Earth rotation and long range shooting?

At what point does Earth rotation become a factor in long range shooting, and how many clicks to compensate with an MOA scope. Windage/Elevation?

2 Answers

  • rowlfe
    Lv 7
    7 years ago
    Favorite Answer

    The rotation of the earth does not affect the ballistic path of a bullet. It simply does not go high enough. It takes getting to an altitude of over 100,000 feet before the effect of the earth rotating can be felt. All satellites use this to their advantage at launch time. Heading east adds about 1000 MPH to the velocity upon reaching orbit, which means less fuel is needed to reach the 17,000 MPH necessary to achieve orbit. Newton's laws apply here. You are in motion with the earth as the bullet. Imagine a trampoline in the back of a semi traveling down the road. What happens when you jump on the trampoline? The same thing happens to the bullet relative to the earth. So, bottom lie, NO correction is required for the rotation of the earth. Newton proposed a thought experiment, firing a shell parallel to the ground. Of course, it falls to the ground at some distance. Then, what about increasing the powder charge? The shell travels further and further as you increase the powder. eventually, the fall of the shell would match the curvature of the earth below, resulting in you shooting yourself in the back. This only can work with a perfect sphere and no air resistance but the concept IS that of a satellite in orbit. Like DaVinci, Newton came up with the idea of something long before it could actually be done.

  • Anonymous
    7 years ago

    they will teach you to compensate for the Coriolis effect at sniper school . so unless you are shooting deer a mile away you don't need to know .

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