Obturator ring

For other uses, see Obturator.
Obturator ring being removed from a 100 hp Gnome Monosoupape rotary engine

An obturator ring was a type of piston ring used in the early rotary engines of some World War I fighter aircraft for improved sealing in the presence of cylinder distortion.

Purpose

The cylinders of rotary aircraft engines (engines with the crankshaft fixed to the airframe and rotating cylinders) suffered from uneven cylinder cooling as the side facing the direction of rotation received more cooling air which lead to thermal distortion. To keep weight down the cylinders on rotary engines had very thin-walls (1.5 mm)[1] and some had no cylinder liners. On engine types without cylinder liners, obturator rings, made of bronze in the early Gnome engines,[2] were fitted as these were soft enough to not damage cylinder walls and could flex to the shape of the cylinder.

In operation wear on the rings was considerable. Engines needed to be overhauled about every 20 hours.[1] The reliability of Gnome engines license-built by The British Gnome and Le Rhone Engine Co. was improved with an overhaul life of about 80 hours being achieved, mainly as a result using a special tool to roll the 'L' section obturator rings.[3] Clerget rotary aircraft engines also used obturator rings which were prone to overheating and seizure.[4]

Le Rhône and Bentley BR1/BR2 rotary engines used cylinder liners and were sealed using conventional piston rings rather than obturator rings.[5][6]

See also

References

  1. ^ a b The Rotary Aero Engine, Andrew Nahum 1987, ISBN 1 900747 12 X, p.40
  2. ^ Aviation Engine Examiner, Major Victor W. Page, The Norman W. Henley Publishing Co., 2 West 45th Street, New York 1931, p.146
  3. ^ I Kept No Diary, Air Commodore F.R. Banks 1978, ISBN 0 9504543 9 7, p.63
  4. ^ Bentley, Walter Owen (1969). "5 - Aero Engines". My life and my cars. A S Barnes. ISBN 978-0498073427.
  5. ^ "Chapter II - The 80 and 110 Horsepower LeRhone Motor". Rotary Engines. United States: The War Department. 1919.
  6. ^ Lumsden, Alec (2002). British Piston Engines and their Aircraft. Airlife Publishing. p. 88. ISBN 1853102946.

An 'L' section obturator ring is shown in Patent US 1378109A - "Obturator ring".

Read other articles:

Jabal al-Lawz

Jabal al-Lawzجَبَل ٱللَّوْز (dalam bahasa Arab)Jabal al-LawzLokasi di Arab SaudiTitik tertinggiKetinggian2.580 m (8.460 ft)[1]Puncak1.622 m (5.322 ft)[1]Masuk dalam daftarUltraKoordinat28°39′15″N 35°18′21″E / 28.65417°N 35.30583°E / 28.65417; 35.30583Koordinat: 28°39′15″N 35°18′21″E / 28.65417°N 35.30583°E / 28.65417; 35.30583 [1]PenamaanNama terjema...

 

 

Johnny Pimentel

Nama ini menggunakan kebiasaan penamaan Filipina; nama tengah atau nama keluarga pihak ibunya adalah Ty dan marga atau nama keluarga pihak ayahnya adalah Pimentel. Johnny T. Pimentel Wakil Ketua Dewan PerwakilanMasa jabatan22 Juli 2019 – 7 Desember 2020Ketua DPRAlan Peter CayetanoLord Allan VelascoAnggota DPR dari Dapil II Surigao del SurPetahanaMulai menjabat 30 Juni 2016 PendahuluFlorencio C. GarayPenggantiPetahanaGubernur Surigao del SurMasa jabatan30 Juni 2010 –...

 

 

Les Cayes

Commune in Sud, HaitiLes Cayes Okay (Haitian Creole)Aux CayesCommuneLes Cayes CathedralLes CayesLocation in HaitiCoordinates: 18°12′0″N 73°45′0″W / 18.20000°N 73.75000°W / 18.20000; -73.75000CountryHaitiDepartmentSudArrondissementLes CayesPopulation (2015) • Total86,780Time zoneUTC-5 (Eastern) • Summer (DST)UTC-4 (Eastern) Les Cayes (/leɪ ˈkeɪ, leɪ ˈkaɪ/ lay K(A)Y, French: [le kaj]), often referred to as Aux ...

The Magnificent (song)

1995 song by the One World OrchestraThe MagnificentSong by the One World Orchestra featuring the Massed Pipes and Drums of the Children's Free Revolutionary Volunteer Guardfrom the album The Help Album Released9 September 1995 (UK)Recorded4 September 1995GenreDrum and bassLength2:12LabelGo! Discs RecordsSongwriter(s)Bill Drummond, Jimmy Cauty and Elmer BernsteinProducer(s)Drummond/Cauty The Magnificent is a 1995 song by the One World Orchestra (Bill Drummond and Jimmy Cauty, better known as T...

