Minneguy wrote:With the tail wind of 10 mph, the lead is going to be almost the same because the wind is acting on both the shot and the bird, but I found that there is a range. If the bird is flying constant, and the wind only acts on the shot it will take 4.8 feet of lead. If the shot is constant and the bird is acted on by the wind, it will be 6.2 feet. That was tough and I'm almost certain I am incorrect but who knows haha
Ground speed is what you see. Air speed is what the bird feels. A bird that can fly 40 mph at top speed can fly at a maximum of 20 mph ground speed into a 20 mph and 60 mph with a tail wind. That's why they land into the wind. Keep their air speed up so they don't drop too fast, but minimize their ground speed so they touchdown softer.
My question is essentially this and I haven't seen the data. If you shoot at a fixed target with a cross wind, how far will it shift the center of the pattern. That's what you'd have to add or subtract from your lead when the calculation is based on ground speed. If you are using air speed, a duck hanging in a 20 mph head wind, has a 20 mph air speed and a 0 mph ground speed. The center of pattern will have to be adjusted to account for the effects of the wind. If the wind is at your back and he's coming straight at you, just put it right on him. If he's crossing, you are still going to need to lead him even though he looks like he is standing still. I just don't know if it is inches or feet. I think it's enough that it matters, but not as much zero wind and the duck having a ground speed of 20 mph.
BTW, good luck on your tests.