Dust sparks as it hits the rotor blades of a Blackhawk helicopter. This is known as the Kopp-Etchells effect.

individuals still use ALQ-144s? I thought they had been deemed very costly and finicky to be of good use a time that is long. http://en.wikipedia.org/wiki/AN/ALQ-144 AN/ALQ-144 : The AN/ALQ-144 , ...

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Some random comments on reddit about Dust sparks as it hits the rotor blades of a Blackhawk helicopter. This is known as the Kopp-Etchells effect.

  • people still use ALQ-144s? I thought they were deemed too expensive and finicky to be of use a long time ago.
  • http://en.wikipedia.org/wiki/AN/ALQ-144
  • AN/ALQ-144 : The AN/ALQ-144 , AN/ALQ-147 , and AN/ALQ-157 are US infra-red guided missile countermeasure devices ( IRCM ). They were developed by Sanders Associates in the 1970s to counter the threat of infra-red guided surface to air missiles like the 9K32 Strela-2 . While decoy flares were effective at jamming first generation infra-red guided missile s, each flare was only effective for a short period. If an aircraft needed to loiter over a high risk area or was flying slowly (as helicopters do), it would require a large number of flares to decoy any missile fired at it. The IRCM provided constant protection against infra-red guided missiles. Image i - An ALQ-144 jammer mounted on an OV-10 Bronco. Interesting: AN/ALQ-135 | Infrared countermeasure | List of military electronics of the United States | AN/ALQ-99 Parent commenter can toggle NSFW or delete . Will also delete on comment score of -1 or less. | FAQs | Mods | Magic Words
  • They're generally considered not as effective as current flares and they actually serve to highlight the aircraft more in some cases. 60s are old, that's why this aircraft still has one, you won't see them on new aircraft (at least none that I'm aware of).
  • I'd love to correct you on some of these items, but you're already treading water in a sea of OPSEC violations with your comment. Seeing that you have a MIL tag, I am quite surprised you would discuss such material. Please consider deleting your comment or editing it.
  • Any one have a 1920x1080 version of this
  • I checked TinEye - this was the largest image it found.
  • Yes, read a book about British pilots in Iraq. Their engineers put strips of some kind of tape on the leading edges of the blades. They'd replace it after every few flights but it saved the wear on the blades themselves.
  • Yes, it can. When I was in Afghanistan we would paint the main and tail rotor blades of our OH-58D's before every flight with black spray paint to prevent erosion on the leading edge. Some of the early model UH-60M's had a rubberized blade coating called Hontek to help with this, but it tends to peel off during flight in heavy rain. They stopped using it.
  • I found some on a blade yesterday. Does it look like a clear sticker?
  • Hontek looks like the rubberized bed liner for a pickup truck.
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