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Piaggio P.23M
The Piaggio P.23M was an Italian commercial transport aircraft prototype designed and built by Piaggio.
==Design and development==
Piaggio designed the P.23M specifically for flights across the North Atlantic Ocean, intending it to have potential for development as a commercial transport. It was a four-engine shoulder-wing monoplane with inverted gull wings and twin tail fins and rudders. To allow an easier landing if the aircraft had to ditch at sea, its fuselage was designed like a boat hull, which Piaggio termed an ''avion marin'' ("marine aviation") design, although the aircraft was not a flying boat. The main landing gear was retractable. The P.23Ms four Isotta-Fraschini Asso XI R. V-12 engines were mounted on the wings in two tandem pairs, each engine driving a two-bladed propeller; two of the propellers were mounted as pushers and the other two in a tractor configuration.
Piaggio claimed a top speed of 400 kilometers per hour (249 miles per hour) for the P.23 and projected its maximum range at a cruising speed of 300 km/h (186 mph) as 5,100 kilometers (3,169 statute miles).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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