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Originally Posted by Rik I'm not quite sure what you mean by that. Decreasing the length of the valley (on it's own) won't increase arrow speed. And you can pull as hard as you like against a set of stops without adding to the energy you put into a shaft. Hell, put a ton of weight in there - it won't have any effect unless the string moves at that weight.
You can increase speed by increasing the length of time the peak weight operates for (think "hard cam"...), which quite often leads to a narrow valley, but that's not the same thing at all. |
Rik, Decreasing the length of the valley will increase the speed in the same way that lowering the let off will. By having a shorter valley or a lower let off, you increase the initial accelaration of the string, which in turn affects the energy pumped into the arrow and hence the speed.
It's like you being sat stationary at a set of traffic lights, the bloke next to you in exactly the same car that's still doing 5 mph when the lights change is always gonna beat you cos the initial accelaration is faster for him.