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Semi-monocoque structure inside an aircraft's rear fuselage ARV Super2 with semi-monocoque fuselage. The term semi-monocoque or semimonocoque refers to a stressed shell structure that is similar to a true monocoque, but which derives at least some of its strength from conventional reinforcement. Semi-monocoque construction is used for, among ...
Both monocoque and semi-monocoque are referred to as "stressed skin" structures as all or a portion of the external load (i.e. from wings and empennage, and from discrete masses such as the engine) is taken by the surface covering. In addition, all the load from internal pressurization is carried (as skin tension) by the external skin.
By contrast, a semi-monocoque is a hybrid combining a tensile stressed skin and a compressive structure made up of longerons and ribs or frames. [3] Other semi-monocoques, not to be confused with true monocoques, include vehicle unibodies, which tend to be composites, and inflatable shells or balloon tanks, both of which are pressure stabilised.
Four types of airframe construction: (1) Truss with canvas, (2) Truss with corrugate plate, (3) Monocoque construction, (4) Semi-monocoque construction. Modern airframe history began in the United States during the Wright Flyer's maiden flight, showing the potential of fixed-wing designs in aircraft.
The Ro.57 consisted of an all-metal, semi-monocoque fuselage with a steel skeleton and Duralumin structure. The wings were also Duralumin. It was powered by two 840 hp (630 kW) Fiat A.74 radial engines giving a maximum speed of 516 km/h, which in 1939 was faster than that of the main Italian fighter, the Macchi C.200 (504 km/h).
The XF13C was a naval fighter featuring an all-metal construction, with a semi-monocoque fuselage, manually retractable landing gear and an enclosed cockpit. The aircraft was designed to facilitate conversions from biplane to monoplane and vice versa.
Its primary contribution to aircraft design was its semi-monocoque construction, which would become a standard for future aircraft. Boeing employed the structural features of the XP-9 into their contemporary P-12 biplane fighter when the P-12E variant incorporated a semi-monocoque metal fuselage structure similar to that of the XP-9.
It had a semi-monocoque fuselage of pod-and-boom arrangement with a large bubble-like front greenhouse, [1] a three-blade rotor, and quadricycle fixed landing gear replacing the earlier tricycle arrangement. [4] The production S-52-3 (HO5S-1) incorporated a downward sloping (anhedral) v-tail stabilizer. [6]