Gyroscopic (spin) Drift and Coriolis Effect By: Bryan Litz Most long range shooters are aware of the effects of gravity, air resistance (drag) and wind on their bullets trajectory. There are many commercial ballistics programs on the market that do a fine job of predicting trajectories which only account for gravity, drag and wind. Gravity drag and wind are the major forces acting on a bullet in flight, but they’re not the only forces. In this article, I’ll explain some of the more subtle forces that influence the path that bullets take. Gyroscopic drift and Coriolis acceleration is the subject of this article. These effects are commonly misunderstood by many long range shooters for a couple reasons. The first reason is because their effects are small in comparison to other factors. Secondly, the theory behind them can be difficult to understand. Big or small, understood or not, these influences affect every trajectory in a predictable way. I’ll try to explain where these forces come from, what practical consequence they have on your trajectories, and what you can do to predict and correct for them. appliedballisticsllc/Articles/ABDOC108_GyroscopicAndCoriolis.pdf
Posted on: Wed, 22 Jan 2014 06:12:41 +0000
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