String hits hand

[RGrahamSmith]

Hi

Anyone explain this? It's wierd with a capital Wee.

Having been using a fastflight string for a while on my KAP recurve, I thought it was looking a little worn, and decided to change it. I took out a dacron string (same length - all perfectly correct for the bow) and strung the bow, fitted nock points and went out to get the sight set. On the first shot, the arrow went really wild, the string made a strange floppy twang (sorry to get technical) and hit my hand! Not my arm or wrist, but the heel of my bow hand. What the....? Tried again. Same thing happened. After four painful shots, barely hitting the boss, I gave up and, without changing the bow in any other way, restrung the old fastflight string. All perfect from then. No problems at all! Normally even the arm bracer is superfluous as I never get the string grazing my arm, but this was really strange. I checked everything I could think of, but couldn't find anything to account for this. It's a mystery!

Graham

[Tropicalshot]

Originally Posted by RGrahamSmith

Hi

Anyone explain this? It's wierd with a capital Wee.

Having been using a fastflight string for a while on my KAP recurve, I thought it was looking a little worn, and decided to change it. I took out a dacron string (same length - all perfectly correct for the bow) and strung the bow, fitted nock points and went out to get the sight set. On the first shot, the arrow went really wild, the string made a strange floppy twang (sorry to get technical) and hit my hand! Not my arm or wrist, but the heel of my bow hand. What the....? Tried again. Same thing happened. After four painful shots, barely hitting the boss, I gave up and, without changing the bow in any other way, restrung the old fastflight string. All perfect from then. No problems at all! Normally even the arm bracer is superfluous as I never get the string grazing my arm, but this was really strange. I checked everything I could think of, but couldn't find anything to account for this. It's a mystery!

Graham

was the brace height the same ???

sounds like a too low brace height and the string is traveling to far forward after the release




MAXIMUM BRACE HEIGHT RANGE RECURVE BOW
LENGTH
64": 7 3/4" to 9" (19.7 cm to 22.9 cm)
66": 8" to 9 1/4 " (20.3 cm to 23.5 cm)
68": 8 1/4" to 9 1/2 " (21.0 cm to 24.1 cm)
70": 8 1/2 " to 9 3/4 " (21.6 cm to 24.8 cm)


My brace height 9

[King Custard]

....WAY too far forward.

unfathomable- unless as Tropical said brace heights were not the same.

[johnske]

Dacron stretches a lot more than modern synthetic materials like fastflight.

You say it's the same length as the fastflight string, that means it will give a lower brace height when strung, this (perhaps) may not be particularly noticeable but the greater stretch also allows it to go further forward after the arrow leaves the string.

I suspect your brace height is too low also, measured brace height is much more important than any 'recommended string-length' - and i suspect that this 'recommended string-length' given by the manufacturer has an inherent assumption that you will be using modern string materials in any case. I mean, you'd hardly think they'd give a 'recommended string-length' for hemp, silk, or dacron strings when most ppl these days use fastflight, dynaflight etc.

[bkupris]

Dacron does not stretch THAT much. The string must be WAY too long IMHO.

[geoffretired]

Graham, just a thought. String your bow with the fastflight and try to press the srting towards the bow grip(opposite of pulling the bow normally.) Put on the dacron and do the same thing. See if there is a tendency for the dacron to move more readily towards the grip; and closer.

[RGrahamSmith]

Wow. Talk about rapid response!
When I said the string was "the same length", I meant that it was marked as "68 inches" (as is correct for the bow) just as the fast-flight string was. I assumed the brace height would be the same, but I didn't check that. Will do. Also I'll check all the other things suggested. It occurs to me that possibly the manufacturer made an error and this wasn't what it purported to be, so I'll look carefully at it again.
Incidentally, when I change from one fast-flight string to a new one of the same make, there never seems to be any difference. Perhaps I've simply assumed that strings marked as being the correct length for my bow are always the same, and that's a mistake.

To be continued, I expect!

Graham

[spavo]

Fast flight to Dacron is a bit of a step backwards, Dacron is used on "mainly" on beginners bows and old bows It has a relatively high stretch and causes less shock to the bow, important to old bows

Comparing Dacron to Fast flight the Dacron is a heavier strand and therefore less strands required, Dacron with its strectch will also travel further forwards once you have released the string i.e. will go past the original point in which it sits when strung, fast flight and every other string material will do this but to a less extent than Dacron, therefore if your bracing height is incorrect then the forward travel will be more pronounced.

[grimsby archer]

Originally Posted by RGrahamSmith

I meant that it was marked as "68 inches" (as is correct for the bow) just as the fast-flight string was.

Clarification required please.

Was the string marked "for a 68 inch bow" or was it marked "string length 68 inches"?

A 68" string wont fit a 68" bow. Usually the string length is approx 3" shorter than the bow length, so a 68" bow would need a 65" string.

[EVC]

I would also verify wether the Prostyle bow can stand a string other than Dacron. You'd better ask KAP archery for support on it.



Elder.