Main Discussion Area > English Warbow
Tillering warbow with reflex
toomanyknots:
--- Quote from: WillS on May 27, 2013, 03:04:25 am ---Thanks for that reply dude, very helpful!
Really interesting regarding your last point - I was working under the assumption that the left limb (reflexed) would be the lower limb, as currently it's a lot stronger. My offset handle is arranged in this way, as in TBB it's said that you pick the limb naturally facing the archer to be the upper limb. But like you said, once everything's finished and the tiller is even, at that point the deflexed limb should be stronger. Which throws everything upside down!
This bow making thing is crazy.
--- End quote ---
I know John Strunk said that I believe in one chapter, but it (respectively of course) just ain't what I have found to be true. I have always wondered about this, if he made a typo or something? Because the reflexed limb will always have to be made to be weaker to meet the deflexed limb, and the deflexed limb will always have to be left stronger in order to move less than the reflexed limb, ya know what I mean? Maybe he tillers his bows overly asymmetrical, where the bottom limb is very very stiff or something, I don't know. I tiller my longbows symmetrically for the most part, with just a slightly stiffer bottom limb, not enough to make it worth measuring a difference in brace height, just a smudge stiffer. Maybe between a 16th and a 8th an inch difference at the most I think. But when tillering a stave like this, no matter if the bottom limb "appears" to the eye to be alot weaker (when using the stronger deflexed limb for the bottom), it can still be a good deal stronger.
WillS:
This pic is more for my benefit than to ask you guys for help again, but obviously if you spot anything glaringly obvious feel free to mention it!
This is pulling 80# at about 18" on the long string. The deflexed area looks much better now, and I think my focus needs to be the inner third to middle of the left limb to even things up. I want to get this to brace as soon as possible, to avoid staying on the long string too long as you all mentioned. I don't think I'm far off.
toomanyknots:
The left limbs bend is looking good. The right limb looks like it is working mostly in the middle of the limb, and not enough towards the tip and right off the handle/center. I would take a bit off the tip of the right limb, and a bit off the area right off the handle/center (if you know what I mean, off the "fade" I guess, even though these bows don't have fades, like where the fade would be) of the bow on the right limb, trying to get it working evenly and not too much in the middle. Or anywhere else for that matter, :). Also, I would remove material from the entire left limb at the same time I do that, to weaken it a smudge at the same time I am weakening the right limb. Course, it is kinda hard to tell what exactly to do from here, just cause it isn't bending that much, that is just probably what I would do. It is looking good though!, 8). Can you shorten your long string any? Is it stretchy? It is better to have as short a longstring as possible, if you can. I know nylon cord will a lot of the time stretch no matter what though.
WillS:
I definitely agree about the whole left limb needing to work a bit more, so I'll take the whole limb down a fraction. I'm wary about playing with the middle too much yet, as it's not even brace height yet, and I don't want the middle working too early if that makes sense?
The tillering string is just an extra long bowstring, from about a million strands of B50. I'll shorten it up once I've got the left limb a bit weaker and see where I am!
WillS:
Couple of weird things are happening. I shortened the long string to the point where it was very tight against the belly and suddenly the bow started curving laterally. It's now got a permanent C-curve throughout it's length and the string has stopped tracking straight. It's also suddenly taken a lot of set in the reflexed limb tip (the left limb in the pics)
And it went "POP" on the tiller. All in all, a successful bit of work. :o
Grrr.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version