Thread: Which is the best wind meter for wind estimation

Originally Posted by ebf

fukit, here goes anyway

if you type in 10mph wind from 90 degrees in a ballistics calc like JBM, that means 10mph average, right ?

so 10mph blowing across the entire range the projectile is traveling ?

so if 10mph right wind gives 1 inch left deflection @ 100m (not actual, just for argument sake), some folks are saying that the deflection @ 1000m will be 10 times the 100m deflection i.e. 10 inches...

but if wind causes a deflection because of sideways pressure on the projectile (like the large ship example mentioned), would the effect not be compounded as opposed to linear ? test it for yourself, to me it looks more linear than compound, so maybe something else is going on ?

i think the danger is looking at a projectile as if it is a large polystyrene ball, and thinking that the force vectors involved with wind have a similar effect as those of forward velocity and rotational stabilization. now think of a modern hpbt design projectile, with very high forward velocity, high degree of stability due to rotation, and how those forces are working against any deflection due to wind...

something else to ponder... if you take a "yacht" shape, and put a dowel or mast thru it from top to bottom, exactly in the center. now imagine it pivots on that dowel. put the shape in a stream of flowing water. will the pointy bit (bow) turn upstream or downstream ?

As the bullet slows down while it is travelling the wind has the ability to effect for longer thus pushing it further off course the longer the distance