Frey #4 post- Not Jim Frey once in Toledo by chance?? I see-frey is just shortened Jeffrey, most likely.
Sir: The fluid dynamic associated with this effect is that air passing over a lifting surface produces lift. In BR [even rim fire BR] a wind from the left when combined with the bullet rotation provides lift to the bullet causing a deflection to the right[due to the wind from the left] but also a slight lift[up]to the POI. In summary: A wind from the left deflects the bullet to the right and slightly up while a wind from the right deflects the bullet to the left and slightly down. Knowing about this affect one can tighten groups if one can properly read the wind. BE WELL....V/r mk
It might just be a case of where I'm located (SE USA), but
the wind from the right (L<--R)) usually pushes the bullet up and left, and
the wind from the left (L-->R) usually pushes the bullet down and right.
Frey #4 post- Not Jim Frey once in Toledo by chance?? I see-frey is just shortened Jeffrey, most likely.
Since your bullets dont behave in the 'normal' manner perhaps your barrel has a Left twist??
Really? That's sad, because it's right. It follows McCoy, Vaughn, and while I haven't read it, I would suspect Bian Litz' new book.And my explanation disagrees with every other source you'll find on the web!!
LOL
al
Don't bring it over onto the centerfire board cuz yer ALL wrong! (Except the guys who got the left/up and right/down sorted out. Bullets are pushed left/up and right/down when using a rh twist)
The up/down effect is driven by drag caused by the wind trying to tip the bullet over, producing a gyroscopic force called precession which causes the bullet to tip a little and stabilize at an angle called "equilibrium yaw" or the yaw of repose........... which in turn produces a lift force at 90 degrees ahead (up rotation) of the wind force. This runon sentence is severely short-cutted and incomplete, but it's still YAW that produces the imbalance of pressure that drags bullets up or down.
This is the same combination of forces that produces spindrift in still air.
And my explanation disagrees with every other source you'll find on the web!!
LOL
al
Al,
Did you see Jayden Quinlan's explanation of wind deflection in Precision Shooting August 2011? Good for a rant ... or a laugh.
Cheers,
Keith
alinwa,
as I'm not in the habit of spreading misinformation, please enlighten us. Does the link I posted contain errors/mistakes?
Not being confrontational, just a polite response.
Take care sir,
warren russell westphal jr.