Фонарь делает PPG Aerospace, технология изготовления, за некоторыми исключениями, аналогична фонарям F-16, доработанных по программе Have Glass II - у Ф-16 слои поликарбоната имеют прокладку, у Ф-22 они спекаются.
кое-что видно в их мурзилке на сайте http://buyat.ppg.com/REP_aerospace_f...es/F-16_tb.pdf
металлизируется *внутренняя* поверхность фонаря
Canopy
The F-22's canopy is approximately 140 inches long, 45 inches wide, 27 inches tall, and weighs approximately 360 pounds. It is a rotate/translate design, which means that it comes down, slides forward, and locks in place with pins. It is a much more complex piece of equipment than it would appear to be.
The F-22 canopy's transparency (made by Sierracin) features the largest piece of monolithic polycarbonate material being formed today. It has no canopy bow and offers the pilot superior optics (Zone 1 quality) throughout (not just in the area near the HUD) and it offers the requisite stealth features.
The canopy is resistant to chemical/biological and environmental agents, and has been successfully tested to withstand the impact of a four-pound bird at 350 knots. It also protects the pilot from lightning strikes.
The 3/4" polycarbonate transparency is actually made of two 3/8" thick sheets that are heated and fusion bonded (the sheets actually meld to become a single-piece article) and then drape forged. The F-16's canopy, for comparison, is made up of laminated sheets. A laminated canopy generally offers better birdstrike protection, and because of the lower altitude where the F-16 operates, this is an advantage. However, lamination also adds weight as well as reduced optics.
There is no chance of a post-ejection canopy-seat-pilot collision as the canopy (with frame) weighs slightly more on one side than the other. When the canopy is jettisoned, the weight differential is enough to make it slice nearly ninety degrees to the right as it clears the aircraft.
In testing so far, the cockpit canopy has fallen far short of its service life requirement according to DOT&E.
Ответить с цитированием