Editing Bristol Hercules (section)

==Variants==
[[File:Varsity-WF369-01.jpg|thumb|right|Hercules fitted to a [[Vickers Varsity]] on display at the [[Newark Air Museum]]]]
[[File:Bristol Hercules Kbely.JPG|thumb|Bristol Hercules in Aviation Museum Kbely, Prague]]
[[File:bristol.hercules.arp.750pix.jpg|thumb|right|Bristol Hercules engine. Note the absence of pushrods on the cylinders. Each cylinder has two exhaust ports on the front (short L-shaped tubes) and three intake ports on the back supplied through a single manifold.]]
[[File:Bristol Hercules XVII Aircraft engine - side.jpg|thumbnail|Bristol Hercules XVII engine]]

'''Hercules I''' (1936) – {{cvt|1150|hp|kW}}, single-speed [[supercharger]], run on 87 [[Octane rating|octane]] fuel.{{sfnp|Lumsden|1994|p=119}}

'''Hercules II''' (1938) – {{cvt|1375|hp|kW}}, single-speed supercharger, run on 87 octane fuel.{{sfnp|Lumsden|1994|p=119}}

'''Hercules III''' (1939) – {{cvt|1400|hp|kW}}, two-speed supercharger, run on either 87 or 100 octane fuel.{{sfnp|Lumsden|1994|p=120}}

'''Hercules IV''' (1939) – {{cvt|1380|hp|kW}}, single-speed supercharger, run on 87 octane fuel.{{sfnp|Lumsden|1994|p=120}}

'''Hercules V''' (1939) – {{cvt|1380|hp|kW}}, civil prototype derived from the Hercules IV but not developed.{{sfnp|Lumsden|1994|p=120}}

'''Hercules VI''' (1941) – {{cvt|1615|hp|kW}}, two-speed supercharger, run on either 87 or 100 octane fuel.{{sfnp|Lumsden|1994|p=120}}

'''Hercules VII''' production cancelled.{{sfnp|Lumsden|1994|p=120}}

'''Hercules VIII''' – {{cvt|1650|hp|kW}}, very high-altitude version of the Hercules II, single-speed supercharger with an auxiliary high-altitude single-speed 'S' supercharger.{{sfnp|Lumsden|1994|p=120}}

'''Hercules X''' (1941) – {{cvt|1420|hp|kW}}, derived from the Hercules III.{{sfnp|Lumsden|1994|pp=120-121}}

'''Hercules XI''' (1941) – {{cvt|1590|hp|kW}}, derived from the Hercules III, run on 100 octane fuel.{{sfnp|Lumsden|1994|p=121}}

'''Hercules XII''' – derived from the Hercules IV.{{sfnp|Lumsden|1994|p=121}}

'''Hercules XIV''' (1942) – {{cvt|1500|hp|kW}}, developed for the civil market and used by [[BOAC]], run on 100 octane fuel.{{sfnp|Lumsden|1994|p=121}}

'''Hercules XVMT''' – {{cvt|1650|hp|kW}}, very high-altitude development of the Hercules II, single-speed supercharger with an auxiliary high-altitude [[turbo-supercharger]].{{sfnp|Lumsden|1994|p=121}}

'''Hercules XVI''' (1942) – {{cvt|1615|hp|kW}}, two-speed supercharger, run on either 87 or 100 octane fuel.{{sfnp|Lumsden|1994|p=121}}

'''Hercules XVII''' (1943) – {{cvt|1615|hp|kW}}, two-speed supercharger locked in 'M' gear.{{sfnp|Lumsden|1994|p=121}}

'''Hercules XVIII''' – low-level development of the Hercules VI with cropped {{cvt|12|in|mm}} supercharger [[impeller]]s.{{sfnp|Lumsden|1994|p=121}}

'''Hercules XIX''' (1943) – {{cvt|1725|hp|kW}}, a development of the Hercules XVII, the two-speed supercharger had cropped {{cvt|12|in|mm}} impellers locked in 'M' gear.{{sfnp|Lumsden|1994|p=121}}

'''Hercules XX''' – similar to the Hercules XIX.{{sfnp|Lumsden|1994|p=121}}

'''Hercules 36''' – a development engine derived from the Hercules VI and Hercules XVI, run on 100 octane fuel. The '''Hercules 38''' was a further development of the Hercules 36.{{sfnp|Lumsden|1994|p=121}}

'''Hercules 100''' (1944) – {{cvt|1675|hp|kW}}, the first in a new sub-series of Hercules engines designed primarily for the impending post-war civil market. The entire series was split, some versions had standard [[Epicyclic gearing|epicyclic reduction gearing]] and parallel versions had a new [[torquemeter]]-type reduction gearing.{{sfnp|Lumsden|1994|pp=121-122}}

'''Hercules 101''' – {{cvt|1675|hp|kW}}, developed from the Hercules 100. The '''Hercules 103''' was the torquemeter version. The '''Hercules 110''' was a further development of the Hercules 101.{{sfnp|Lumsden|1994|p=122}}

'''Hercules 105''' – {{cvt|1675|hp|kW}}, developed from the Hercules 101 with modified supercharger gears.{{sfnp|Lumsden|1994|p=122}}

'''Hercules 106''' – {{cvt|1675|hp|kW}}, developed from the Hercules 101. The '''Hercules 107''' was the torquemeter version.{{sfnp|Lumsden|1994|p=122}}

