Semi-monocoque
{{Short description|Type of vehicle structure}}
File:Semi monocoque fuselage structure.JPG
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.{{Cite web|url=http://www.merriam-webster.com/dictionary/semimonocoque|title = Definition of SEMIMONOCOQUE}}{{Cite web |url=http://www.aviationchatter.com/2010/01/semi-monocoque-mono-what/ |title=Semi Monocoque, Mono-what? |access-date=2015-10-17 |archive-url=https://web.archive.org/web/20160305223440/http://www.aviationchatter.com/2010/01/semi-monocoque-mono-what/ |archive-date=2016-03-05 |url-status=dead }} The Mooney range of four seat aircraft, for instance, use a steel tube truss frame around the passenger compartment with monocoque behind. Mooney article [https://www.planeandpilotmag.com/aircraft/brands/mooney/the-marvelous-mooney-m20/]
File:1973 Norton Monocoque at 1999 TT cropped.JPG 750 with sheet stainless steel semi-monocoque frame, exhibited at Castletown, Isle of Man in 1999]]
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."Pilot" magazine, June 1985 pages 5-6
Peter Williams' 1973 Formula 750 TT-winning John Player Norton racer was an early example of a semi-monocoque motorcycle.{{cite web |url=http://peterwilliamsmotorcycles.com |title=Peter Williams Motorcycles | Jpn Monocoque Replica |website=peterwilliamsmotorcycles.co |access-date=22 May 2022 |archive-url=https://web.archive.org/web/20130607173907/http://peterwilliamsmotorcycles.com |archive-date=7 June 2013 |url-status=dead}}