Re: Wind effect through "tunnel" of trees
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: notquiteright</div><div class="ubbcode-body">I routinely shoot with old guys who can infact judge wind speed through mirage up to 20 mph. They shoot palma, service rifle, and other fits of bondage shooting with irons and a sling.
I have read Pejsa, Litz and a few others.
That helped me understand was something about epicycle. From that i decided the bullet nose doesnt turn away from the line of travel but can be temporarily influenced to orbit a bit wider around the axis of rotation.
The bullet isnt a missle, gyroscopic rotation imparts a direction of travel and the bullet's body aligns with it. Litz says a bullet can be upset by say muzzle blast as it exits the barrel but the nose doesnt go off like a Dragon that has lost signal but rather wobbles around the axis of travel and quickly settles back on a stable flight.
That got me thinking about the odd behavior the 155 Skinny has when traversing turlulent zones over firing berms on formal hoist and paste ranges. The 155's suddenly act like they are no longer a high BC bullet and suffer alot more wind drift than the balpro predicted, the early morning range session has confirmed.
Seems to me the extremely light in the nose lapuas get upset a tad like Litz's muzzle blast bullet but from the other much easier to influence end.
It doesnt change direction, it loses a bit of BC and accepts more drift.
I have watched more than one gust bodily shove a bullet to the side but not change its direction as some claim happen.
I have seen a shooter forget to apply windage- my bad as I didnt watch to confirm he had, I was watching mirage- and see a steady wind push the bullet in a slow arc some might describe as deflection.
Mostly i think some use the term deflection for its Geek appeal.
Che- not everyone can be the best at everything. I have seen instructors and national level team coaches read mirage and determine wind speed down range. The limit to that ability is as varied as their are Instructors who are capable of it.
To my mind its a skill that can literally be a life saver as in a hide sticking a kestrel up to get an idea of wind can be harzardous to the shooter's health.
In a match the ability to detect that gust and as we all know range flags lie, mirage never does. Learn to dope wind 3/4 of the way to target and off of ground level, ie above grass and low weeds, and you will have a tangible advantage.
Good Luck</div></div>
they are lying too you... they know what the wind speed is, usually from something else, and then they are trying to tell you they are reading it in the mirage...
Bullshit, it lays over, period.. you are not telling wind speed by the movement of the leaves, the rustling of the grass.. you get direction, not velocity.
We work with guys who's job it is to judge the wind, and they send up balloons, I have seen them predict a tornado, then within minutes see the funnel form where they said it would... every time they show up, I mean every time I talk wind with them, and across the field, 800 yards, 1000 yards, I ask them what the different objective moving can tell them, and they all say the same thing...<span style="font-weight: bold"> it's blowing. </span>
you get direction not velocity, you can make an educated guess, but that is all it is, a guess... the better you get the further downrange you judge conditions. But to tell me a mirage is telling you the difference between a 12 MPH wind, 14 MPH, 16, 18, or 20, without having read it at you, where all wind reading starts, at the shooter... bullshit. Can he tell a 8 over a 6MPH, absolutely but when it is laying flat. it gives you direction and will maybe spark a reading between gusts, but you have to have doped it at you first to know. Cold reading, without something to go by, no way... I do this almost every single day, wind class for an entire class at a time and while i can get damn close blind, it's only because I live on the range.
Range shooters are great for listening to what others say, you know guys with Kestrels, as well as knowing what home ranges will blow based on the prevailing winds, but take them out of their element into the unknown it's not happening. No way in hell they can tell, not without flags, other shooters, AND most importantly HOME FIELD ADVANTAGE. The Mirage isn't doing it alone above 12MPH. All it says, it's blowing hard from the right.
