بدن الطائرة ( بدأ إنتاجها قبل 16 سنة وتوقف إنتاجها قبل 5 سنوات ) يحتوي على 20 بالمئة من
الcomposite materials من هذه ال20 بالمئة 90 بالمئة CFRP.
بدن أحدث طائرة حالياً F-35 يحتوي علي 35 بالمئة من الcomposite materials ، بدن الF-15E لايتجاوز ال2 بالمئة
الـ CM لها فوائد عديدة
Composite materials have a wide variety of commercial and industrial uses, ranging from aircraft and automobile to computer parts. Composite materials have many advantages which make them attractive to different industries. For instance,
composite materials can reduce heat transfer, resist conduction of electricity, limit reflection of radar waves, are flexible but strong, and can be fairly easily formed into complex shapes during manufacturing. Some examples of commercial applications include the complex shapes of certain automobiles, airplanes, and boats which would be difficult to form with metal materials.
Another important use of composite materials is the creation of stealth aircraft which minimize their radar cross section through the use of radar absorbing composite materials that form the majority of the aircraft's structure.
One example of an aircraft made largely from composite materials is the F-22 Raptor, the world's premier tactical aircraft, designed and manufactured by Lockheed Martin Tactical Aircraft Systems. The Raptor's composite parts are formed with flexible graphite fibers, called a ply, that are impregnated with epoxy or BMI resins which harden when subjected to the application of heat. The uncured plies are placed on tools, each tool corresponding to a composite part of the Raptor. Thus, when the graphite resin mixture hardens over the tool, the composite part is formed with the proper shape.
http://www.globalsecurity.org/military/world/stealth-aircraft-material.htm
ان يكون لدى اليابانيين هذا الفهم العميق بأسس نجاح المقاتلات في مجابهة تحديات العصر والمستقبل ( الـ Stealth احداها ) .. جعلتهم يصيغون مقاتلتهم القادمة بأسس صحيحة
حتى في بداية برنامجها كمنصة لعرض وبرهنة التكنولوجيا ,,, نجد ذات الفهم ( الذي هو بلاشك مبني على التجارب الناجحة المبرهنة ) يمتد للمستقبل الياباني ..
The aircraft—an “advanced technology demonstration unit,” according to the Defense Technical Research and Development Institute –unveiled to the press will not be armed and is slated to be retired in three years, after having undergone extensive tests of advanced fifth-generation fighter technologies, for which Japan’s Defense Ministry has allocated 2.3 billion yen ($19.3 million) in the next fiscal year alone. It will be a testbed platform for multiple technologies including next generation electronically scanned array radar systems, multi-dimensional 3D thrust vectoring concepts, and fine-tune the aircraft’s stealth capabilities. (
The X-2 features a special carbon-fiber composite material that absorbs radar waves.)
http://thediplomat.com/2016/01/japan-unveils-new-5th-generation-stealth-fighter-jet/
