Thursday, October 06, 2022

The Kopp–Etchells Effect



In desert conditions, helicopter rotors are sometimes surrounded by sparkling rings. When flying sand strikes the abrasion strips on the leading edges of the blades, clouds of eroded titanium particles ignite as they’re exposed to oxygen.

The effect is most visible at night when the aircraft is near the ground, but it’s been observed as high as 1700 feet. It’s named after Benjamin Kopp and Joseph Etchells, two soldiers killed in combat in Afghanistan in July 2009.

https://rangersremembered.com/portfolio/cpl-benjamin-kopp/ Kopp was on his 3rd deployment, he was from Minnesota

2 comments:

  1. Well good be related comparison of Helicopters and prostitutes... No Visible Means Of Support!

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  2. I wonder if this has anything to do with the comparison of Helicopters and Hookers? No Visible Means of Support last time I looked.

    ReplyDelete