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not quite right

Started by lohed, April 02, 2010, 02:27:00 AM

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lohed

so i built my first lam longbow and used 2 parallel lams 1 taper and 2 glass - problem is (i think) that i tapered the limbs a little to much - brace height is 7 3/4" and i havent pulled it on a scale but the poundage seems pretty light - ive been shooting an old recurve that is 50# at 28" but my draw is 31"- oh and the recurve is 58" and the longbow i made is 64" - this is the first longbow ive ever shot so im wondering if they're easier to pull being longer first of all and if i should have added another lamination - also what is a good recipe for a 64" 50# longbow and a good starting point for cutting the tapers to start with - sorry about the run on - help would be greatly appreciated for the next one

Apex Predator

We need to see some unbraced, braced, and full draw photos to tell you the most.

I use four .001 tapered lams in all my bows, so I doubt you used too much taper.  

Yes, many times longer bows will seem to be lighter.  You need to have acess to a scale.  You can use any bathroom scale for this.

What kind of longbow do you want a recipe for?  They vary bunches in profile, and willl require different stack dimensions.  How long is your riser?  How thin are your fades?  Many questions can be answered with some good photos.
I didn't claw my way to the top of the food chain to eat vegetables!

lohed

apex thanks for the reply- i will get photos of these on here later- i am going to check draw weight today- also i am not clear on (kind) of longbow and profile can you be more specific?- riser is 18" and i will take closeup shots of the fades- thanks

Apex Predator

Look at the three bows in my avatar.  The photo is not to scale height wise, but you can see three different limb profiles, straight with mild string follow, mild deflex/reflex, and pronounced deflex/reflex.  The more curves usually require less limb thickness.
I didn't claw my way to the top of the food chain to eat vegetables!

lohed


lohed


walkabout

thats a great lookin bow for a first timer, congrats on the successful build.
Richard

Apex Predator

I agree that is a fine looking bow!  You did a fantastic job!  The only thing worth mentioning is the tiller.  Your bottom limb is bending quite a bit more in the photo.  Sometimes the photo is not perfectly square and can accenuate this perception though.  What is your tiller measurement for each limb (from end of fade on the belly to the string)?
I didn't claw my way to the top of the food chain to eat vegetables!

lohed

are you talking square in a static position from string to riser ?

metsastaja

yes that is what Apex means
Les Heilakka
TGMM Family of the Bow  
Some times the uneventful nights are just as good if not better than the eventful ones

Apex Predator

I look at that same photo now, and it doesn't appear off by much.  Those photos will mess with your mind sometimes!

Yes square.
I didn't claw my way to the top of the food chain to eat vegetables!

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