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Old 09-25-2023, 12:08 PM   #154 (permalink)
aerohead
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'ballistics'

I believe that the 'Magnus effect' was originally observed with the 'KRUPP' artillery projectile, fired from a rifled cannon.
It would have been a state secret at the time. Classified. Involving another order of magnitude of sophistication in firing solutions to predict compensation for the spin-related 'lift'/ drift.
The Aberdeen Proving Grounds provided a subsonic-to-supersonic drag table for four projectiles in one of my reference texts, and the 'Krupp' ( 'soup-can ) projectile was one of the four listed.
Imagine a 'bullet' with a sub-MACH drag coefficient of 0.88!
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