
vii-twin enchin

vii-twin enchin, vii2 enchin ennum ariyappedunnu, silindarukal oru saadhaarana crank shaaft pankidukayum vii konfigareshanil krameekarikkukayum cheiyunna rund silindar pisttan enchinaanu.
motorcycleukalumaayi (transversley allengil longitudinally instaal cheytha) vyaapakamaayi bandhappettirikkunnavum, vii-twin enchinukal vyaavasaayika enchinukalkkum niravadhi cheria kaarukalkkum upayogichittundu. vii-twin design 1880 kalude avasaanathil nirmikkappettu.
uthbhavam.
aadyathe vii-twin enchinukalilonnu 1889 ll gottleab dimeler nirmmichu. ithu bottukalkkaayi oru nischala enchinaanennum diamlerinte randaamathe kaaraya dimeler staaltaadvaaganil (steel wheel kaar) upayogichuvennum addeham paranju. fraansil panhard ettu levasser licensinu keezhilaanu enchin nirmmichathu.
1902 novemberil yunaittad kingdatthile prinsps ottokaar kambaniyaanu aadyakaala vii-twin enchinil nirmmicha motorcycle nirmmichathu. adutha varsham, vii-twin motorcycleukal yunaittad kingdatthile eclipse motor & saikkil kambani ("exl-ool" model), yunaittad stetsile glen curtis, germmaniyile ensu motorenwerk ennivar nirmmichu.
aadyathe kaarukalil panhard-biltt dimeler vii-twins upayogichirunna pyusho, irupathaam noottaandinte thudakkathil svanthamaayi vii-twin enchinukal nirmmikkaan thudangi. 1907-ll aadyathe ail oof maan tii. tii. rays nediya oru norttan motorcyclilaanu eee pyusho enchin pravarthichathu.
saadhaarana design.
crank shaaft konfigareshan.
mikka vii-twin enchinukalkkum orotta crankpin undu, ithu bandhippikkunna rund vadikalum pankidunnu. connecting vadi offset silindarukalumaayi arikil irikkaam, allengil fork blade bandhippikkunna vadi undayirikkaam, ithu offset silindarukal ullathinaal undaakunna valayal shakthikale ozhivaakkunnu.
1935 moto guzi 500 sisi upayogicha 180° crank pinn offset, 1983 honda shado 750 upayogicha duval crankpin konfigareshan, 1987 suzuki vx 800 upayogicha 75° crank pinn offset (amerikkayil 45° offset) enniva chila sradheyamaaya ozhivakkalukalil ulppedunnu.
vii angle.
poojyathinum 180 degrick edayilulla eathenkilum 'vii angle' (silindarukalude rund theerangal thammilulla angle) oru vii-twin enchinu saidhaanthikamaayi saadhyamaanengilum, praayogikamaayi 40 digriyil thaazheyulla konukal apoorvamaayi maathrame upayogikkaarulloo. mikka dukaattisukalum, mikka moto gussikalum, honda aarsi 51, suzuki tl 1000, tl 1000 aarr enniva pole oru thikanja praadhamika balance (sariyaaya kaundar veytt upayogikkukayaanenkil) nedaan kazhiyunna 90 digriyaanu vii-twin enchininte ettavum saadhaaranamaaya vii angle. ennirunnaalum, eee krameekaranam asamamaya firing oordaril kalaashikkunnu, randaamathe silindar aadya silindarinu sesham 270 digri fayar cheiyunnu, thudarnnu aadya silindar veendum fayar cheiyunnathuvare 450 digri edavela. 90 digri enchinukale chilappol vii-twinninekkaal ell-twin (tl1000aarilo tl1000kaliloo ulla "ell" pole) ennu vilikkunnu.
vedivayppukal thammilulla marimari dairkhyameriyathum cheruthumaaya vidavukal oru savisheshamaaya vii-twin alternating enchin shabdam "footfoot footfoot footfoot" srishtikkunnu." 
