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Boo backed hickory bow based on Arvin’s design.
Kidder:
Fantastic bow Dave! How much of the reflex was glued in vs heated in?
simk:
Great work Dave! For sure impressive reflex like many of your bows. Sure fast. Is that amount of reflex durable, how long? Just asking because I'm usually not capable to preserve that much reflex in a wood-only bow,...I dont even try anymore :) My conversion rate is low, I usually can only keep 20-30% of the glued in reflex, the more the less... :) The fulldraw pic is strange...do you tilt the bow in your hand to the side? Lower limb looks way shorter than the upper one with all the bend concentrated midlimbs.... I'd love to examine that true money shot.
cheeers
superdav95:
--- Quote from: simk on July 04, 2023, 03:42:49 pm ---Great work Dave! For sure impressive reflex like many of your bows. Sure fast. Is that amount of reflex durable, how long? Just asking because I'm usually not capable to preserve that much reflex in a wood-only bow,...I dont even try anymore :) My conversion rate is low, I usually can only keep 20-30% of the glued in reflex, the more the less... :) The fulldraw pic is strange...do you tilt the bow in your hand to the side? Lower limb looks way shorter than the upper one with all the bend concentrated midlimbs.... I'd love to examine that true money shot.
cheeers
--- End quote ---
Thanks so much Simk! Yes I was very impressed at how much reflex these bow maintained. Both bows were similar in length only difference is that the one with the handle laminated sections (give away bow trade bow) was only 1.3” at widest point while this one was around 1.4” wide. Both started as seasoned hickory staves that had a deep heat treatment bake. I decrowned the back of both to about 1/2” thickness thereabouts on limbs. This allowed me to keep more of the darker belly I suspect. It was a chance that I took wondering if it would be too weak in the end but it was pretty bang on. Good guess I suppose. The stave blanks prior to glue up looked pretty flimsy. I also kept my boo slats very thin. My worry was it overpowering the hickory. So going thin thin moved the neutral plane to a favourable spot in the limb I suspect. I tapered the boo like you would normally do thicker at the handle section and tapered out to the tips. Thickness at the tips were around just under a tenth of an inch. .090. The handle are was around .120-.130”. On these bows I did the glue up on the blank and then tillered it. I did a very basic floor tiller prior to decrown of back in prep for glue up. The glue I use isn’t anything special just the ea 40 smooth on. I do a 2:1 (2 parts A to 1part B) mix according to the mix labels on the can. I don’t find I need to hot box the glue up either. Don’t find it made any difference for me. I glued in 5” reflex on these ones and amazingly they kept 4-4.5”. I’m not sure how as I too have had issues with this maintaining that much reflex after glue ups. These two bows are a different animal for some reason. The only thing I can think of that I did little differently on these two was that I toasted the belly of boo strip. I noticed that as I did this it swelled up a little to the point where I needed to Re flatten them on the belly for glue up. My boo is also not from prepared 2” wide slats. Not sure if this has anything to do with it but I use large mosso poles that I get in 10 foot lengths. I prepare my own slats. It’s more work and I can’t see it being a thing that makes any difference but one wonders. Obviously taking into consideration the node placement along the limbs which you already know is I think important too.
As to the pics ya they are not great. I am canting the bow slightly it appears. The top limb is an inch longer but ya the bend in the pic looks weird I should try and get another one posted. My wife was in a hurry too so I took what I could get. As far as durability I sure hope so :). Time will tell I suppose. The one bow has aprox 200 shots thru it and the other has around 160. The narrower one at 27” and this one at 28”. As a point of interest the narrower one holds slightly more reflex for some reason. Both bow creep back to around 4-4.5” after unstringing for around 10-15mins. Hope this clarifies some things anyway. Thanks for Looking. Dave
Stixnstones:
It looks fast as all get out just sittin still
Juan Ant. Espinosa:
Ufff... nice bows all arround. Congratulations for such a fast, agresive and beautiful bow.
For sure, a video about the bamboo side dying would be fantastic.
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