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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 ...
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.
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.
The Zeppelin-Lindau D.I had stressed skin fuselage and wings.. In mechanical engineering, stressed skin is a rigid construction in which the skin or covering takes a portion of the structural load, intermediate between monocoque, in which the skin assumes all or most of the load, and a rigid frame, which has a non-loaded covering.
Light aircraft have airframes primarily of all-aluminum semi-monocoque construction, however, a few light planes have tubular truss load-carrying construction with fabric or aluminum skin, or both. Aluminum skin is normally of the minimum practical thickness: 0.015 to 0.025 in.
The fuselage is actually a hull, which makes use of a semi-monocoque light alloy construction; according to aerospace publication Flight International, the hull design was "reminiscent of flying-boat engineering". [5] The main cabin lacks any transverse bracing, except for a single bulkhead between the cockpit and cabin.
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]
The airframe had a semi-monocoque fuselage with bicycle-type landing gear, short cropped delta wings of 37° leading edge sweep, with 5° anhedral, attached to the fuselage in a mid position.