https://www.thevintagenews.com/2016/04/17/the-flying-anti-aircraft-battery-the-bell-yfm-1-airacuda-it-had-some-design-flaws/
Throughout the duration of the test flights for the first FM Airacuda, on the date of September 28th, 1939 one of the turbo superchargers exploded. The
anti aircraft batterybell yfmflyingairacuda