Hand Shock, What is it.

[nomis]

What makes a bow give hand shock?

Discuss...

(I have my ideas, but i think i want input to widen my horizons)

[worthipa]

Originally Posted by nomis

What makes a bow give hand shock?

Lack of dampening?

[robtattoo]

Oooooh. A few things can contribute. Heavy/high mass limb tips, an overly lightweight arrow, incorrect string material, improper grip, bad loose, bad bow design, narrow deep-cored limbs, low brace height, high brace height, etc....

I'm sure there's more, but that's all I've got for now!

[nomis]

Robtatoo. I wasnt expecting all the points to comeout in the second thread :-)

But... What about black Widdow. Not too much hand shock from one of them..

Heavy limb though...

String weight would cause it.... yes.

Though brace height... how does that work?

I see it that hand shock, Not vibration, is the weight ratio between the grip and the limb tip.... Vibration is down to badly balanced limbs coming to a stop at different times. due to bad loose, hand grip, and bow design?

The black widdow works by having a heavy handle... that makes the limb tips feel light to the bow?

The weight of the sting and arrow will absorb the speed of the limb tips causing less momentum when the bow goes tight?

[Macbow]

Rob said it all.
Handshock is also relative - I own high end bows that have been described as having zero handshock but I'd say "a mild but noticeable thump".
After shooting my metal-riser Hoyt recurve I recently tried a popular brand ELB and was astounded by the jarring I received from bow hand right through to my fillings. Yet most ELB shooters would probably have described it as sweet.
What is an acceptable amount of handshock for one archer is not acceptable for another.

[robtattoo]

Originally Posted by nomis

Robtatoo. I wasnt expecting all the points to comeout in the second thread :-)

But... What about black Widdow. Not too much hand shock from one of them..

Heavy limb though...

String weight would cause it.... yes.

Though brace height... how does that work?

I see it that hand shock, Not vibration, is the weight ratio between the grip and the limb tip.... Vibration is down to badly balanced limbs coming to a stop at different times. due to bad loose, hand grip, and bow design?

The black widdow works by having a heavy handle... that makes the limb tips feel light to the bow?

The weight of the sting and arrow will absorb the speed of the limb tips causing less momentum when the bow goes tight?

Widow limbs are generally heavy throughout their entire length, proportionally the tip is still light compated to the rest of the working limb. The most motile part of the limb, ie; the part which moves the furtest the fastest is still very lightweight. They're a nice slim tip. If the very tip itself were heavy with large overlays, wide design etc... there would be noticeable shock there.
If you have too high or low a brace height, you are forcing/allowing the limbs to stop well before/after their designed & carefully tillered rest point.

Hope this is clearer

[Jerry Tee]

Hand shock is caused by reaction to the forwards moving mass of the of the working parts of a bow and is proportional to their mass and acceleration, mitigated by the mass of the static parts of the bow.
Modern design has cut this down a lot in compound by reducing the forwards movementand substituting outwards movment. These forces cancel each other out as they are opposite.

[robtattoo]

Tha's what I said..........Kinda

[Jerry Tee]

I was just translating for you.