Offset versus Helical

[Brad32]

Hi all been stalking this forum for a couple of months now . just a simple question,hope someone can explain the merits of both for steering broadheads.
Cheers Brad

[Hunt it]

The terms are a bit misleading as helical is also offset but to a much greater degree. Both impart a spin on the shaft which is used to stabilize the shaft and broadhead. General theory is that the bigger the broadhead the greater the helical required to stabalize it. Close range there is not much difference between the two. Helical tends to show better results at longer distances. What target archers figured out long ago was that the greater the helical the greater the drag on the arrow thus slowing it down. Many target archers believe offset is the happy medium, but keep in mind - target archers don't use broadheads. In recent years the fletchings have gotten smaller 2" rather than 4-5" the reason for this is the shorter fletchings creates less drag and has been found to stabilize arrows just fine.

[Boo]

Helical gives you more rotation of your arrow than an offset. Arrows are not perfectly symmetric. So an arrow that is not perfectly straight or a broadhead that is not in the same axis of the arrow will veer off. Rotation of the arrow will compensate and keep it on track.
If you compare the two, a helical will emulate a foil more than a straight, offset vane, which is the main reason for having more rotational effect.

[Carnivorous]

One thing I learned is the 4" vanes I just bought can only be fletch with an offset due to the drag on the rail if I fletch them with helical. My 2" blazers have the right helical fletch using the bolt fletcher and they are pinpoint accurate...

[Boo]

by Boo » Wed Mar 23, 2016 5:43 am

Helical gives you more rotation of your arrow than a helical.


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