 

 

Patrick F. Gill

American politician For other people called Patrick Gill, see Patrick Gill. Patrick F. GillMember of the U.S. House of Representativesfrom Missouri's 11th districtIn officeMarch 4, 1909 – March 3, 1911Preceded byHenry S. CaulfieldSucceeded byTheron E. CatlinIn officeAugust 12, 1912 – March 3, 1913Preceded byTheron E. CatlinSucceeded byWilliam L. Igoe Personal detailsBornAugust 16, 1868Independence, Missouri, United StatesDiedMay 21, 1923 (aged 54)St. Louis, Missouri, United St...

 

 

Keuskupan Sanggau

Keuskupan SanggauDioecesis SanggauensisKatolik LokasiNegaraIndonesiaWilayahKabupaten Sanggau dan Sekadau, Kalimantan BaratProvinsi gerejawiPontianakDekanatSanto PetrusSanto Thomas AquinasSanto Fransiskus AsisiSalib Suci (Sekadau)Kantor pusatJl. Jenderal Sudirman No. 43, Kel. Ilir Kota, Kec. Kapuas, Kab. Sanggau 78513Koordinat0°07′10″N 110°35′19″E / 0.119333°N 110.588492°E / 0.119333; 110.588492StatistikLuas18.392 km2 (7.101 sq mi)[1&...

Pilsner

Pilsner Krombacher. Pilsner atau pilsener adalah sejenis bir lager yang berwarna pucat.[1] Pilsner dibuat dari jelai yang direndam air, hop, ragi, dan air.[2] Minuman ini pertama kali dibuat di Plzen, Ceko pada 1842.[2] Nama pilsner pada awalnya merupakan nama tempat pembuatan bir ini pertama kali dibuat.[2] Pilsner ketika itu dibuat dengan menggunakan jelai yang direndam sebagian dan buka jelai yang dipanggang seperti yang kebanyakan digunakan oleh pabrik bir ...

 

 

Woman's Hour

BBC radio magazine programme for women, broadcast on Radio 4 in the United Kingdom. This article's lead section may be too short to adequately summarize the key points. Please consider expanding the lead to provide an accessible overview of all important aspects of the article. (July 2022) Woman's HourGenreNews magazine focusing on women's issuesRunning time60 minutes (10:00 am – 11:00 am)Country of originUnited KingdomLanguage(s)EnglishHome stationBBC Light Programme (1946–1967)BBC R...

 

 

Dimas Danang

Biografi ini tidak memiliki referensi atau sumber sehingga isinya tidak dapat dipastikan. Bantu memperbaiki artikel ini dengan menambahkan sumber tepercaya. Materi kontroversial atau trivial yang sumbernya tidak memadai atau tidak bisa dipercaya harus segera dihapus.Cari sumber: Dimas Danang – berita · surat kabar · buku · cendekiawan · JSTOR (Pelajari cara dan kapan saatnya untuk menghapus pesan templat ini) Dimas DanangLahirDimas Danang Suryonegoro18...

Urticaceae

Family of flowering plants Nettle family Urtica dioica (stinging nettle) Scientific classification Kingdom: Plantae Clade: Tracheophytes Clade: Angiosperms Clade: Eudicots Clade: Rosids Order: Rosales Family: UrticaceaeJuss., 1789 Synonyms Cecropiaceae C.C.Berg[1] The Urticaceae /ɜːrtɪˈkeɪsiː/ are a family, the nettle family, of flowering plants. The family name comes from the genus Urtica. The Urticaceae include a number of well-known and useful plants, including nettles in the...

 

 

Michiel Coxie

Flemish painter and designer (1499–1592) Self-portrait as Saint George Michiel Coxie the Elder, Michiel Coxcie the Elder or Michiel van Coxcie, Latinised name Coxius[1][2] (1499 – 3 March 1592), was a Flemish painter of altarpieces and portraits, a draughtsman and a designer of stained-glass windows, tapestries and prints. He worked for patrons in the principal cities of Flanders. He became the court painter to successively Emperor Charles V and King Philip II of Spain. ...

 

 

Percy (Manche)

Pour les articles homonymes, voir Percy. Percy L'église Saint-Jean-Baptiste. Administration Pays France Région Normandie Département Manche Arrondissement Saint-Lô Commune Percy-en-Normandie Intercommunalité Villedieu Intercom Statut commune déléguée Maire délégué Mandat Brigitte Desdevises 2022-2026 Code postal 50410 Code commune 50393 Démographie Gentilé Percyais Population 2 300 hab. (2020) Densité 62 hab./km2 Géographie Coordonnées 48° 55′ 01�...

