| 词条 | Sunbeam Nubian | |||||||||||||||
| 释义 |
The Sunbeam Nubian, also called the Sunbeam 155 hp, was a British 8-cylinder aero-engine that was first run in 1916.[1] Design and developmentIn March 1916 Louis Coatalen, the chief designer at Sunbeam, responded to the Admiralty's request for more powerful engines by designing the V-8 Nubian. The Nubian featured the twin overhead camshafts and four valves of his prewar engines for Grand Prix and TT racing cars. With a bore of {{convert|95|mm|in|0|abbr=on}} and stroke of {{convert|135|mm|in|0|abbr=on}} the Nubian displaced {{convert|7.685|l|cuin|0|abbr=on}} and was rated at {{convert|155|hp|kW|0|abbr=on}} with a reduction gear ratio of 0.615:1.[1] The original engine was built with a 60 degree angle between cylinder banks but severe vibration problems forced Coatalen to redesign it with a 90 degree angle, emerging as the Nubian II. Intended to power the Supermarine AD Flying Boat the teething troubles of the Nubian forced Supermarine to use a {{convert|150|hp|kW|0|abbr=on}} Hispano-Suiza V-8 engine instead.[1] Deliveries of the Nubian II began in October 1917, by which time the Nubian was overshadowed by the more powerful V-8s from Hispano-Suiza and the {{convert|200|hp|kW|0|abbr=on}} Sunbeam Arab. The only aircraft known to have been powered by a Nubian was the Saunders T.1, but some of the 36 engines built, of 50 ordered, are believed to have been supplied to the Imperial Russian Air Service.[1] The Nubian suffered from a poor design decision at first and was overtaken by events which prevented widespread use, but its cousin, the V-12 Sunbeam Afridi and its family members found greater success.[1] Variants
The initial V-8 engine with 60 degree V and rated at {{convert|155|hp|kW|0|abbr=on}}.
Redesigned with 90 degree cylinder angle to alleviate severe vibration problems, the Nubian II was late in delivery and was not widely used. Applications
Specifications (Nubian II){{pistonspecs||ref=Sunbeam Aero-Engines[1] |type=V-8 90 degree V, water-cooled piston engine |bore={{convert|95|mm|in|0|abbr=on}} |stroke={{convert|135|mm|in|0|abbr=on}} |displacement={{convert|7.685|l|cuin|0|abbr=on}} |length={{convert|1,052|mm|in|0|abbr=on}} |diameter= |width= |height={{convert|765|mm|in|0|abbr=on}} |weight={{convert|310|kg|lb|0|abbr=on}} |valvetrain=Twin direct overhead camshaft, two exhaust and two inlet valves per cylinder |supercharger= |turbocharger= |fuelsystem=gravity fed |fueltype=Gasoline |oilsystem=Dry sump, pressure fed |coolingsystem=Water-cooled by radiator |power={{convert|115.6|kW|hp|0|abbr=on}} |specpower= |compression= |fuelcon= |specfuelcon= |oilcon= |power/weight= |designer=Louis Coatalen |reduction_gear=0.615:1 |general_other= |components_other= |performance_other= }} See also{{aircontent|see also= |related= |similar aircraft= |lists=
|similar engines=
}} References1. ^1 2 3 4 5 6 7 8 9 10 11 {{cite book|last=Brew|first=Alec|title=Sunbeam Aero-engines|publisher=Airlife Publishing|location=Shrewsbury|year=1998|isbn=1-84037-023-8}} 2. ^{{cite book|last=Jackson|first=A.J.|title=Blackburn Aircraft since 1909|publisher= Naval Institute Press|location=London|edition=1st|pages=106–109|isbn=0-87021-024-6}} Bibliography
External links
2 : Sunbeam aircraft engines|Aircraft piston engines 1910–1919 |
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