Editing Bristol Jupiter (section)

==Variants==
The Jupiter was produced in many variants, one of which was the Bristol Orion of 1926. [[Metallurgy]] problems with this turbo-supercharged engine caused the project to be abandoned after only nine engines had been built.<ref>Lumsden 2003, p.101.</ref>
;Brazil Straker (Cosmos) Jupiter I
:(1918) {{convert|400|hp|kW|abbr=on}}; only two engines assembled.
;Cosmos Jupiter II
:(1918) {{convert|400|hp|kW|abbr=on}}; a single engine assembled.
;Bristol Jupiter II
:(1923) {{convert|400|hp|kW|abbr=on}}.
;Bristol Jupiter III
:(1923) {{convert|400|hp|kW|abbr=on}}.
[[File:BristolJupiter.JPG|thumb|right|Bristol Jupiter VII on display at the [[Shuttleworth Collection]]]]
;Bristol Jupiter IV
:(1926) {{convert|430|hp|kW|abbr=on}}; fitted with variable valve timing and a Bristol Triplex carburettor.
;Bristol Jupiter V
:(1925) {{convert|480|hp|kW|abbr=on}}.
;Bristol Jupiter VI
:(1927) {{convert|520|hp|kW|abbr=on}}; produced in both high- (6.3:1) and low- (5.3:1) [[compression ratio]] versions.
;Bristol Jupiter VIA
:(1927) {{convert|440|hp|kW|abbr=on}}; civil version of Jupiter VI.
;Bristol Jupiter VIFH
:(1932) {{convert|440|hp|kW|abbr=on}}; version of Jupiter VI equipped with gas starter motor.
;Bristol Jupiter VIFL
:(1932) {{convert|440|hp|kW|abbr=on}}; version of Jupiter VI with compression ratio of 5.15:1.
;Bristol Jupiter VIFM
:(1932) {{convert|440|hp|kW|abbr=on}}; version of Jupiter VI with compression ratio of 5.3:1.
;Bristol Jupiter VIFS
:(1932) {{convert|400|hp|kW|abbr=on}}; version of Jupiter VI with compression ratio of 6.3:1.
;Bristol Jupiter VII
:(1928) {{convert|375|hp|kW|abbr=on}}; fitted with supercharger, with compression ratio of 5.3:1; also manufactured by Gnome-Rhone as the '''9ASB'''.
;Bristol Jupiter VIIF
:(1929) {{convert|480|hp|kW|abbr=on}}; version of Jupiter VII with forged cylinder heads.
[[File:Bristol Jupiter VIIIF 2.jpg|thumb|right|Preserved Bristol Jupiter VIIIF]]
;Bristol Jupiter VIIFP
:(1930) {{convert|480|hp|kW|abbr=on}}; version of Jupiter VII with pressure feed lubrication to wrist-pins.
;Bristol Jupiter VIII
:(1929) {{convert|440|hp|kW|abbr=on}}; first version with propeller reduction gearing;<ref name=UdvarHazy>{{cite web|url=https://airandspace.si.edu/collection-objects/bristol-jupiter-viiif-radial-engine |title=Bristol Jupiter VIIIF Radial Engine |website=National Air and Space Museum |publisher=Smithsonian Institution |access-date=13 May 2018}}</ref> compression ratio 6.3:1.
;Bristol Jupiter VIIIF
:(1929) {{convert|460|hp|kW|abbr=on}}; version of Jupiter VIII with forged cylinder heads and lowered compression ratio (5.8:1).
;Bristol Jupiter VIIIFP
:(1929) {{convert|460|hp|kW|abbr=on}}; version of Jupiter VIII with pressure feed lubrication ([[time between overhauls]] at this stage in development was only 150 hours due to multiple failures).
[[File:Air-cooled 9-cylinder Cosmos-Bristol Jupiter IX radial engine (Ans 05338-02-181-AL-FL).jpg|thumb|right|Jupiter IX]]
;Bristol Jupiter IX
: {{convert|480|hp|kW|abbr=on}}; compression ratio 5.3:1.
;Bristol Jupiter IXF
: {{convert|550|hp|kW|abbr=on}}; version of Jupiter IX with forged cylinder heads
;Bristol Jupiter X
: {{convert|470|hp|kW|abbr=on}}; compression ratio 5.3:1.
;Bristol Jupiter XF
: {{convert|540|hp|kW|abbr=on}}; version of Jupiter X with forged cylinder heads
;Bristol Jupiter XFA
: {{convert|483|hp|kW|abbr=on}}
;Bristol Jupiter XFAM
: {{convert|580|hp|kW|abbr=on}}
;Bristol Jupiter XFBM
: {{convert|580|hp|kW|abbr=on}}
;Bristol Jupiter XFS
:Fully supercharged.
;Bristol Jupiter XI
:Compression ratio 5.15:1.
;Bristol Jupiter XIF
: {{convert|500|hp|kW|abbr=on}}; compression ratio 5.15:1.
;Bristol Jupiter XIFA
: {{convert|480|hp|kW|abbr=on}}; version of Jupiter XIF with 0.656:1 propeller gear reduction ratio
;Bristol Jupiter XIFP
: {{convert|525|hp|kW|abbr=on}}; version of Jupiter XIF with pressure feed lubrication.
;Bristol Orion I
:(1926) Jupiter III, turbo-supercharged, abandoned programme.
;Gnome-Rhône 9A Jupiter:French licence production primarily of 9A, 9Aa, 9Ab, 9Ac, 9Akx and 9Ad variants.
;[[Siemens-Halske Sh20, Sh21 and Sh22]]: Siemens-Halske took out a licence in Germany and produced several versions of increasing power, eventually resulting in the [[Bramo 323 Fafnir]], which saw use in wartime models.
;[[Nakajima Ha-1 Kotobuki]]: In Japan, the Jupiter was licence-built from 1924 by Nakajima.
;PZL Bristol Jupiter: Polish production.
;[[Alfa Romeo Jupiter]]: Italian licence production, {{convert|420|hp|kW|abbr=on}}.
;[[Alfa 126 R.C.35]]: Alfa Romeo developed variant
;Walter Jupiter: Licence production in Czechoslovakia by Walter Engines
;Shvetsov M-22: The most produced version; manufactured in the [[Soviet Union]].
;IAM 9AD Jupiter: Licence production of the Gnome-Rhône 9A in [[Yugoslavia]]
;SABCA Jupiter: licensed production in [[Belgium]] by [[SABCA]] (''Société Anonyme Belge de Constructions Aéronautiques'')
;Piaggio-Jupiter: Licensed production by Piaggio