Ed ZacharyOctober 10, 2010 at 2:44 pmPost count: 58
From Dr. Ed – “Note that the distance the turbulator is placed in front of the fletching is important. Optimum appears to be 1/4”. That’s based on O.L. Adcock’s extensive turbulator testing with flight arrows. “
Okay, most hunting shots are say 25 yards(?) and under, I can see where the turbulator ring may have an effect with flight arrows going 250-plus yards….does the turbulator ring really have any effect at hunting distances? I mean what would one see, shooting one arrow with turbulator, one arrow without, at 20, 25 yards? Thanks
Ed AshbyMemberOctober 11, 2010 at 2:55 pmPost count: 816
Ed, the turbulator merely increases the pressure the air flow exerts on the fletching. What the turbulator does for a well tuned hunting arrow is allow the use of significantly less fletching. This reduces weight on the shaft’s rear, allowing higher FOC. This is s really important feature when trying to reach the upper levels of FOC, because the rear leaver arm gets longer as FOC gets higher. Having a longer leaver rear arm means that a one grain reduction in weight at the shaft’s rear has more effect on FOC than adding several grain to the arrow’s point.
However, the turbulator-permitted smaller fletching has many other benefits on a hunting arrow. Here are a few:
(1) There is less arrow drag in flight, permitting more of the arrow’s energy to be applied to arrow flight and penetration. (Arrow shoots flatter, retains more arrow energy downrange and penetrates better.)
(2) It allows use of very low profile fletching, which is vastly stiffer and far less affected by moisture. (When we were testing the A&A fletching, even when soaked for 30 minutes in a bucket of water, and shot without even shaking the excess water off, Wesley could detect no difference in impact – with broadheads – even at ranges beyond 40 yards; and he’s easily capable of sub-2″ groups at 40 distance with his compound.)
(3) The smaller fletching (I use the A&A pattern, straight fletched) has a lower noise level in flight than any other fletching I’ve found.
(4) The smaller fletching is less affected in cross and quatering wind conditions.
Hope that helps,
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