Center of Gravity

[radsbow]

More questions...sorry!</p>

Regarding the centre of gravity (COG)#of your bow, where is the acceptable position, or should I say where is the normal position of the COG?</p>

And does the fact that I use the second hole on my riser (the one towards the#front of the bow nearest the target), for my pressure button have a bearing on the COG?</p>

Finally, this probably should have been the first question...does it have a bearing on your groups?</p>

[cecile]

If you have a classic bow, the COG should be around 15-20 cm from the riser and slightly below the grip.
However, the COG shall be set so that the bow has a good behaviour for you after the release of the arrow. Note also that your bow might need COG adjustment if you switch from short to long ranges shooting (due to the bow position relatively to the archer).

Using the second hole for your button will have negligeable influence on the COG.

As for grouping, it may have a bearing if the COG is not compatible with the archer technique... In my case, I enjoy quite steady bows that move a little forward before dropping. I know other archers who prefer that the bow drops rapidly.

[joetapley]

***********************
The COG should be as far forward as posssible. Impossible with current arrow materials to have it too far forward.

You should not use the 'forward' button hole unless your arrows are too stiff and you can't afford to replace them. Most modern risers have dropped the forward button bushing. Mind you, could be useful for mounting the beer glass (or cake ) holder.

COG is position is a major factor as regards arrow groups. People are prepared to pay around £12 each for tungsten points to shift the arrow COG marginally forward.
***************************
Aaaghh! Bow not arrow.
Bow COG should be as far forward as possible in theory (as regards stabilisation) but there are biomechanical considerations also so COG position (i.e. overall bow weight) so depends on the archer physique/draw length/draw weight. Hence it comes down to this vague concept of 'feel'. Top male archers can handle high draw weights and bow weights so COG further forward than an average archer.

[cecile]

Hi Joe ! I think Radsbow means the Center Of Gravity of the bow :
http://ceciletoxo.free.fr/technique/graviteang.jpg

And to help find it accurately :
http://ceciletoxo.free.fr/technique/gravite3ang.jpg

[radsbow]

Thanks#Cecile and Joe,</p>

I did mean COG of the bow, but it was still interesting to find out the COG of an arrow is#important also.</p>

My bow is an Win &amp; Win Exfeel and I am using a Win &amp; Win arrow rest, but because of its size it would not fit#in the normal button hole as it overlaped at the back, so placed it in the first hole.#My arrows are bordering on the weak side, so may have to revert back#to a Spigarelli Zero Tolerance rest.</p>

Thanks for your help.#</p>

[joetapley]

It's odd how some riser/stick-on rest combinations don't fit. Not sure who is to blame. Simple answer is to trim off any overlap or get a rest that does fit. Last resort is to get one of those daft wrap around contraptions (not recommended).