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Tillering after removing twist
Pat B:
Was the twist in the limb before or only when you drew the bow? Maybe your thickness was uneven from side to side so it twisted as you drew the bow. Was the heated area completely cooled before you drew the bow. If not that could cause the hinge and take it out of tiller.
If the limbs were well tillered before you heated it you could put it back on the form, reheat both limbs and leave it clamped to the form over night.
Groucho:
Thanks Nonback and Pat. I posted some unbraced pics. You can see the hingy thing on the right side and that the string still isn't centered - but it's much improved :-)
It was 45lb before I started all the heating changes. Now I'm concerned about taking it to a full draw as the left limb is stronger. I'm not concerned about beauty, I just don't want it to fail.
Groucho:
Other unbraced
NonBacked:
Groucho, thanks for the profile pictures. They give a much better indication of the situation. Do you have a scale to determine the mass weight? Also, what are the specs? It looks like about 62in. long and pulled to about 20in. on the tiller stick. Did you pull it to full draw (26-28in.) when you measured the 45lb?
*** First Fact: A bow is worthless if you can’t shoot it, and you can’t shoot it if you can’t string it. ***
So, you need to…
1. Verify, as Pat suggested, that the limb thickness is even across the limbs for the full tapered length. Both limbs don’t have to be the same thickness, but they should be fairly close.
2. Get the knocks into alignment…pretty close to the centerline through the handle.
3. If you had to flatten the limbs side-to-side, re-string the bow and check the tiller. If it’s close enough to pull to 14in, estimate the draw weight. If it’s lower than you want to pursue, put it in the corner and start another one.
4. If the weight is OK and the tiller profile at 18-20in. is somewhat even, go shoot it. Note: Breaking-in a bow requires “baby steps”. Don’t pull it to full draw on the first shot. Start at 10-12in. for 5 shots and eyeball the tiller. Then pull to 16-18in. for 5 shots and check the tiller.
5. If the tiller is unacceptable, post some more pictures so we can see the status. Most likely, you’ll need to start on the Right Limb, where Eric suggested. You already know that re-tillering will lower the draw weight a certain amount.
Groucho:
Thanks Nonbacked. It's 64" and I checked the thickness. The only area where it is too thick is the hingy thing. I wanted to leave it thick as it looks scary. I checked the weight at different draws:
draw weight
13 11
16 17
19 20
20 25
the weight increase looks steep in the last inches but not sure how to estimate final weight.
It looks really wonky when its braced so I think I'm going to heat out the hingy thing.
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