道格拉斯B-18 Bolo——照片和视频

这 道格拉斯B-18波罗 is an American medium bomber which served with the United States Army Air Corps and the Royal Canadian Air Force (as the Digby) during the late 1930s and early 1940s. The Bolo was built by the Douglas Aircraft Company, based on its DC-2, and was developed to replace the Martin B-10. By 1940, it was considered to be underpowered, to have inadequate defensive armament, and to carry too small a bomb load. Many were destroyed during the attacks on Pearl Harbor and the Philippines in December 1941.

源： 道格拉斯B-18波洛在维基百科上的内容

道格拉斯B-18 Bolo是1930年代为美国陆军航空队开发的中型轰炸机。它基于DC-2商用客机，旨在取代马丁B-10作为空军的标准轰炸机。然而，它很快就被更先进的波音B-17飞行堡垒和联合B-24解放者所掩盖，后者具有更大的速度，航程和有效载荷能力。B-18在第二次世界大战期间主要用于海岸巡逻和反潜战，以及训练和运输任务。总共建造了350架B-18，其中122架被改装为B-18A变体，具有更强大的发动机和改进的防御武器。B-18还出口到巴西，加拿大和多米尼加共和国。