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Main Boards => The Bowyer's Bench => Topic started by: MB_Sweden on December 17, 2013, 05:55:00 AM

Title: TD Longbow design - Need help - New "Curves"
Post by: MB_Sweden on December 17, 2013, 05:55:00 AM
Hello guys
I need your help and feedback
I have built a couple of Recurves and One piece longbows!
Trying to build/design a TD Longbow 62" using a 16" Riser with 12° limbpad angle!
I have 2 alternative so far:

Am I on the right track ?
Please let me know which design you like best?

  (http://i1015.photobucket.com/albums/af277/swedisciple/kurva2_zps7f1503f7.jpg) (http://s1015.photobucket.com/user/swedisciple/media/kurva2_zps7f1503f7.jpg.html)
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: Buemaker on December 17, 2013, 10:34:00 AM
If the dots on the lines are the bow tips or string notches I would go with nr. 1. Depends of course on wedge lenght , taper rate and so, but on average nr. 1 should give a faster, but still sweet shooting bow, with a fatter draw force curve. Bue--.
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: MoeM on December 17, 2013, 11:15:00 AM
Yeah I`d take 1 too!
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: beachbowhunter on December 17, 2013, 11:41:00 AM
I would go with No 2 but drop the angle to 10*
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: MB_Sweden on December 17, 2013, 12:40:00 PM
Thanks guys!
Yepp, Dots on the lines is string grove for a 64" NTN.
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: MB_Sweden on December 17, 2013, 01:34:00 PM
Should I change the curve on some of the limbs?
I try to understand what Im looking for in the limb!

Any recomendation for taper and wedge lenght for limbs?
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: MoeM on December 17, 2013, 03:34:00 PM
Reminds me a bit of my 62-64" (1-pc)  LB, 10° limbpadangel 17"... so I`d use either short wedges and a .004 taper or half the taper and very long wedges like p-lams.
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: Swissbow on December 17, 2013, 05:48:00 PM
QuoteOriginally posted by swedisciple:
Should I change the curve on some of the limbs?
I try to understand what Im looking for in the limb!

Any recomendation for taper and wedge lenght for limbs?
I would go with nr. 1. and leave it the way it is. I'm sure it will build a very fine bow. If I wanted to build a short d/r bow ( 60" or less ) I would go with nr. 2, but i would move the part where the limb starts to bend upwards closer to the riser.
__________
Andy
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: Crooked Stic on December 17, 2013, 07:54:00 PM
No. 1 looks good --except I would take the deepest part of the deflex to mid limb before going up with your reflex.
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: Pheonixarcher on December 18, 2013, 12:20:00 AM
It really depends on what profile you are looking for at brace, and the draw length you are going for. Either design will work great with the right lams. What sort of specs are you aiming for?
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: MB_Sweden on December 18, 2013, 01:23:00 AM
Thanks
Aimong for
62-64" NTN
40-45# @ 28"

Really like when limbs are straight or a bit reflexed in top when bow is braced!
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: BigJim on December 18, 2013, 07:13:00 AM
Number too will give you very little early draw weight...without that you will have a lethargic bow. Number one is slightly better, but depending on how much taper you have in width and thickness, it may also do the same.

BigJim
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: BigJim on December 18, 2013, 07:14:00 AM
Number too will give you very little early draw weight...without that you will have a larthargic bow. Number one is slightly better, but depending on how much taper you have in width and thickness, it may also do the same.

BigJim
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: MB_Sweden on December 18, 2013, 07:21:00 AM
Thanks for all feedback!
Some new curves, have I understand it ?  :)
 (http://i1015.photobucket.com/albums/af277/swedisciple/kurva4_zps71d76526.jpg) (http://s1015.photobucket.com/user/swedisciple/media/kurva4_zps71d76526.jpg.html)
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: kennym on December 18, 2013, 08:59:00 AM
Not a bowyer, but I like the old #2 because it doesn't look as hingy at end of wedge.

But move the nocks at least an inch to target side of riser. Like Jim said, it will help performance and also quiet a bow,it did mine anyway when I went from 14* pads to 12* with same limb.
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: MB_Sweden on December 19, 2013, 05:10:00 AM
Im starting to loosing it  :)
Im trying to get a mix from all feedback, to mutch for my little brain!
Maybe I should stay with recurves?
Or does anybody has a nice pattern to sale?
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: bowhntineverythingnh03743 on December 19, 2013, 05:20:00 AM
Kenny M has some proven once piece longbows and I remember him saying he has a new pattern that he would like some feedback on... Maybe hit him up with a message or something.
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: MB_Sweden on December 29, 2013, 03:31:00 PM
This is still giving me headache  :)

Anybody here that can sell me a pattern for a 62" or 64"  TD longbow?
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: M.Kerry Bird on December 30, 2013, 11:16:00 AM
The bingams projects t/d longbow is a proven performer being built and sold by dozens of bowyers. The blueprints only cost about  $10. Can be built in lengths of 58-68"
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: beachbowhunter on December 30, 2013, 11:32:00 AM
I can email you a file in Adobe Illustrator with my profile if you like...
Title: Re: TD Longbow design - Need help - New "Curves"
Post by: MB_Sweden on December 30, 2013, 11:46:00 AM
@beachbowhunter
That would be great!