哪位大佬能帮我科普一下这个家伙背后的故事… - 5iMX.com 我爱模型玩家论坛 ——专业遥控模型和无人机玩家论坛（玩模型就上我爱模型，创始于2003年）

Sources differ on the P.7's engine; it is described both as an Isotta Fraschini Special V6 rated at 723 kW (983 PS; 970 hp) and as an Isotta Fraschini AS-5 of 745 kW (1,013 PS; 999 hp). The engine was connected both to a two-bladed automatic variable-pitch tractor propeller by a long metal shaft and by another shaft to a smaller marine propeller, similar to those used on motorboats, mounted beneath the aircraft's tail. To take off, the pilot would start the engine with the flight propeller feathered and the normal carburettor air intake closed and use a clutch to engage the tail propeller and get the aircraft moving through the water. The two hydrofoils, mounted beneath the fuselage on struts just forward of the wings similar to the way in which floats were mounted on floatplanes, would cause the P.7 to rise out of the water almost immediately. After the aircraft had risen on its hydrofoils and the flight propeller had cleared the water, the pilot would open the carburettor air intake, again employing the clutch to disengage the marine propeller, and use another clutch to engage the flight propeller, which automatically would switch from feathered to flight pitch. Driven by its flight propeller, the aircraft then would engage in a conventional takeoff, riding on its submerged hydrofoils until it reached takeoff speed.

Piaggio manufactured one P.7 and turned it over to the Italian Schneider Trophy racing team. Although some pilots refused to fly the aircraft, the Italian Schneider team's Tommaso dal Molin conducted some water tests on Lake Garda in northern Italy. The spray the hydroplanes generated made it difficult to see during takeoff, and persistent problems with both clutches ensued. The aircraft never became airborne.

5iMX.com 我爱模型 玩家论坛 ——专业遥控模型和无人机玩家论坛（玩模型就上我爱模型，创始于2003年）

5iMX.com 我爱模型玩家论坛 ——专业遥控模型和无人机玩家论坛（玩模型就上我爱模型，创始于2003年）