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美国未来的战斗机大量用钛美国空军正在开发与制造一种可于２００４年服役的新型战斗机Ｆ－２２，用来代替Ｆ－１５型飞机。这种新型战斗机的长度超过１９ｍ，高约５ｍ，翼展１３．４ｍ，计划于１９９７年定型，１９９８年开始以较小的批量生产，到２０２０年将生产出４４...
US future fighter jets used extensively The U.S. Air Force is developing and manufacturing a new fighter, F-22, to be available in 2004 to replace the F-15 aircraft. The new fighter has a length of more than 19m, a height of about 5m and a wingspan of 13.4m. It is scheduled to be finalized in 1997 and will be manufactured in smaller batches in 1998 and will produce 44 ...