Ｂ－２隐身轰炸机加快试验进度美国空军对Ｂ－２隐身轰炸机１９９３年加快了飞行试验进度，与过去３年半的飞行试验相比，已经接近其２倍。１９９３年１月至１２月初，Ｂ－２试验飞机编队已飞行了将近５００ｈ．而过去平均每年飞行２９０ｈ。主要的合同依据点是预期在１９... B-2 stealth bomber to speed up the test progress The United States Air Force accelerated the flight test progress on the B-2 stealth bomber in 1993, nearly two times its flight test over the past three and a half years. From January to early December 1993, the B-2 experimental aircraft formation had flown for almost 500 hours. In the past, the average annual flight 290h. The main contract basis point is expected at 19 ...