Laminated Long Bow Help

Boneyard Bowhunter · August 01, 2007, 05:49:00 PM

My friend has a 66" laminated long bow that has a kick like a mule. The tiller at the fade outs looks good about 1/8" + at the top. The only thing that I can find that may be causing it is the last 5" of the top limb have no curve when strung. The bottom limb does have some curve. Should he sand the glass till they both are the same.

kennym · August 01, 2007, 08:44:00 PM

Are the limbs the same width all the way along em?

Boneyard Bowhunter · August 02, 2007, 06:12:00 PM

The limbs are the same width and thickness and they both taper the same from top to bottom. The only difference is in the 5" below the string nocks. I don't have a picture of the bow.

kennym · August 02, 2007, 06:59:00 PM

Is it a glass lam bow or all wood?

Boneyard Bowhunter · August 02, 2007, 09:09:00 PM

Sorry, It's a clear glass lam.

kennym · August 02, 2007, 10:34:00 PM

Hmmmmmmm,my opinion(usually not worth much)would be to mark the bow every 6" from center both ways and check tiller at each spot. Ya may find the tiller off somewhere else just overpowering the tip?? If that makes sense..... Anybody else got ideas?

Crooked Stic · August 03, 2007, 02:33:00 AM

Do both tips look the same when unstrung? Could have been a defect in the form the bow was glued up on. Heavy tips can cause the kick.

Boneyard Bowhunter · August 03, 2007, 05:23:00 PM

We marked the bow every 4". We checked the tiller at the fades, it was good. When checked at the marks the limb width and thickness was the same on both limbs. At this point I was baffled so I took a 5" straight edge to check the bend in the limbs. There is a 1/16" space under the straight edge most of the way up on both limbs. At about 6" from the string groove it starts to lessen to 1/32" on the top. The bottom stays straight. When unstrung the tips look ok.

Boneyard Bowhunter · August 03, 2007, 05:27:00 PM

O-O-PS! The top limb stays straight at the tip, the bottom has bend. I'm confusing myself now.

D. Johnston · August 04, 2007, 12:09:00 AM

Lay the bow on a piece of paper and trace the limb profile onto the paper using a pencil. The string is your base line. Flip the bow end for end and now trace the other limb using the string as a baseline right on top of the first limb tracing. I would bet there is a big difference in the profile of the top and bottom profiles. If the tips are too heavy that can cause excessive handshock as well, but I would guess your bow needs some fine tuning on the tiller.