'''Hercules 120''' – {{cvt|1715|hp|kW}}, high-altitude development of the Hercules 101. The '''Hercules 121''' was the torquemeter version. The '''Hercules 200''' was further modified version of the Hercules 120.{{sfnp|Lumsden|1994|p=122}}

'''Hercules 130''' – {{cvt|1715|hp|kW}}, development of the Hercules 100. The '''Hercules 134''' was a development with modified mounting ring and exhaust pipes for a rear manifold.{{sfnp|Lumsden|1994|p=122}}

'''Hercules 216''' – {{cvt|1675|hp|kW}}, development of the Hercules 106 with the Hercules 230 power section and single speed supercharger. Applications:{{sfnp|Lumsden|1994|p=122}}

'''Hercules 230''' – {{cvt|1925|hp|kW}}, development of the Hercules 130 with the re-designed power section and modified mounting ring and exhaust pipes for a rear manifold. The '''Hercules 270''' was a development. The '''Hercules 231''' and '''Hercules 271''' were the torquemeter versions.{{sfnp|Lumsden|1994|pp=122-123}}

'''Hercules 232''' – modified development of the Hercules 230 for improved performance. The '''Hercules 233''' was the torquemeter version.{{sfnp|Lumsden|1994|p=122}}

'''Hercules 234''' – modified development of the Hercules 232. The '''Hercules 235''' was the torquemeter version. The '''Hercules 238''' was a military version of the Hercules 734 which itself was based on the Hercules 234.{{sfnp|Lumsden|1994|p=122}}

'''Hercules 260''' – modified development of the Hercules 230 to suit [[reversible propeller]]s. The '''Hercules 261''' was the torquemeter version.{{sfnp|Lumsden|1994|p=123}}

'''Hercules 264''' – {{cvt|1950|hp|kW}}, a development of the Hercules 260. The '''Hercules 265''' was the torquemeter version.{{sfnp|Lumsden|1994|p=123}}

'''Hercules 268''' – a further development of the Hercules 260. The '''Hercules 269''' was the torquemeter version.{{sfnp|Lumsden|1994|p=123}}

'''Hercules 630''' – {{cvt|1675|hp|kW}}, a civil development of the Hercules 100. The '''Hercules 631''' was the torquemeter version.{{sfnp|Lumsden|1994|p=123}}

'''Hercules 632''' – {{cvt|1690|hp|kW}}, a civil-series engine developed from the Hercules 630. The '''Hercules 633''' was the torquemeter version. The '''Hercules 638''' and '''Hercules 672''', along with their torquemeter versions the '''Hercules 639''' and '''Hercules 673''' were developments of the Hercules 632.{{sfnp|Lumsden|1994|pp=123–124}}

'''Hercules 634''' – {{cvt|1690|hp|kW}}, a civil-series engine developed from the Hercules 630 with modified mounting ring and exhaust pipes for a rear manifold. The '''Hercules 635''' was the torquemeter version.{{sfnp|Lumsden|1994|p=123}}

'''Hercules 636''' – a civil-series engine developed from the Hercules 630 with modified mounting ring and exhaust pipes for a rear manifold. The '''Hercules 637''' was the torquemeter version. The '''Hercules 637-2''' and '''Hercules 637-3''' were further torquemeter developments.{{sfnp|Lumsden|1994|p=123}}

'''Hercules 730''' – {{cvt|2040|hp|kW}}, a civil-series engine developed from the Hercules 230 and 630 with improved power section, the '''Hercules 731''' was the torquemeter version.{{sfnp|Lumsden|1994|p=124}}

'''Hercules 732''' – a civil-series engine developed from the Hercules 730 with modified mounting ring and exhaust pipes for a rear manifold. The '''Hercules 733''' was the torquemeter version.{{sfnp|Lumsden|1994|p=124}}

'''Hercules 734''' – {{cvt|1980|hp|kW}}, a civil-series engine developed from the Hercules 730. The '''Hercules 735''' was the torquemeter version. The '''Hercules 238''' was a military version of the civil Hercules 734.{{sfnp|Lumsden|1994|pp=123–124}}

'''Hercules 736''' – {{cvt|2040|hp|kW}}, a civil-series engine developed from the Hercules 730. The '''Hercules 737''' was the torquemeter version.{{sfnp|Lumsden|1994|p=124}}

'''Hercules 738''' – a civil-series engine developed from the Hercules 730.{{sfnp|Lumsden|1994|p=124}}

'''Hercules 739''' – the torquemeter version of the Hercules 738.{{sfnp|Lumsden|1994|p=124}}

'''Hercules 750''' – a civil-series engine developed from the Hercules 730 to suit braking propellers. The '''Hercules 751''' was the torquemeter version.{{sfnp|Lumsden|1994|p=124}}

'''Hercules 758''' – {{cvt|2080|hp|kW}}, a civil-series development of the Hercules 750, the '''Hercules 759''' was the torquemeter version. The '''Hercules 790''' and its torquemeter version the '''Hercules 790''' were further developed from the Hercules 758.{{sfnp|Lumsden|1994|pp=124–125}}

'''Hercules 760''' – a civil-series engine developed from the Hercules 730.{{sfnp|Lumsden|1994|p=124}}

'''Hercules 762''' – {{cvt|2080|hp|kW}}, a civil-series high-altitude development of the Hercules 730 with modified supercharger. The '''Hercules 763''' was the torquemeter version.{{sfnp|Lumsden|1994|p=124}}

'''Hercules 772''' – {{cvt|1965|hp|kW}}, a civil-series development of the Hercules 762. The '''Hercules 773''' was the torquemeter version.{{sfnp|Lumsden|1994|p=125}}