limb flap and tiller

[napolienne]

1) Check the tiller again now your limbs aren't so hot. Is it still 0mm?

2) If it is and your limb bolts haven't moved, check the dovetail fittings in the limbs. Does the sprung bit travel smoothly if you push it, and does it travel the same amount on both limbs? Are there any signs of stress on the limbs? Do they both have the same profile if you hold them next to each other?

3) If the limbs and limb fittings seem fine, adjust your bolts so that the tiller is back to what it should be. Check your tiller every time you set up, halfway through, and at the end of each of your next few shooting sessions. Write down the measurements. Is the tiller changing?

4) If it is changing, put your limbs in your riser upside down. Is the difference between the two the same but inverted? EG where the bottom limb was previously Xmm less than the bottom, is the top limb in the bottom pocket now Xmm more?

5) If no - the difference is the same but NOT inverted - the most likely cause of the change is your bolts.
If yes - check the limbs in someone elses riser - is the tiller difference significantly more than they would expect?

If yes to that last one, you have precisely what has happened to me with my last two sets of limbs - they've had it. To get around it you can adjust your bolts so that you have correct tiller again, but if the limbs really are kiffed then you'll spend more time trying to get the correct tiller than you will shooting.

If the tiller doesn't change once you've set it back to where it should be (step 3) then don't worry - whatever it was that moved or changed isn't doing it anymore.

[clickerati]

Nat, I'll give those points a go, but just for clarification, this 0 tiller started before the hot weather. Also, Robert posted that he only saw the top limb and not both limbs.

[clickerati]

Originally Posted by sp220

If the top limb is flapping - so is the bottom one

It has to be that way due to the massive tension on the string.

what i meant was, they may be flapping at the same time or out of sync. yet to be determined.

[Devon_Archer]

when setting tiller don't measure the tiller until you have shot at least 10 arrows

my limbs don't settle to their natural position until at least 10 arrows are shot

and if you adjust, measure again only after 10 arrows

it is the only true way to get a true measurement

[not dead yet]

to find out if the top limb is U/S hold the bow vertical grab the string in the middle and push up and pull down . both limbs should move in tandem. if the top limb moves more then the top limb is u/S

oh and sp220 clicki has half the poundage you have is she starts adding weight the it wont be doin anything

[BeardedBowman]

"Limb, Flutter and Tiller".... sounds like a dodgy name for an archery Solicitors office to me....

[clickerati]

Originally Posted by BeardedBowman

"Limb, Flutter and Tiller".... sounds like a dodgy name for an archery Solicitors office to me....

you can have a look at my flappy limbs at the FITA on Sunday and see what you think

[Paul120]

Hi,
The tiller change could be down to the limbs settling down in the heat or just with use. I see that the limbs you use are winact and I beleive that they have a wood core and not syntactic, this would explain the slight movement in tiller. I can't see this as anything to worry about. Tiller is only a static measurement and is a very crude way of acheiving so called limb balance, and as far I know nobody has found a good way of finding correct tiller settings for an individaul pair of limbs. I was once told that as you pull the bow back the longrod should stay level and not rise. however when we tried it the tiller measurements were silly and the bows we tried were awful to shoot.

As for the limb flap. Stabilisation is the way to go as some should be expected. Long rods with doinkers help and If shooting less that 45lb then you should use a top rod as well to reduce the flap/wobble. Over 45 and flap' is much reduced as the limbs have more inbuilt resistance to it and you can get away without a top rod.

[AlanT]

Originally Posted by Paul120

I beleive that they have a wood core and not syntactic, this would explain the slight movement in tiller.

I'm curious as to why this should be the case. Could you provide more details?

Alan

[BorderBows]

Originally Posted by AlanT

I'm curious as to why this should be the case. Could you provide more details?

Alan

Gtek once said on this forum, and its stuck in my head, that he has observed a drop of (if i remember rightly) 1.2-1.3lbs in bow weight over the first 3000 shots if the bow is about 35lbs at 28" (we locked horns at tad over it a little while back)
Here goes for some speculation... so dont shoot me for it.
If the top of the tree is less dense, than the bottom, and no two trees are the same density, then it is possible that you have two limbs with different tree's in them, and with these mass production techneques there ends up a difference that can show in the balance of the limbs as the limbs loose a different range of averages over 3000 shots.. Pure speculation as we have not observed this drop in bow weight in any of our bows, as discussed in the other thread. But if this speculation is nothing but rubbish, having not seen or have any knowledge of this product, then you have something more funny going on!
If this is the case then it could be normal "settling in", more than likely its the bolts moving, BH chnages, preload changes, limbs failing, are all things to consider in the "funny things"