{{Short description|World War I–era rotary aircraft engine}} {{infobox aero engine | name = 7Z | image = | caption = |engine_type= Rotary engine |national_origin = France |manufacturer= Clerget-Blin |first_run=1913 |major_applications= Avro 504 |number_built = 600 (French production)<br/>347 (British production) |developed_from =Clerget 7Y |developed_into = |variants_with_their_own_articles = }}

The '''Clerget 7Z''' was a seven-cylinder rotary aircraft engine of the World War I era designed by Pierre Clerget. First appearing in 1913 it was nominally rated at 80 horsepower (60&nbsp;kW). In addition to the 600 engines built in France by Clerget-Blin,<ref name=":Hartmann">{{cite web |last=Hartmann| first=Gerard |date=2003 |title=La société des moteurs Clerget|trans-title=The Clerget Motor Company|url= https://www.hydroretro.net/etudegh/clerget.pdf|language=FR |access-date=11 September 2024}}</ref> 347 examples were built under license in Britain by Gordon Watney & Co Ltd of Weybridge and Gwynnes Limited of Hammersmith.<ref name="Lumsden">Lumsden 2003, p. 133.</ref>

thumb|A French twin engine Caudron G4 fitted with Clerget rotary engines

==Applications== *Avro 504 *Beardmore W.B.III *Bristol S.S.A. *Caudron G.4 *Mosca-Bystritsky MBbis *Royal Aircraft Factory B.E.8a *Royal Aircraft Factory S.E.2 *Royal Aircraft Factory S.E.4 *Sopwith Pup *Weymann W-1

==Specifications (Clerget 7Z)== {{pistonspecs| <!-- If you do not understand how to use this template, please ask at Wikipedia talk:WikiProject Aircraft --> <!-- Please include units where appropriate (main comes first, alt in parentheses). If data are missing, leave the parameter blank (do not delete it). For additional lines, end your alt units with </li> and start a new, fully-formatted line with <li> --> |ref=''Lumsden and Gunston''.<ref name="Lumsden"/><ref>Gunston 1989, p, 41.</ref><ref name=JAWA1919>{{cite book|last=Grey|first=C.G.|title=Jane's All the World's Aircraft 1919|year=1969|publisher=David & Charles (Publishing) Limited|isbn=978-0-7153-4647-1|pages=1b to 145b|edition=Facsimile}}</ref> |type=Seven-cylinder air-cooled rotary engine |bore={{convert|120|mm|in|abbr=on|2}} |stroke={{convert|150|mm|in|abbr=on|2}} |displacement={{convert|11.88|L|cuin|abbr=on|2}} |length= |diameter={{convert|914|mm|in|abbr=on|2}} |width= |height= |weight={{convert|106|kg|lb|abbr=on|0}} |valvetrain=1 each overhead inlet and exhaust valves operated by pushrods and rockers |supercharger= |turbocharger= |fuelsystem=Bloctube carburettor |fueltype=Gasoline with Castor oil lubricant |oilsystem=Castor oil mixed with fuel |coolingsystem=Air-cooled |power={{convert|95|hp|kW|abbr=on|2|disp=flip}} at 1,300 rpm (maximum power) |specpower=0.1314 hp/cu in (5.98 kW/L) |compression=4.3:1 |fuelcon= |specfuelcon=0.564 L/kW/hour(0.74 pt/hp/hour) |oilcon= 0.0762 L/kW/hour (0.1 pt/hp/hour) |power/weight=0.67 kW/kg (0.406 hp/lb) }}

==See also== {{aircontent <!-- other related articles that have not already linked: --> |see also= *Clerget aircraft engines <!-- designs which were developed into or from this aircraft: --> |related=

<!-- aircraft that are of similar role, era, and capability this design: --> |similar aircraft=

<!-- relevant lists that this aircraft appears in: --> |lists= *List of aircraft engines

<!-- For aircraft engine articles. Engines that are of similar to this design: --> |similar engines= *Gnome Omega *Gnome Lambda *Anzani 10-cylinder *Le Rhône 9C <!-- See WP:Air/PC for more explanation of these fields. --> }}

==References== ===Notes=== {{reflist}}

===Bibliography=== {{refbegin}} *{{cite book|last=Grey|first=C.G.|title=Jane's All the World's Aircraft 1919|year=1969|publisher=David & Charles (Publishing) Limited|isbn=978-0-7153-4647-1|pages=1b to 145b|edition=Facsimile}} * Gunston, Bill. ''World Encyclopaedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989. {{ISBN|1-85260-163-9}} * Lumsden, Alec. ''British Piston Engines and their Aircraft''. Marlborough, Wiltshire: Airlife Publishing, 2003. {{ISBN|1-85310-294-6}}. {{refend}}

{{Clerget aeroengines}}

Category:Air-cooled aircraft piston engines Category:1910s aircraft piston engines 7Z Category:Rotary aircraft piston engines Category:Seven-cylinder engines