美国人布里格·吉恩米切尔在本世纪20年代初设想的XNBL-1轰炸机被认为是当时世界上最大的一架轰炸机,也是世界上首架大型轰炸机,但它在1923年还未首飞就已陈旧过时。为实现其设想,米切尔请飞机设计师沃尔特·巴林设计了能携带足以炸沉一艘战舰的重型炸弹的XNBL-1轰炸机。但在1921年的一次演示中,米切尔使用当时已有的飞机炸沉了一 The XNBL-1 bomber, which was designed by the American Brigitte Mitchell in the early 1920s, is considered to be the world’s largest bomber and the first large-scale bomber in the world, but it has not been in 1923 The first flight is outdated. To realize his vision, Mitchell asked aircraft designer Walter Bahrain to design an XNBL-1 bomber capable of carrying heavy bombs enough to sank a battleship. But in a 1921 demonstration, Mitchell sank one using the then existing aircraft