COMEUP Automotive Winch (Ver:00) - Manual (Page 11)

Winching Principles
10
For example, if a vehicle weighing 3,000 kg is winched up an incline by 100% on the marsh road,
the above formula would be used as follows:
Where Wt: 3,000 kg, S: 0.52 G: 0.71
RPF = (Wt X S) + (Wt X G)
= (3,000 kg X 0.52) + (3,000 kg X 0.71)
= 1,560 kg + 2,130 kg
= 3,690 kg of effect required to recover the vehicle.
Securing Anchor Point
When choosing an anchor point, select a safe and firm point such as a tree, stump or rocks. If
using a winch to retrieve another vehicle, the rescue vehicle is considered the anchor point and
should be made secure.
The anchor point must be strong enough to hold the gross weight of the vehicle and be positioned
to keep the fleet angle between the centre of the anchor point and the wire/synthetic rope
maintained less than 15°. Always use a tree trunk protector strap to prevent ring barking the tree
and damaged to the wire/synthetic rope.
Winching V.S. Hoisting. A pulling winch should not be used for lifting.
Please refer to our website to view our full range of lifting winches.
A gradient of 10% is a rise of one
meter in ten meters (High / Distance)
Slope
High
Distance