B An arrow vane claim (fletchings as airfoils)

[southshorerat]

TL;DR Summary

There is a manufacture in archery industry that claims the vane is an air foil design

He also claims the vane design creates lift which I accept

My problem is he also says the vane will cause the arrow to spin 200 time within 60ft of flight

How can something spinning efficiently use lift produced by the vane

He claims the arrow develops a gyro effect

 

[DaveC426913]

How can something spinning efficiently use lift produced by the vane

Without claiming any authority on the subject at all, I don't see why this is a problem - at least in principle.
It's not like an airplane's wings producing lift symmetrically and normal to the ground on both sides of its fuselage.

If the vanes of an arrow were to produce "lift", it would more accurately be called spin - they would all work in the same direction (clockwise or counterclockwise) around the axis, which would impart the rotational stability - like a gyro.

 

[Baluncore]

A wind turbine is driven to spin because all the blades develop lift, and are twisted in the same sense.
An arrow spins because the vanes are mounted slightly diagonally. It is more efficient to develop the rotational lift with an airfoil than with a flat plate. By more efficiently converting the forward velocity into spin, the arrow has less drag and so will travel slightly further and faster.

 

[southshorerat]

 

[southshorerat]

Disregard my last post it did not load correctly

 

[southshorerat]

http://org.firenock.com/pdf/2020_Catalog.pdf

 

[southshorerat]

Please refer to the portion of this PDF concerning arrowflight 101

Do the theories concerning circular lift and gyroscopic precession hold true

 

[DaveC426913]

Please refer to the portion of this PDF concerning arrowflight 101

Do the theories concerning circular lift and gyroscopic precession hold true

Sorry, you want us to read a page from a PDF product ad that you posted, and tell you whether or not all or part of it is true?

 

[southshorerat]

No I provided information so you could understand my original questions and apply physics to two questions

1 Can a vane that has an airfoil design produce lift

2 Can an arrow spin fast enough to produce gyroscopic precession

 

[DaveC426913]

Yes and yes.