Paolo Andreucci

Italian rally driver (born 1965) Paolo AndreucciPaolo Andreucci driving a Fiat Punto at the Rally Targa Florio in 2006.Born (1965-04-21) 21 April 1965 (age 59)Corneliano d'Alba, ItalyWorld Rally Championship recordActive years1989, 1993–1994, 1996–2001, 2004, 2015Co-driver Carlo Cassina Paolo Amati Simona Fedeli Giovanni Bernacchini Alessandro Giusti Anna AndreussiTeamsJolly Club, FordRallies12Championships0Rally wins0Podiums0Stage wins1Total points7First rally1989 Rally de PortugalL...

 

 

قائمة أطول الجبال في المجموعة الشمسية

جبل أوليمبوس على كوكب المريخ، أطول جبل على كواكب المجموعة الشمسية، مقارنة بجبل إفرست وماونا كيا على الأرض (المرتفعات الظاهرة أعلى مستوى سطح البحر، والتي تختلف عن ارتفاعات «القاعدة إلى الذروة» الواردة أدناه) هذه قائمة بأطول الجبال في المجموعة الشمسية، أي أعلى قمة على كواك�...

 

 

Kabupaten Manggarai Barat

Untuk kegunaan lain, lihat Manggarai. Kabupaten Manggarai BaratKabupatenPulau Padar, Taman Nasional Pulau Komodo LambangPetaKabupaten Manggarai BaratPetaTampilkan peta Kepulauan Sunda KecilKabupaten Manggarai BaratKabupaten Manggarai Barat (Indonesia)Tampilkan peta IndonesiaKoordinat: 8°38′41″S 119°52′58″E / 8.64484°S 119.88281°E / -8.64484; 119.88281Negara IndonesiaProvinsiNusa Tenggara TimurIbu kotaLabuan BajoJumlah satuan pemerintahan Daftar Kecamat...

Comanche language

Uto-Aztecan language spoken by the Comanche people in the United States ComancheNʉmʉ Tekwapʉ̲Pronunciation[ˈnɨmɨ ˈtekʷapɨ̥]Native toUnited StatesRegionOklahoma (formerly, Texas, New Mexico, Kansas, Colorado, Oklahoma)EthnicityComancheNative speakers<9 (2022)[1]Language familyUto-Aztecan NumicCentral NumicComancheLanguage codesISO 639-3comGlottologcoma1245ELPComancheLinguasphere65-AAB-bhFormer distribution of the Comanche language.Comanche is classified as Sever...

 

 

Cantonese people

Han Chinese ethnic subgroup native to parts of Southern China Ethnic group Cantonese廣府人 / 广府人Cantonese noblewoman and servants, c. 1900sTotal populationc. 66 million (estimated number of Yue speakers)[1]Regions with significant populationsChina (Guangdong, Guangxi, Hainan, Hong Kong and Macau)Southeast Asia (Malaysia, Vietnam, Cambodia, Thailand, Laos, Singapore, Indonesia, Myanmar and Philippines)Other countries (including United States, Canada, Mexico, Peru, United...

 

 

Liverpool F.C. in international football

English club in international football Liverpool F.C. in international footballThe European Champion Clubs' Cup trophy won by Liverpool for a fifth time in 2005ClubLiverpool F.C.Seasons played49Most appearancesJamie Carragher (150)Top scorerMohamed Salah (47)First entry1964–65 European CupLatest entry2024–25 UEFA Champions LeagueTitlesChampions League 6 197719781981198420052019 Europa League 3 197319762001 Super Cup 4 1977200120052019 FIFA Club World Cup 1 2019 Liverpool Football Club is ...

Charis (butterfly)

Genus of butterflies Charis Anius metalmark (C.anius)male Antioquia, Colombia Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Arthropoda Class: Insecta Order: Lepidoptera Family: Riodinidae Tribe: Riodinini Genus: CharisHübner, 1819[1] Synonyms[2] Charmona Stichel, 1910 Charmonana Hemming, 1967 Charmonona Strand, 1932 Sarota Westwood, 1851 Charis is a genus of the Riodinini tribe of metalmark butterflies (family Riodinidae). Nineteen species have been id...

 

 

Eisenstadt

For other uses, see Eisenstadt (disambiguation). Statutory city in Burgenland, AustriaEisenstadtStatutory city Clockwise from top: aerial view of the city, state government building, Schloss Esterházy, calvary with Bergkirche FlagCoat of armsEisenstadtLocation within BurgenlandShow map of BurgenlandEisenstadtLocation within AustriaShow map of AustriaCoordinates: 47°51′N 16°31′E / 47.850°N 16.517°E / 47.850; 16.517Country AustriaStateBurgenlandDistrictStat...