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Ever hear of the Eötvös effect?
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Neither had I, but I had heard of the Coriolis effect. Lapua explains both.

https://www.lapua.com/ballistics-app-ti ... k-c4hlr579


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Posts: 14197 | Location: Alamogordo, NM | Registered: 03 June 2000Reply With QuoteReport This Post
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The math is complex, but the concept is pretty simple. If you fire a bullet towards the east, the bullet will resist gravity and if you fire a bullet towards the west it "gains" gravity. While not as big of a factor as wind, drag, and Coriolis, the Eotvos effect can alter bullet drop by as much as 1%. No big deal at 300 yards but 1,000 and beyond it does matter. The greatest impact is along the equator and reduces as you move north or south from the equator.

The earth's rotational effect is why we launch rockets towards the east. Think of it as either a boost in speed or reduction in gravity.


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Posts: 22442 | Location: Occupying Little Minds Rent Free | Registered: 04 October 2012Reply With QuoteReport This Post
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Thanks Bill
 
Posts: 184 | Location: South Africa | Registered: 28 April 2020Reply With QuoteReport This Post
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Interesting, Thanks.
 
Posts: 3016 | Location: Kamloops, BC | Registered: 09 November 2015Reply With QuoteReport This Post
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Wow! Cool! It makes sense. Thanks for that!
 
Posts: 841 | Location: Grants Pass, OR | Registered: 24 September 2012Reply With QuoteReport This Post
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