BOW DESIGN

To design a better bow first we have to realize that:

A: accuracy is in the riser

B: performance is in the limbs

 

Knowing this, let us work on accuracy first, since without it everything else is useless.

A riser should have a grip that just slips into your hand naturally. It should not feel bulky or awkward. The shelf should be close to the top of your hand if you shoot instinctively. The sight window should be cut to, or slightly past center for good arrow clearance.

Risers should be straight (in-line), slightly deflexed, or slightly reflexed for natural pointing and stability. The more reflexed the riser, the more powerstroke you gain, but you loose stability. On the other hand, the more deflexed the riser the more stability you gain. However, you also lose powerstroke and the bow will not balance properly. A straight or in-line riser gives you the best of both worlds. It is a very stable and well-balanced design that also affords a good powerstroke. This means stability without loss of performance.

The riser should also have most/more of its weight below the grip so that the bow will balance in the hand properly and be more stable. This is important so as to help maintain a good, steady follow through.

Remember that a properly designed riser does not need fingergrooves or thumb-rests to help keep it from torquing.

The Ballistik was designed with all of these things in mind.

 

Now that we have the perfect riser, let us see how we go about designing the perfect limbs. First off we need to acknowledge a few rules of good bow design. These are:

A: Shorter limbs recover faster than longer limbs and have less hand shock than their longer counterparts.

B: Bows that have more string tension at braceheight tend to store more energy than bows with less tension.

C: Bows that stack do not draw smoothly and do not store energy efficiently.

D: Handshock, limb vibration, and noise are wasted energy.

With this knowledge, we know that:

 

if you-- store more energy at full draw and you—transfer more energy to the arrow you get—faster, quieter bows with less handshock

To do this we need to:

- Load the limbs early in the draw so they store more energy.

-Reduce the string angle at full draw so that the bow stacks less, draws more smoothly, and stores more energy.

-Shorten the limb and use the correct tapers (both width and thickness) so the limb weighs less and recovers faster.

This is why, since their inception, all of Sovereign Archery’s recurves utilize a static limb design. Only a static limb recurve lets you take advantage of all the benefits of storing lots of energy early in the draw, while maintaining a low string angle at full draw. No other limbs on the market today can offer you the energy storage and silky smooth draw that the Ballistik’s retro-flexed limbs can.

So what’s left? Here are some other factors that also affect accuracy, which we must take into consideration.

-How does bow length affect stability and performance?

-How does hand shock affect accuracy?

Longer bows will inherently be more stable than shorter ones. (That is why tightrope walkers that use longer poles keep better balance than those who use shorter poles) The longer overall length helps to keep the riser (and the hand that’s holding it) more stable.

How does this affect performance? Generally, longer bows have longer limbs. While they tend to draw smoothly (because they don’t stack) they also tend to shoot sluggish in addition to having excessive hand shock and limb vibration. This is due, in fact, to the heavier mass of the longer limbs. So what? Remember, not only does handshock and limb vibration waste energy, it also makes it more difficult to keep your bow arm steady after the shot. This means it’s harder to maintain a good follow through, which hurts accuracy.

What can we do about it? We can lengthen the risers, not the limbs. This (provided we also maintain a low string angle at full draw) will insure a stable bow without excessive handshock, limb vibration, or stacking.

Take a perfectly designed riser and mate it with the perfect limb design and you have the perfect bow. The type of bow we build at Sovereign Archery.

 

 




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