Grumpy Old Man
Verified Defense Pro
Works for me but the animal rights lobby here would likely kill this great idea.https://www.engadget.com/2017/01/19/swiss-cops-anti-drone-guns-world-economic-forum/
I like the dutch solution.. the RAAF could use real wedgetails
that's the punchline and the unknownThat anti-drone gun wouldn't appear to be effective against the kind of autonomous swarms eg. PERDIX, LOCUST recently demonstrated by he US Navy.
I have a question on fast jet canopies. How hot do they get during high speed flights? I'm interested for the following reason. Aircraft like F-22 have their canopies coated with a cake of transparent thin films some of which are electrical conductors, serving multiple purposes such as charge build up dissipation and radiation reflection. I have some ideas on such coating technologies that may be of use for this purpose (cheaper, high throughput, high quality in comparison to the traditional methods that are likely utilized in production of these). The one requirement for this to work that may be difficult to overcome is the temperature that the surface needs to be exposed to during the coating process.
Most polymers (which is what the canopies are mostly made of) do not like excessive temperatures. So what temperatures are we looking at, during high speed flight?
Yes, and there are ways to tune the reflectivity on the inner surface to reduce that backscatter.its more than signal/e emission, its also about back scattering physical reflections that could come back from inside the c0ckpit.
well, its a FRU and replacement is probably found somewhere within the maint manualsYes, and there are ways to tune the reflectivity on the inner surface to reduce that backscatter.
But my question is about how much heat the canopy can handle safely before it starts to degrade.
What is FRU?well, its a FRU and replacement is probably found somewhere within the maint manuals
I wouldn't have thought that its actually a regular event - they're designed to survive nearfield explosions - they're designed to survive g forces 4 levels above frame stress alerts - so there's a message in there already
Field replaceable unit, right? So you mean the entire canopy is FRU?What is FRU?
they're made in an autoclave - which is way above the heat generated in any stressed flight regimeField replaceable unit, right? So you mean the entire canopy is FRU?
I bet it's an expensive FRU... But I'm sure they designed it to withstand the stresses as well as temperature effects (those two, by the way, are not necessarily related). That is why I am wondering what those temperature exposures are (would give me a pretty good indication of what how hot the canopy can be heated in production).
There were reports that the Soviet Mig-31s had their speed ceiling reduced because the canopy could not handle the temperatures at very high speeds. I don't know what those canopies are made of, but it indicates that there is a significant thermal load on these things.The question is whether the temperatures that they are rated for in use are the same as those they're exposed to when they're made in an autoclave. Probably not.