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I-15 Bis(CN) 伊-15比斯（中华民国空军）

The Polikarpov I-15 (Russian: И-15) was a Soviet biplane fighter aircraft of the 1930s. Nicknamed Chaika (Russian: Чайка, "gull") because of its gulled upper wings,it was operated in large numbers by the Soviet Air Force, and together with the Polikarpov I-16 monoplane, was one of the standard fighters of the Spanish Republicans during the Spanish Civil War, where it was called Chato (snub-nose)

First flown in 1933, the Polikarpov I-15 was a stout, albeit extremely maneuverable, biplane fighter. It featured a gull-shaped upper-wing, which proved unpopular with many Soviet pilots. Taking this feedback into account, Polikarpov updated the design in 1937 as the I-15bis, which featured a more conventional wing. The Soviets continued to develop the design, as many still considered that a biplane’s maneuverability advantage over monoplanes would still play a significant, positive role in air-to-air combat during any coming conflict.

I-15s were supplied in quantity to the Chinese government which was resisting a Japanese invasion. The Chinese received 255 of these nimble fighters during the fall of 1937, with a total of 347 I-15 and I-15bis arriving by 1939. 250 Soviet pilots volunteered to fly the aircraft in combat over China, predecessors to the later American Volunteer Group which came to support China in 1941 following the Soviets pull-out.

model from warthunder.

波利卡波夫 伊-15（俄语：И-15）是苏联 20 世纪 30年代的一款双翼战斗机。因其上翼呈鸥翼状而被昵称为“海鸥”（俄语：Чайка），该机型在苏联空军中大量服役，并且与波利卡波夫 伊-16 单翼机一起，成为西班牙内战期间西班牙共和军的标准战斗机，在那里它被称为“塌鼻子”。

伊-15 战斗机于 1933 年首飞，这是一款结实但极其灵活的双翼战斗机。其上翼呈鸥翼形，这在许多苏联飞行员中并不受欢迎。考虑到这一反馈，波利卡波夫于 1937 年对其进行了改进，推出了 伊-15比斯 型号，该型号采用了更为传统的机翼设计。苏联继续对该设计进行改进，因为许多人仍然认为双翼飞机在空战中的机动性优势在任何即将发生的冲突中仍将发挥重要作用。

1937 年秋季，中国抵抗日本侵略期间，大批 伊-15 战斗机被供应给中国政府。到 1939 年，中国共接收了 347 架 伊-15 和 伊-15B 型飞机。250 名苏联飞行员志愿驾驶这些飞机在中国上空作战，他们是后来于 1941 年在苏联撤出后支援中国的美国志愿航空队的先驱。

模型来自战争雷霆