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 other things, aircraft fuselages, car bodies and motorcycle frames.
Examples of semi-monocoque vehicles
Semi-monocoque aircraft fuselages differ from true monocoque construction through being reinforced with longitudinal stringers. The Mooney range of four seat aircraft, for instance, use a steel tube truss frame around the passenger compartment with monocoque behind.
The British ARV Super2 light aircraft has a fuselage constructed mainly of aluminium alloy, but with some fibreglass elements. The cockpit is a stiff monocoque of "Supral" alloy, but aft of the cockpit bulkhead, the ARV is conventionally built, with frames, longerons and stressed skin forming a semi-monocoque.
- "Definition of SEMIMONOCOQUE".
- "Semi Monocoque, Mono-what?". Archived from the original on 2016-03-05. Retrieved 2015-10-17.
- Mooney article 
- "Pilot" magazine, June 1985 pages 5-6
- "Peter Williams Motorcycles | Jpn Monocoque Replica". peterwilliamsmotorcycles.co. Archived from the original on 7 June 2013. Retrieved 22 May 2022.