Bowmen of Skelmersdale

Centre of Gravity


The centre of gravity of any object is a point (not necessarily in the solid part of the object) through which the weight always acts, no matter which way up the object is. If the object is suspended from this point, the object will not rotate unless pushed.

For any other suspension point, the centre of gravity prefers to be directly below the suspension point.. Finding C.O.G

This has two implications. First, a bow will feel more stable if the centre of gravity is level with or below the grip (though its bad practice to overdo this). Second, if the bow is freely suspended from any point, the centre of gravity will be directly below the suspension point. Picking two different points, such as the top limb nock and the string nocking point, and seeing how the bow hangs from each, is the standard way to locate the centre of gravity (see above).

For most purposes, a bow will behave reasonably well with the centre of gravity within about four inches (20cm) forward of and below the grip.

There are no hard and fast rules about where it should  be, so the location is less important than which way it needs to be moved. The best guide to the best location for centre of gravity will always be the bow performance.


Bow Centre of Gravity

What bow behaviour needs controlling?

Bow  movement

Timing - When is movement important?

Time and Motion

Controlling bow displacement

Weight, Mass and Inertia

Static and Dynamic properties

The misnamed TFC

Controlling bow balance

Centre of Gravity

Finding the centre of gravity

Changing the balance using weight

Weights and Distances

Rods, weights and risers

Controlling bow vibration

Causes of Bow Vibration

Reducing Vibration - Damping

Bow Resonance

Tuned damping - more on TFC’s