Why not just angle the vanes more? Because added angle also increases drag, which slows the arrow and increases arrow noise. Amazingly, the curved vanes reduce drag, as evidenced by flatter trajectory. In fact, tests show that arrows drop six inches less at yards with curved or true helical vanes compared with typical angled vanes. And, noise is also reduced. Whether your arrows were fletched at the factory or with another fletching tool, the vanes are attached at a simple angle to create spin, but they are not curved.
The result is measurably tighter groups and better broadhead flight especially from an out-of-tune bow. Not only do true helical curved vanes virtually double the spin rate, they do so while dramatically reducing turbulence, which results in less drag! This, in turn, means flatter trajectory 6 inch less drop at yards and quieter arrow flight less chance of a buck jumping your string! As rocket scientists, they understood that the faster a model rocket stabilized at takeoff, the higher it could go.
In real life, if a rocket is unstable at takeoff, it may never stabilize, given the extreme and constant thrust applied. So, in their world, stabilization is absolutely crucial. If you fletch them helical, they will out-perform offset or straight-fletched arrows every time. Mowery knows that production arrows struggle because of his discussions with mass-producing arrow builders who have told him the helical process is too difficult.
How to Get the Good Stuff Mowery said the best options for those looking for true helical fletching is to purchase arrows from an archery pro shop that fletches its arrows by hand be sure to ask for helical , or to do it yourself. Even if you have three thumbs, installation is a snap. The Stretch Fletch incorporates 2-inch Bohning Blazer vanes that feature, what else — a 3-degree helical orientation.
The answer back then was long 5- to 5-plus-inch helical feather fletching—which, by the way, is still the best answer for traditional setups today.
Parker Brown pulled out all the tricks to bring this incredible buck into bow range. Fletching an arrow with straight vanes provides little spin, but they should fly faster because there is less air resistance and speed is not lost from the spinning motion of the arrow. Pros: Creates the fastest flying arrow, does not create additional spin so it is better for closer range shots. Cons: Greatest chance for arrow to be affected by wind.
Very similar to bullet rotation caused by the rifling of a gun barrel. Pros: Increased arrow stability especially when shooting broadheads , better for longer range shots. Cons: Slight air resistance in flight and some loss of arrow speed. Pros: Maximum arrow stability best choice for shooting broadheads , highest accuracy at longer distances due to the arrow spin, least affected by wind. Once again very similar to bullet rotation caused by the rifling of a gun barrel.
Vane size length and surface area also plays a large role in the amount of stabilization your arrow will receive. Small low profile vanes will do less to stabilize the arrow than large high profile vanes. The more or less surface area a vane has, the more or less contact it will have with the air. Higher surface area vanes are more effective at correcting the arrow in flight.
This plays a large role if you release an arrow with bad form because the fletching will help correct this to a slight degree shortly after the arrow leaves the bow.
Bow form is still critical, but this gives the archer a small amount of leeway. My friend Tim Ostlie prefers to use 2" high profile vanes with a slight offset to steer his large fixed blade broadheads.
There are trade-offs you need to think about when selecting a vane.
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