb winch = Good
9,500lb rated bull bar + 12,000lb winch = Possibly very bad.
Say you go with a 9,500 / 9,500 pair though. What happens if you're so stuck the winch hits its limit?
Does the winch have some sort of safety cut out at the weight or is it just the winch will fail/break before damaging the vehicle?
With engineering we have something called a "Factor of Safety"
If the winch is rated to pull 9500 Lb then that is a working load, if it has a factor of safety of 2 then it should start to self destruct around 19,000 lbs, if it has a factor of safety of 3 then is should self destruct around 28,500 lbs.
The factor of safety is calculated with breaking loads not the Youngs Modulus which is where it starts to go through inelastic deformation when it exceeds this figure, up to there it should spring back when load is removed.
When designing this sort of thing an engineer might say winch should break before bulbar therefore the bulbar should only have elastic deformation possible which means stress levels have to be below the Youngs Modulus of the materials used when subject to double the working load of the winch assuming the winch working load is subject to a factor of safety of 2.
The reality is vey few bullbars are engineered for any and all winches so your guess is as good as mine