The P.108 was unique in the history of Italian aviation, as it was the only four-engine strategic bomber used by the Regia Aeronautica during World War II. It was a development of the earlier underpowered and wooden-structured P.50-II which was unable to take-off at its designed maximum weight. The designer of the aircraft was Giovanni Casiraghi, an experienced engineer who had previously worked in the US from 1927 to 1936. On the basis of his experience he designed a radically new aeroplane.
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