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Winching formulae:
Where:
W – weight of vehicle
S - surface to be transited
G - angle of gradient (in degrees)
TW – amount of wheels
DW – amount of broken wheels
Example:
Car with the total weight 2500 kg, pulled in the best conditions on the flat and hard
surface, with the angle of gradient 5 degrees and with 4 working wheels:
According to above calculations:
W = 2500 kg
S = 1/25 (hard road)
G = 5 (angle of gradient)
DW = 0
TW = 4
So:
kg
If the same car with the total weight 2500 kg will be pulled on the gravel and the
surface with the angle of gradient 30 degrees with two working and two damaged
wheels, we will need effort required:
W = 2500 kg
S = 1/5 (gravel)
G = 30 (angle of gradient)
DW = 2
TW = 4
Winch load can be lower than the needed strength to pull vehicle ( max load pull
is only for the 1 st layer of the rope on the drum). We can solve the problem by
pulling out all the rope and leaving only one layer on the drum, or by using the
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