Primitive Archer
Main Discussion Area => Bows => Topic started by: brownhillboy on January 09, 2010, 06:59:36 pm
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I finally got around to finishing the last of the 4 bbi blanks that I got from knightd last spring. This bow is pretty light, but still suprisingly fast and a real pleasure to shoot. The riser wood consists of marble wood, shedua, cannary, a wood we're not sure of and an osage power lam. This bow was made from one of David's high reflex/deflex blanks. I used cocobolo for the tip overlays, and two different shades of brown leather dye to do the back of the bow. The bow is about 60"ntn and 43#@28", but with the help of one David's wife's fast flight strings it still spits out a 430gn. arrow at 160fps. That's with the string silencers and my clumbsy fingers for the release. I know that's not as much as David can get out of them, but it's one of my fastest yet. I apologize for a glare on some of the pics, but hope you enjoy looking anyway. Let me know what you think.
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Here's a few more.
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wow,that is a slick looking bow...great work..john
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Sweet Bow John...I have always iked Davids Glue Up's...one of these Days I am going to break down and buy one from Him....maybe as soon as make sure that He aint sendin me one for all the Cholla I sent Him.......... ;)
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Thanks John and El D. By the way El D, my name is Brad. ;) Sounds like you're hinting just a little to David.
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Thanks John and El D. By the way El D, my name is Brad. ;) Sounds like you're hinting just a little to David.
Hello Brad...the name is Michael...... ;).....as for hinting...........naw..not me......... :-X
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very nice bow
i too have been thinking about getting one of his glue ups
but i cant seem to find the time to work on bows anymore
to much rock caling me all the time ;D
but ya never know.i may just get one by summer
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I've been wanting to make one from a blank, if yours is a David K blank from Primal Need I know just whre I'm going to get in from now , Awsome looking you have there.
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Brad you did a fine job on that one.. ;).. El D I'm sure we could work out something... ;D
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Very nice, I need to finish mine.
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Great tiller on that bow, well done.
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Nice work, Brad. Sweet looking bow.
I got mine already finished! ;D 8)
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Thanks everybody! I appreciate it.
Ghost308 and sailordad- if you get one from primal need, I don't think you will regret it.
PatB- you are one of the lucky ones! ;)
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Looks good!
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Sweet bow and ya Davids blanks are nice :)
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Beautiful work. You may, however, want to keep an eye out on those tips. It looks like you cut across the grain and I've seen tips like that fail by coming apart at a ring.
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Always got to be a Party Pooper in the Bunch............. ;)
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Super job on this one. Bookmarked under January laminates for BOM if you don't mind.
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Always got to be a Party Pooper in the Bunch
I'm not trying to rain on anyone's parade EL. But I've seen 3 tip failures in the last 2 months due to improperly aligned grain. Here's a picture of a tip that I fixed yesterday for a buddy. It was cut across the grain just like the one pictured on this bow. The reason I even said anything is because these kind of failures can take the whole bow with them. Which would be a real shame in this case because it is an excellent bow in all other respects. If it were me, I would replace the tips with ones in which the grain ran lengthwise and is edge oriented. Sure, it may be not fail the way it is, but why take the chance with such a nice piece of work.
(http://mysite.verizon.net/res0oeio//Misc/BadTip.jpg)
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Good eye Gordon, I was getting ready to mention this.. This bow looks very sweet Brownhillbilly and I mentioned to Vt Climber to take a look at your tiller since they are very similar bows...
Rich-
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OK....My Bad....I see what you are talking about now...the opposite grain orientation didn't worry me so much on the Overlay ...untill I seen that the Bamboo has been beveled completely off under the Overlay also...so that there is no Backing under the Overlay right where the String lies....and if the Tip flexes at all it can split the Overlay due to the grain Orientation....I must pay more attention in the Future...plus Gordon...you know I was just Teasing ....dontcha...... >:D
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Thanks for the concern guys. Is there any point at which I can assume that it's safe? How many shots did it take before the failures you have seen? This one has been shot probably 100-150 times and that cocobolo is some tough stuff.
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Brownhillboy....where in South Central VA are you? I am in Blacksburg..
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brownhillboy,
The tip on my buddy's bow failed after about 200 shots. The other two tips failed during final tiller. Unfortunately there is no way to know for sure when such a failure might occur. Yes, cocobolo is quite hard, but the failures that I saw involved tips that were made from tropical hardwoods similar in density to cocobolo. The one thing in your favor is that the draw weight is rather light so there is not as much strain on the string groves as with the circumstances that I encountered.
The problem is if such a failure occurs at full draw, the bow is likely to be severly damaged. It is not difficult to repair a tip, why take a chance like that?
Gordon
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El, I agree that a flexing tip will increase the odds of a failure for the reasons you state. A flexible tip can cause a tip to give way even if the grain is properly aligned. That said, I experienced 2 failures on tips that did not flex - the string simply sheared through a growth ring. Now in both of those cases the the draw weight was rather high (80+), and the tips were oriented such that their backs were plain sawn. But even so, it does illustrate the design vulnerability of aligning the tip growth rings parallel to the force vector of the string. It's just not a good practice if one strives to build safe and durable bows.
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I Concur........ ;)
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that looks scary fast.
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I have to agree with Gordon ::) ;), I just had a cocobolla tip let go and it did it while it was strung and leaning against the wall. I had shot it a bunch and didn't pay attention to the grain orientation. The string cut the knock like a saw.
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Gordon, does it make any difference that the bamboo and ipe do extend underneath the string groove? There's not a lot of bamboo still there, but a little and there's plenty of ipe under it.
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Oh yeah, vtclimber, I'm ijust outside of a little town called Ferrum, which is between Roanoke and Martinsville.
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You're probably okay with a lightweight bow. But I wouldn't make a habit of constructing your tips in that manner, particularly if you get into heavier weight bows.
BTW, I think you did a great job on the tiller.
Gordon
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Beautiful bow,very nice job on all of it. :)
Pappy
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I know where Ferrum is! We oughta get together at some point. I got a nice hickory log that has been drying for about seven years. We can prolly get three bows out of it if careful. I get down your way a good bit throughout the year.
That is one hell of a nice looking R/D BTW.
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Thanks for the tip Gordon, I had never even thought about it. I'll be certain not to do that again. vt climber, that sounds like a good idea to me...as long as you can take 2 young boys talking your head off! PM me sometime. Thanks for the compliments too.