One piece recurve.

[Crooked Stic]

New form. Did one a while back and had terrible hand shock. This one will have more preload. I am thinking 19 or 20 riser for 60 in. bow. what you all think.

[jess stuart]

I have a 60" one piece I used s 20" riser it makes a good shooting bow.  Haven't built one in years takedowns seem more popular.  I need to build some.

[Crooked Stic]

How much forward taper did you use Jess?

[jess stuart]

I used .002 but back then everyone wanted 60 plus pounds.  If building today's weights would go .001 or possibly. 0015.

[Crooked Stic]

Yeah I had an OMC design that called for .004 FT. but most were above 50 pounds.

[jess stuart]

I have been using less and less forward taper in my recurve limbs.  Haven't noticed any negatives so far.  The very first book I had with recurve instructions used all parallels.

[Crooked Stic]

Seems to me you could get by parallel and work on the width taper. I got a Black Widow that has tapers (don't know how much) looks like .002  by eye ball and is tapered from fade to tip and maybe 1/2 at the grooves. Does have carbon twill on front and another thin black lam maybe stablecore only 38@28. But my guess they got the CNC to help

[Mad Max]

I have a 60" with a 20" riser---lam starts with a .005 then changes to .002

[Kirkll]

I've never regretted going with .001 FT on my static tip RC limbs, and drop to a par at lower draw weights. I think with 50# plus draw weights an .002 can be used without too much lateral or vertical stability issues just using glass, but anything lower i want more meat at the base of that curl to hold it stable... Nothing worse than fighting limb tracking issues... I've had some light weight bows that you had to be careful which way the string loops were flipped on a flemish loop to keep it tracking straight...

I like your limb shape Mike. I think it will do well once you find the sweet spot on the hook for your tip notchesand the right string length. What exact length you end up with, and the amount of preload is a crap shoot on a prototype one piece.

I always prefered to do my new limb shape prototyping on TD limbs so i can adjust the preload a bit with limb pad angle using an adjustable riser. I also  use different string lengths to get the things dialed in. That, and find the best tip notch location on the hook....   After i get things bending right and max performance and stability, I adjust limb butt length to hit AMO bow length, then i measure from the string back to the deepest part of the grip location at  7.25" ......

then.....  i reverse engineer to a one piece....    This gives you room for adjustments to get the max out of your limb geometry. If you aren't happy with it, you have the option of shifting the stops on your form, use different taper rates and wedges, and go again. Or worst case, build another short form with a different shape.

I wish you luck on it.... could be a winner....  Kirk

[Crooked Stic]

So Max sort of a built in power lam?
I have two sleds like that and one has a built in tip wedge and the power lam---Kenny called it superman. But I think they are stepper than .005. 010 maybe.
Yes sir Kirk I hate tracking issues.

[Mad Max]

Yes

[Kirkll]

I use a double ended power lam milled at 30” length for a 20” riser tip to tip on the fades. This gives you the same effect as the multi taper laminations and it’s easy to lay up. This power lam just goes on the back of the riser…

Kirk

[Crooked Stic]

A bit of an update.I use a drill jig for form strap holes that way no fighting drill press. Bottom half ready for spacers

[jess stuart]

Back down in the form that is the same way I built my form.  Works great.  Looking forward to seeing a finished bow.

[Buemaker]

Would be interesting to see the taper rate on that Widow. You could measure the thickness on a limb 10-12 inches apart and se how much it tapers.

[Crooked Stic]

Yes Jess easier for me to bend around  than into a curve.
Bue I may check the Widow today.

[Crooked Stic]

The Widow is .004 FT 62 in. 38@28 but like I said carbon front and some other black thin lam in it also

[Kirkll]

Where are you measuring the FT at on the limb Mike?  .004 sounds extreme to me….

[Crooked Stic]

Measured it about mid limb. in 6 inches was 024 difference. I used to buld a OMC design that had .004. All of them was above 50. Like I said the Widow is carbon back with another thin black lam in the mix 
Anyhow I got some done on the form and a riser profile jig made.I got a bit carried away with the bondo and had to break out the CNC sanding block 

[Kirkll]

Are you going to edge band that form? or leave the plywood end grain as is?

What are you going to use to seal that form Mike?  I've been using shellac on mine because its cheap, and it holds up well over the years with a couple heavy coats.