主题：【原创】欣喜看重四之一：整体座舱盖与一反苏俄传统的人性化 -- TopGun

网上关于F-22整体座舱盖的描述，基本差不多。这里选globalsecurity.org的描述

外链出处

Canopy

座舱盖

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.

F-22整体座舱盖长140英寸，宽45英寸，27英寸高。它是一种旋转/平移式设计，意思是它先向下然后向前滑移，最后 用销子上锁。它的复杂性远比表面看起来高。

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.

F-22座舱盖是Sierracin（现PPG公司兼并）公司制造，是当今最大的单片聚碳酸酯材料成型部件。整体式，没有弓形框，整个视野1区（不仅是HUD（Head Up Display）附近）的光学性能极佳。具备隐身标准要求。

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.

座舱盖可抗化学/生物和环境介质，4磅/350节鸟击试验成功。座舱盖能保护飞行员免收雷击。

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.

F-22的整体座舱盖，是3/4英寸厚的聚碳酸酯板，实际上是两块3/8英寸加热熔焊在一起，然后锻造成型的。而F-16的整体座舱盖，作为比较，是鸟击防御方面性能更好些的层板结构（多层）。这是适合低空域行动的F-16的。层板结构重量相对较大，光学性能相对较差。

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.

飞行员弹（喷）射逃生后，几乎不可能发生与座舱盖的空中碰撞。因为整体座舱盖（连同边上的框架），被设计成一边略轻，一边略重。座舱盖弹（喷）射离开飞机后，因为自身两边的重量差，会成几乎90度，从而为飞行员闪开一条生路。

In testing so far, the cockpit canopy has fallen far short of its service life requirement according to DOT&E.

时至今日的测试，整体座舱盖的实际寿命比DOT&E的标准要求短。

注1/ 看过罗-罗发动机鸟击录像，记得是用冻鸡代替鸟，发射到发动机风扇叶片上的。这里有个Youtube，发动机鸟击试验。

[FLASH]http://www.youtube.com/v/lgspIiTFWIk[/FLASH]

注2/ 个人理解，整体座舱的隐身性能，应该是一种特殊的表面涂层提供的，而不是聚碳酸酯材料本身的性能。座舱盖抗化学/生物/环境物质的能力一定是有限的，相对的，或者说，是很低的。可以想象一下，F-22在飞沙走石的沙漠机场起降几次后，还能隐身不？