Technology

A.M.O. are the inicials of Archery Merchants and Manufacturers Organization. The opening A.M.O. is the distance between the inner part of the arrow nock and the bow grip, plus 1,75 polzades to be added for getting "the window" opening.

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COMPOUND BOW MODELS
	DEFLEXED OR CONCAVE TYPE The hand support point is placed in front of the axe which aligns the points where the limbs are inserted into the bow body. It is the most reliable, exact and silent of the three models, but also is the one that less energy transmits to the arrow. The distance between the string and the farthers inside point of the grip should be between 9 and 11 inches.		STRAIGHT OR NEUTRAL TYPE The axe which aligns the point where the limbs are inserted into the bow body pass aproximately by the point where the hand supports the grip. The characteristics are intermediate between the other two types. The distance between the string and the farther inside point of the grip musts be 8 or 9 inches.		REFLEXED OR CONVEX TYPE The hand position in the grip is behind the axe that aligns the limbs screws. It is the one that more energy transmits to the arrow, but is very unstable, and any movement while releasing the arrow uncompensates it and , also it is the most noisy.. The distance between the string and the farther inside point of the grip musts be 7 or 8 inches.

COMPOUND BOW DRAW

The bow musts adapt to the archers, but never viceversa. What does it means?. That the bow's draw musts be the same that the archer's draw. Phisically, our constitution is different, so we can find a lot of different draws, and as result, one bow adapted to one archer may not be good for another one.
How can we messure our correct draw to adapt our bows to it?. Well, for that there is an objective rule, created by the Americans, and that is very accurate: Place ourselves against a wall, lying our chest on it, arms extended cross-shaped, with the palms toward the wall and the fingers united. Messure, then, the distance between the finger's point of both hands and write the result.
In our Metrical system, we will messure in milimeters, and then we will transform it to inches (Dividing the result by 25,4)
If the transformed result is 71 inches, our AMO draw will be 28 inches (basical data).
For bigger or lower dimensions to the basical data of 71 inches, we should add or deduct half inch for each inch more or less.
That is, if the dimension we have got is 70 inches, the difference to 71 is 1 inch, and so, deduct half inch to the basical data, like this:
28-0,5=27,5 inches, which will be our AMO draw.
If the dimension we got is 72 inches, the difference to 71 is 1 inch in excess, so we should add half inch to the basical data, like this:
28+0,5=28,5 inches, which will be our AMO draw.
But , to make things more difficult, the archer hands size musts be considered too: For hands with short fingers, add half inch to the draw; for hand with normal fingers the correction is not needed; for hands with long fingers, deduct half inch.
All this is an aproximation to the reality, but some adjusts must be neccesary, until 1/4 inch. Nevertheless, the archer musts feel confortable in the maximum bow draw, having the string hand surely supported on the chin, and the bow hand with the arm slightly flexioned so the tension backward doesn't tension the arm muscles, but it should be transmited directly to the arm bones.