HuntingNet.com Forums - quick spin qestion

I cut this from NAP's website...all you need to know about quick spins....I have some but haven't fletched yet.

The QuikSpin vane is currently offered in 4 inch, 2.25 inch and 1.5 inch
models. The 4-inch is 17/32" tall. Both 2.25 and 1.5 inch are 3/8" tall.

The QuikSpin vane is currently offered the following colors: White, Black,
Fluorescent Yellow, Fluorescent Orange, Fluorescent Green, Blue, Red, Purple
and Olive Drab. Olive drab will not be available in the 2.25 and 1.5
models.

The 4" QuikSpin vane weighs 12.8 grains each so the total weight as compared
to a standard plastifletch is about 13 or 14 grains heavier per arrow. The
2.25-inch model is 4.7 grains each. The 1.5-inch model is 3.1 grains each.

The QuikSpin vane incorporates Micro-Grooves on one side and on the opposing
side is the profile of the kicker and a smooth surface. The Kicker is a
small (0.062 thickness profile) strategically positioned airfoil which
coupled with the Micro-grooved opposing surface creates a difference in air
pressure side to side which creates spin. Additionally, the Micro-Grooves
provide rigidity, which prevents the vane from flopping wildly in the air
stream. The rigidity helps to stabilize (prevent flapping) the vanes almost
immediately out of the bow. This effect allows the kicker at the back end to
function more effectively as spin increases.

The kicker is molded secondarily after the base. The profile is such that
the vane can be used in any standard fletching jig or automatic fletching
machine.

The durability is similar to other such plastic products.

The vane is heavier than other 4-inch vanes by about 4 grains. So an arrow
fletched with QS will weigh about 12 grains more than an arrow fletched with
plastifletch. This reduces the speed by 3 to 4 FPS out of the bow.
Speed lost in flight is not as severe as people assume it will be but it is
mainly a function of offset.

A straight QS at 40 yards versus a standard straight vane is overall (added
weight plus rotation) about 5 or 6 FPS slower.

A comparison of 4 degree offset QS and standard vanes results in about 7 or
8 FPS at 40 yds.

Helical comparisons result in 9 or 10 FPS at 40 yds.
QuikSpins are faster than feathers at 40 by about 15 FPS because the vanes
have far less drag than feathers.

Down range precision is increased as a function of being able to stabilize
the arrow almost immediately out of the bow and maintaining aerodynamic
stability due to spin. Basically it is the same idea a gun manufacture uses
when making a highly rifled barrel for target shooting.

The ability to stabilize a standard broadhead is also increased.

Noise - the QuikSpin is quieter than a standard plastifletch or feather.

Perfectly straight on the shaft, the QuikSpin spins about equal to or
slightly greater than a 5-inch helical feather wrapped at a 3 to 4 degree
helical.

At about 1 degree offset (or 1/16th inch over the 4 inch vane length) the
QuikSpin will approach 3000 rpm or about twice as fast as a 5 inch helical
feather.

The spin is intentionally to the right. As a broadhead manufacturer, we
promote right spin for a very sound reason. Mainly right spin tightens the
arrow against the broadhead upon impact. With the spin intentionally to
the right, we recommend either straight, offset right or right helical.

The following information provides data on some of the testing we have
performed.

The first tests were designed simply to show us the number of rotations that
occur over 20 yards. The process was simple. We marked 1-yard increments
with tape on the floor. We then placed a shooting machine at each mark down
the range and shot a group of arrows with a specific vane/feather
configuration. The cock vane position resulting at the target was recorded
on a data sheet. The data sheets actually had 1-inch circles marked off
like the face of a clock so the visual position was easily marked. An
average for the group was taken and standard deviations were calculated.

The interesting thing about this type of test is that we could very quickly
see the comparisons from vane type to vane type.

Additionally we incorporated a chronograph set up at the target for each
recording distance. Knowing the speed at the target from each distance also
allow us to calculate RPM's and determine speed decay.

We determined with a rather detailed and complex series of tests that to
stabilize a broadhead at about 260 FPS the arrow needs to turn about 1
rotation over 3 yards.

Our previously recorded data was then able to provide even more information,
and in this case, very useable information. We looked at each data set and
found the range at which each fletching type produced 1 full turn.

A standard 4-inch vane (AAE, Duravane, Bohning, Etc.) with a 1/16th inch
offset reaches 1 full rotation between 12 to 15 yards.

A 5-inch helical feather with a 3 to 4 degree wrap reaches 1 full rotation
in between 4 and 7 yards.

A QuikSpin 4 inch perfectly straight reaches 1 full rotation between 4 and 7
yards.

A QuikSpin 4 inch with a 1/16th inch offset reaches 1 full rotation between
1 and 4 yards.

We find that the increase in rate of the rotational vector is greatest as
the arrow leaves the bow. Once the arrow begins to rotate 5 turns in 3
yards, the rotational acceleration slows down. However the spin rate
remains very high.