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bamboo backed and bellied hickory bow
superdav95:
--- Quote from: mmattockx on June 01, 2024, 06:56:33 pm ---
--- Quote from: superdav95 on May 29, 2024, 10:29:34 pm ---I started out with about 4.5" after glue up of the belly lams. I had pretillered this bow out to 20" after assembling the boo backing lan to the hickory core.
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Beautiful bow, Dave. A couple questions:
1) Did you pre-bend the back lam and/or core lam before gluing them up with the 4.5" of reflex?
2) It's hard to tell from the pics, but it looks like you flattened the belly lam completely, removing all the crown, nodes, etc. Is that correct?
Mark
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1. I did not pre bend the back laminations. I just heat treated them to drive out some moisture and harden it a bit. I then taper after that out towards the ends.
2. I did not flatten the belly lams I only filed down the nodes a bit. The natural crown of the strip was retained.
mmattockx:
--- Quote from: superdav95 on June 01, 2024, 11:37:41 pm ---1. I did not pre bend the back laminations. I just heat treated them to drive out some moisture and harden it a bit. I then taper after that out towards the ends.
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In that case, what does your form look like for that glue up?
Mark
superdav95:
--- Quote from: mmattockx on June 02, 2024, 01:41:24 pm ---
--- Quote from: superdav95 on June 01, 2024, 11:37:41 pm ---1. I did not pre bend the back laminations. I just heat treated them to drive out some moisture and harden it a bit. I then taper after that out towards the ends.
--- End quote ---
In that case, what does your form look like for that glue up?
Mark
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Mark, Here is a link to a video I did a while back showing similar set up for belly lam glue up. This particular one shows a horn belly lam but you get the concept. It’s pretty much the same. I tried to find some pics but they are buried somewhere. Lol. Pictured here is a set up for my back lamination using bike tubes as many have done. I add in the amount of reflex I want with clamps to the table. It’s very important to make sure everything is straight after wrapping with the tubing as it has the tendency to introduce twist and misaligned tips. The forms I used in this were ideal for horn but could also be used equally well for boo lams. The only real challenge may be the crown on the belly lams but this can be worked around to get good results.
https://www.dropbox.com/scl/fi/zdl6ek505rlo19rs3rypy/IMG_3386.MOV?rlkey=m9p5wvow806c4q63bipzzd512&dl=0
superdav95:
side view
Selfbowman:
Maybe someone from England can suggests some good linen for our flight bows.
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