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“Capt. Roald Amundsen, 4/1/22” (via)

This photograph shows Amundsen in a Junkers-Larsen JL-6, with John Larsen to his left. In May 1922, Amundsen took delivery of one of these aircraft -, with the intention of using it in a flight over the North Pole. Various issues resulted in this never taking place.

Larsen also developed the unsuccessful JL-12 “attack plane” - a variant of the JL-6 that housed 28 downwards-firing Thompson machine guns, delivering an estimated rate of fire of 700 rounds per second.

(see also: the Russian “fire hedgehog” of WW2 - 1,500 rounds per second!)