I built one of these 20 years ago and had the itch to do another. Probably won't build another one but it came out nice and should be a pleasure to shoot at 37 pounds. Riser is Canarywood with Granadillo, Brazilian Ebony, and Spalted Maple. Limbs have Action boo cores, Stabilkore and Brazilian Ebony wedges. Waiting for the string to show up for some string photos.
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I like that one, great job!!
I like that! Nice lines.
Looking good.
:thumbsup:
Nice... Have you shot it through the chrono??
Great looking bow!
Nice draw profile and string angle :thumbsup:
Looks like a shooter to me.... Kirk
Got her strung up tonight. Nice and compact with a sweet, smooth draw. This one is going to my 75 year old father. It would truly complete the cycle to have him take a deer with it this fall. [attachment=1][attachment=2]
I'm not a big fan of the belly mount TD design myself, but you have a very nice looking set of limbs on that bow. Excellent string angle , and the way she's bending is sweet. Great job on this my friend. Congrats :thumbsup:
Kirk
X2 on the belly mount
What is the reason for a belly mount
Just thought I'd build one. I don't care for the looks of them either and it will likely be the only one I build.
:thumbsup:
Quote from: JGR1269 on April 06, 2022, 12:18:55 PM
Just thought I'd build one. I don't care for the looks of them either and it will likely be the only one I build.
When i suggested using a power lam and extending your fades i thought id follow up and show you what it does to your limb. This bow im building here is only 60" long and this photo is a 28" draw next to your limbs. My wedges are 10.5" long.
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In this link below it shows brace, 28" & 32" draw.... About 2.5 PPI from 28" to 32" 41.5 @ 28" 51.5 @ 32" Seriously smooth draw from 28" to 32"
https://photos.app.goo.gl/sddSMTyWUD2ekWgXA
Very nice! I like it!
Thats a great looking bow. Nice complementary colors, not distractingly flashy. It also looks good proportionally. Must be the forward handle, because it looks exactly like what it is, not a 3 piece trying to imitate one piece.
It occurred to me while admiring this bow, that a three piece is in addition to being a bow, is also two first order levers.
The typical style with limbs mounted on the backside, would have the fulcrum located at the end point of the riser and the load would be at the attachment bolt, pushing it outwards. The forward handle style would have the fulcrum at the attachment bolt and the load pushing into the riser block.
I'm not making an argument that one is more optimal than the other. It would be a matter of where you want the most force applied.
Quote from: Flem on April 08, 2022, 11:38:17 AM
It occurred to me while admiring this bow, that a three piece is in addition to being a bow, is also two first order levers.
The typical style with limbs mounted on the backside, would have the fulcrum located at the end point of the riser and the load would be at the attachment bolt, pushing it outwards. The forward handle style would have the fulcrum at the attachment bolt and the load pushing into the riser block.
I'm not making an argument that one is more optimal than the other. It would be a matter of where you want the most force applied.
These belly mount limbs often need two limb bolts to keep that limb from lifting off the riser pad. I don't think where the force is applied really matters much .
I know a couple bowyers that played with this design a lot and the advantages they saw were the forward hand placement allowed a much lower brace height and almost a flat limb pad angle. One bowyer was building the riser from Elk Antler. Those were cool looking.
I never played with this design myself, because I'm not fond of the monster wedges needed or the looks of them....I was always nervous of those limb bolt inserts pulling out. Kirk
Actually I am reconsidering my original observation, I'm thinking the forward handle might be a second order lever with the fulcrum being the end point of the limb :dunno:
"Most force applied", was poor wording on my part. Where the most force is tolerated, is more appropriate.
Another advantage to extreme forward grip placement is that limb travel distance can be reduced, and the point in the draw the string lifts off the recurve increases. Take a good look at Border Bows riser and limb designs. ( i'm not going to go into that debate on "Lift off" that gets hairy. )
A lot of guys argue that saying, "Hey! Drawing 28" is drawing 28" regardless of where the deepest part of the grip is located." But.... If you think about it. Moving that grip forward 2", you can theoretically lower the brace height the same amount and increase the preload considerably. Of course you would still need to adjust the limb pad angle so you don't go too far.
That's where an adjustable riser comes into play. With each different limb design, you have a different working limb location, and length. Each different limb design has a sweet spot where the preload on the limbs top out as you lower the brace, then it goes down hill if you continue to lower the brace and straighten the limb out...... Once you find that sweet spot on your new design, whether it be by feel and actual testing, or using an inline scale, then I measure from the string back to the riser block and mark 7.5" as the deepest part of the grip. That determines the best forward placement for my grip.
The reason i go 7.5" is that it still gives you room for brace height adjustment without getting that brace below 7" . I don't know about you guys, but if my brace gets down below 6 3/4" i struggle with arm clearance issues. I much prefer a 7 1/4"- 7.5" brace for hunting.
Hey Flem..... What's the importance of your fulcrum point subject on how a bow performs? Just curious..... Kirk
My curiosity is mostly esoteric. I work off the premise that every material and mechanical factor that comprises a bow, while individually might not have a measurable impact, cumulatively they will. Makes it easier to identify the compromises, or enhancements being made by design and material choices.
Quote from: Kirkll on April 08, 2022, 01:10:18 PM
Moving that grip forward 2", you can theoretically lower the brace height the same amount and increase the preload considerably. Of course you would still need to adjust the limb pad angle so you don't go too far.
I have the same Idea
Quote from: Mad Max on April 08, 2022, 05:07:03 PM
Quote from: Kirkll on April 08, 2022, 01:10:18 PM
Moving that grip forward 2", you can theoretically lower the brace height the same amount and increase the preload considerably. Of course you would still need to adjust the limb pad angle so you don't go too far.
I have the same Idea
It might be fun to play with an extreme forward placed grip on a radical RC design without doing the belly mount.
I've actually did a drawing quite awhile back on a one piece bow that never did come together, and basically became a shop door decoration. The limb design wasn't really correct for the forward grip location.
I think i'd want to do something with a larger radius hook with a semi static tip design so the hook would only open to a certain point, then shift into static mode.... A two stage draw cycle is an intriguing idea i've been kicking around in my head, but never played with. It would make an interesting looking DFC chart if nothing else. :readit:
Kirk
I got the idea from a Binghams 1 piece recurve I built but with a little more forward handle
(https://i.imgur.com/EHQZNr6.jpg)
Here is that old drawing I used to design a bow years ago, but never built the forward grip version.
https://photos.app.goo.gl/e9mZVNXxzPbaWbpJ7
:thumbsup:
Kirk - why the asymmetry end to end from the centerline on that riser?
Quote from: onetone on April 09, 2022, 06:29:37 PM
Kirk - why the asymmetry end to end from the centerline on that riser?
Limb balance, finger placement on string, pivot point ,and shelf height all come into play. I just got though writing a long winded explanation of this and my iPad died...
I'm not up for re writing it.... But with straight long bow grips or dished shape where guys are heeling down on their long bow riser, I use a slightly lower shelf and centerline to balance the pivot point without using a positive tiller adjustment . Kirk
Thanks :thumbsup: