Not that complicated.I thought offset was the angle of rotation of the shaft from the base of the vane to the tip of the vane. Or is it as Aim4Gold describes, the angle between the vane and the centerline? To calculate the former: First find out the outside diameter of the shaft. Then draw a line parallel to the shaft from the base of a vane. Measure the perpendicular distance along the surface of the shaft from the line you just drew to the tip end of the vane. Take that distance divided by the circumference (pi times outside diameter) of the shaft to get the percent of offset. Then use a proportion to calculate degrees (percent of offset times 360 then divide by 100). So, if correct, this means that a vane length change or a shaft diameter change changes the degree of offset.
Thanks I needed that. I was putting the front of the blazer to the right of center as you suggest, but the rear the same amount to the left versus center as you suggested.Not that complicated.
Blazer vanes use a 2-DEGREE offset (not percent).
2-degrees of angle
just means that for a vane that is 2-inches long (Blazers)...
make the front of the vane 1/16th inch away from the arrow centerline
you put the back end of the vane DEAD on top of the arrow centerline.
just eyeball the centerline of the arrow,
and put the back end of the vane dead on top
adjust your fletching jig
so the front of the Blazer is about 1/16th inch to the right
of the arrow centerline.
This is called a RIGHT offset,
cuz the front of the vane is located to the RIGHT of the centerline
(looking towards the point of the arrow).
You can do it that way too.Thanks I needed that. I was putting the front of the blazer to the right of center as you suggest, but the rear the same amount to the left versus center as you suggested.
After you thoughts, I fletched 1/16 front to right / rear centered. Flew fine at/to 50 yds. So that would be 1 degree OS?! I'm going to try above 1/16th in either direction to get 2 degree.You can do it that way too.
You can have the front of the vane to the right of the centerline.
You can have the rear of the vane to the left of centerline.
If the total left to right distance is 1/16th inch,
then you have a 2-degree offset,
for a 2-inch long Blazer vane.