There is just something about a long bow....Finished Photos

[Kirkll]

No its not correct. I had to go do a mock up to see what was happening. The farther out on the limb that the fulcrum is placed, the more acute the angle is at the string nocking point.

My apologies for dragging you guys thru my brain fog. I should have done a mock up from the get go

No worries bro.... it's hard to wrap your head around these things sometimes until you actually play with it.

Otherwise two bows with the same length limbs and strings, could not have different string angles at the string fulcrum, no matter where they bend, as long as they are being drawn to the same distance.

I don't think that is correct, but I have never worried about the string length so I can't say for sure.


Mark

Mark,
This is something you should definitely play with.... Limb pad angles and string length changes can do unbelievable things to your limbs performance. If you want to get into measuring string tension with an in line scale to determine the best pre load setting for the particular limb design, you can go down that rabbit hole if you like. It's interesting... But you can accomplish the same thing just trying different string lengths, watching your limbs bend on the tiller tree, then adjusting the location of the deepest part of the grip to a user friendly brace height.

That's the thing you need to do first when playing with string lengths is forget about actual brace height. Concentrate on getting the most out of your limbs first, THEN measure from the string back to your riser block and mark it 7" or 7.5".  Working with an adjustable riser makes prototyping limbs a lot easier.

Kirk

[Jeff tech]

62 in 3-piece longbow 🤣 really.? Just giving you a s*** bud. A real longbow is at least 66 to 68 and 70. Looking good though. A short longbow hmmm. Here is one I'm trying to finish up someday. It's all in. It's final coats of epoxy sealer. It is 68-in Looooongbow. JF

[Buggs]

Short- Longbow??  Lets see......... that would make it a Shlongbow


"There is just something about a Shlongbow"

[Kirkll]

Short- Longbow??  Lets see......... that would make it a Shlongbow


"There is just something about a Shlongbow"

  I about spit coffee all over my lap top reading that bro. A   "Shlong Bow"?

62 in 3-piece longbow 🤣 really.? Just giving you a s*** bud. A real longbow is at least 66 to 68 and 70. Looking good though. A short longbow hmmm. Here is one I'm trying to finish up someday. It's all in. It's final coats of epoxy sealer. It is 68-in Looooongbow. JF

Actually i tried like hell to get the owner to go to 64", but its his bow.....He wanted 62"...

What type of wood is your riser? Is that B&W ebony?  Or is it Marble wood?   That's beautiful! 

[Jeff tech]

Kirk it's Black and White Ebony I beam with gaboon ebony. Amber actionboo core with black and white ebony veneers. JF

[Buggs]

I just hyphenated short and long

[mmattockx]

But you can accomplish the same thing just trying different string lengths, watching your limbs bend on the tiller tree, then adjusting the location of the deepest part of the grip to a user friendly brace height.

Kirk, thanks for the ideas.

I'm making all wood bows for the time being and tinkering with laminations and Perry reflex type preload in the glue ups, but I will try different string lengths on the tillering tree on my next bow and see what that does to the bend. Being all wood, nothing is adjustable on my bows, but I can always learn a few things and then incorporate the lessons learned on the next bow.


Mark

[Kirkll]

But you can accomplish the same thing just trying different string lengths, watching your limbs bend on the tiller tree, then adjusting the location of the deepest part of the grip to a user friendly brace height.

Kirk, thanks for the ideas.

I'm making all wood bows for the time being and tinkering with laminations and Perry reflex type preload in the glue ups, but I will try different string lengths on the tillering tree on my next bow and see what that does to the bend. Being all wood, nothing is adjustable on my bows, but I can always learn a few things and then incorporate the lessons learned on the next bow.


Mark

I have known a few guys that were really into building board bows, and while it's true you can only do so much once you have the bow on the tiller tree, there are many adjustments that can be made laying up each bow.

Different types of materials used, taper rate, and power wedge locations are some of them. using tip wedges or even reverse tapered lams is another. The geometric shape of your form can sometimes  be altered with inserts rather than building new forms too.....

Everything is adjustable if you feel like exploring and tinkering with things. Some of my biggest discoveries came from an oooops during the lay up process, and efforts made to save a set of limbs.   Deeper core narrow limbs are good examples.      Have fun... That's what counts.     Kirk

[Kirkll]

Finished product....

[attachment=1][attachment=2][attachment=3]


[attachment=4] [attachment=5]

Photo album photos

https://photos.app.goo.gl/JYFQEUyrVrwEDUJZ9      Kirk

[Mad Max]

Is that your short long bow

[garyschuler]

So it's a Hybrid longbow. I made a few of them. But I grew up shooting a 68" ASL or Semi American longbow. I just prefer them over anything. How is your boat coming along. I've had 2 of those Alpha Gen 1's and make sure you keep an eye on the hose clamps and bellows. In Salt water I change the water impellers every 2 years regardless. Nice looking bow!!!

[mmattockx]

Different types of materials used, taper rate, and power wedge locations are some of them. using tip wedges or even reverse tapered lams is another. The geometric shape of your form can sometimes  be altered with inserts rather than building new forms too.....

You've got that right, the combinations are near infinite even without adding fibreglass lams into the equation. Good thing I'm not in a rush and it's all just a big experiment.


Mark

[Buggs]

Nice bow Kirk   I like the riser to limb buttressing, not seen that before. Cool design.

[Roy from Pa]

Very nice Kirk.

[Bryan Adolphe]

That's a cool lookin bow Kirk. Very nice !

[Kirkll]

Nice bow Kirk   I like the riser to limb buttressing, not seen that before. Cool design.

When I first started experimenting with flush limb pockets like these, I milled the pocket into the riser rather than doing matching overlays to match the limb butts. Unless the riser limb pocket was milled from G-10, I had issues with it cracking at the deepest corner of the pocket. Then I tried overlays on the riser to match the limbs with the same results over time. I had repair several of them using screws and epoxy, then doing overlays to hide the screws.

I finally just started using stainless steel screws on each end of those riser overlays when I glued them up the first time, and haven't had an issue since.
Here is a photo of a different riser.

[attachment=1]

Here is the build album on that one.

https://photos.app.goo.gl/tNyJpp8jQCtYU8ueA

Kirk

[Bryan Adolphe]

That's a beautiful bow Kirk I really like that ebony riser

[Mad Max]

I've never screwed my bow but my bow has screwed me

I bet that would pop off easy without those screws


Here is a bow I made years ago that looks like a selfbow, the stack is glued on top of the riser with fiberglass pins and the snake skins hide the lams