im in the process of tillering my sisters bow, and i made the limbs asymetrical, with the top limb a half inch longer than the bottom one. i did this to help even out the stress from pulling more on the bottom limb when drawing,although a half inch really isnt much. my question is this; in tillering with asymetrical limbs the limbs should bend evenly right? i mean that the top and bottom and top limbs should bend the same amount. i ask because the top limb seems to be stiffer even after taking a bit of wood off to try to even them out. any help is much appreciated.
forgive me there. i mean that the limbs bend as they normally would, with the top limb bending slightly more than the bottom.
i remeasured from my nock points after removing the temporary nocks and the top limb is in fact longer by an inch, still need to know if it falls under the typical way of tillering though
i think with these ones you look for "positive tiller" which is where the distance from the string to the back of the bow, measured on a 90 degree line, is 1/4" more on the top limb than the bottom limb, at any given point out measured from the center.
yea thats what i thought, i normally build that into all my bows to keep some stress off the bottom limb and account for the actual middle of the stress not being centered. just didnt know if it would make the top limb always stronger than the bottom or not but it makes sense now.