{{short description|1910s French piston aircraft engine}} {{infobox aero engine | name = 8G | image = Renault 190HP side view fig1.jpg | caption = |engine_type=Liquid-cooled V-8 piston engine |manufacturer=Renault |national_origin=France |first_run= |major_applications=Dorand AR.1 |number_built = |developed_from = |developed_into =Renault 12F |variants_with_their_own_articles = }}

The '''Renault 8G''' was a family of French liquid-cooled V8 aero engines of the World War I era that produced from {{convert|140|hp|kW|abbr=on}} to {{convert|190|hp|kW|abbr=on}}.

==Design and development== Construction used separate cast iron blocks for each pair of cylinders, mounted on a light-alloy crankcase with an included vee angle of 50 degrees. Each bank had a single overhead camshaft, shaft-driven through bevel gears. It was equipped with a single dual-choke updraught Zenith carburettor, and twin spark ignition through four magnetos. The crankshaft was a flat plane with three bearings and four throws, each pair of cylinders sharing a master-slave connecting rod onto the same crankpin.

==Variants== ;8G: {{convert|140|hp|kW|abbr=on}} ;8Ga: {{convert|150|hp|kW|abbr=on}} ;8Gb: {{convert|160|hp|kW|abbr=on}} ;8Gc: {{convert|175|hp|kW|abbr=on}} ;8Gd: {{convert|190|hp|kW|abbr=on}} ;8Gdy: {{convert|200|hp|kW|abbr=on}} ;8Ge: {{convert|200|hp|kW|abbr=on}}

== Applications == * Dorand AR.1 - '''Renault 8Gd''' - 1917 * Farman F.80 - '''Renault 8Gd''' * Dorand AR.2 - '''Renault 8Gdy'''

== Specifications (8Gd) == thumb|Section on cylinder {{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=<ref name="Renault 190 manual" >{{cite book |title=Renault 190 HP Notice descriptive et Règlement |publisher=Renault }}</ref> |type=50° V8 naturally aspirated liquid-cooled aircraft engine |bore={{convert|125|mm|in|abbr=on}} |stroke={{convert|150|mm|in|abbr=on}} |displacement={{convert|14.7|L|in3|abbr=on}} |length= |diameter= |width= |height= |weight= |valvetrain=Overhead camshaft-actuated, single intake and single exhaust valve per cylinder |supercharger= |turbocharger= |fuelsystem=Twin-choke updraught carburettor |fueltype= |oilsystem=Wet sump |coolingsystem=Water |power=<br> *{{convert|192|hp|kW|abbr=on}} at 1,500 rpm *{{convert|196|hp|kW|abbr=on}} at 1,550 rpm ''son régime normal'' *{{convert|200|hp|kW|abbr=on}} at 1,600 rpm ''son régime maximum'' |specpower=9.93&nbsp;kW/L (0.22&nbsp;hp/in<sup>3</sup>) |compression= |fuelcon= |specfuelcon= |oilcon= |power/weight= }}

==See also== {{aircontent <!-- other related articles that have not already linked: --> |see also=

<!-- designs which were developed into or from this aircraft: --> |related=

*Renault 12F - A family of V12 engines sharing the same cylinder size and bank angle as the 8G |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= *Hispano-Suiza 8 *Sunbeam Arab <!-- See WP:Air/PC for more explanation of these fields. --> }}

== References == {{commons category|Scans from 'Renault 190HP aircraft engine manual'}} {{reflist}}

==External links==

* [https://archive.org/details/renault-moteur-daviation-150-chevaux Renault Moteur d'aviation 150 chevaux - Notice descriptive sur le Fonctionnement et l'Entretien. Renault.] (Renault 8Ga 150hp)

{{Renault aeroengines}}

Category:1910s aircraft piston engines 8G Category:V8 engines Category:Liquid-cooled aircraft piston engines