90 digriyil thaazheyulla oru vii angle upayogikkumbol, offset kraankpinukal upayogikkukayaanenkil maathrame thikanja praadhamika balance nedaan kazhiyoo. illengil, vibration kuraykkunnathinu saadhaaranayaayi balance shafttukal aavasyamaanu. 90 digriyil thaazheyulla konukalulla enchinukal upayogikkunna vahanangalil iva ulppedunnu
90 digriyil kooduthal konukalulla enchinukal upayogikkunna vahanangalil 1934 moto guzi 500 sisi (120 digri), 1940-1948 sundap ks 750 (170 digri) enniva ulppedunnu.
motor cycleukal.
mattu motor vahanangal anusarichu, frameumaayi thaarathamyappeduthumbol crankshaft ooriyanteshane soochippikkaan longityoodinal enchin, transwers enchin ennee padangal palappozhum upayogikkunnu. ennirunnaalum, chila kambanikal vipareeta padaprayogam upayogikkunnu, oru "transwers" vii-twin enchinil motorcyclinte iruvashathum silindarukal gadippichittundennum (athinaal crankshaft framinu anusrithamaayi pravartthikkunnu) oru "longityoodinal" vii-twin enchininu munnilum pinnilum silindarukal undennum prasthaavikkunnu. itaaliyan nirmmathaavaaya moto guzi aanu randaamathe padavali upayogikkunnathu.
atharam avyakthatha ozhivakkaan, chila aalukal "transwers crank shaaft enchin", "longityoodinal crank shaaft enchin" allengil "transwers moundu cheytha silindarukal" ennivayude vivaranagal upayogikkunnu.
transwers enchin.
framilake transwers aayi crunkshaft upayogichu enchin gadippikkuka ennathaanu ettavum saadhaaranamaaya krameekaranam. eee moundinginte prayojanam motorcyclinte veethi oru longitudinally-moundu cheytha vii-twinninekkaal cheruthayirikkaam ennathaanu. eyar-cooled enchinukalkkulla eee konfigareshante oru poraayma, rund silindarukalkkum vyathyastha vaayupravaahangal labikkukayum pinn silindarinte thanuppikkal niyanthrikkappedukayum cheiyunnu ennathaanu (asamamaya thanuppikkal oru samanthara-eratta enchin pole ucharikkappedunnille, silindarukalude aantharika mukhangal vaayupravaahathin vidheyamaakunnilla). chila transwers vii-twins rund silindarukalkkum bhakshanam nalkaan vii-aamgilinte madhyathil orotta carburator upayogikkunnu. ithu rund kaarbyoorettarukalude aavasyakatha ozhivaakkumbol, silindarinte pinbhaagathu hoott exhost porttum paipum sthaapikkunnathiloode pinn silindarinu kooduthal thanuppikkal prasnangal srishtikkunnu, avide kuranja thanuppikkal vaayupravaahathin vidheyamaayekkaam.
transwers vii-twin enchinukal harley-davidson, ducati, suzuki esvi650 polulla niravadhi sameepakaala japanese motorcycleukal enniva upayogichittundu. muun silindar lambavum pinn silindar thirascheenavumaayathinaal chila ducati vii-twin enchinukal "ell-twin" enchinukalaayi vipananam cheythittundu, angane "ell" aakruthi roopappedunnu.
rekhamsha enchin.
enchin deerghadooramaayi gadippikkuka ennathaanu saadhaarana krameekaranam. eee krameekaranatthinte oru nettam rund silindar headukalkkum eyar streamilake neengaan kazhiyum ennathaanu, athinaal avaykku oronninum ore alavil thanuppikkal labikkum (eyar-cooled enchinukalkku). koodaathe, enchinte pinnil sthithicheyyunna transmission oru saadhaarana motorcycle framil gadippikkaan eluppamaanu, koodaathe shaaft drive motorcycleukalkku, driveshaftinte thudakkathil 90 digri bevel gear aavasyamilla.
ellah rekhamsha enchinukalum anusarichu, tork prathikaranam munvashatheyum pinchakrangaludeyum bhaara santhulithaavastha mattunnathinupakaram motorcycline oru vashathekku (moorchayulla aaksilareshan/disilaration allengil neutralil throttil thurakkumbol) valaykkum ennathaanu oru poraayma. ennirunnaalum, pala aadhunika motorcycleukalum kraankshaafttinte vipareeta dishayil flyveelukaloo aaltarnettarukalo karakkunnathiloode eee prabhavam kuraykkunnu.
honda cx seerees niravadhi moto guzi motorcycleukalum longityoodinal vii-twin enchinukal upayogichittundu.
kaarukal.
mikka kaarukalum moonno athiladhikamo silindarukalulla enchinukalilaanu pravartthikkunnathu, ennirunnaalum vii-twin enchinukalulla niravadhi cheria kaarukal nirmmichittundu, prathyekichum 1912 muthal 1920 vareyulla kaalayalavil niravadhi kambanikal saikkil kaarukal nirmmichirunnu (anukoolamaaya nikuthi sahacharyam kaaranam). eee udamasthaavakaasha enchinukalellaam onnukil side kaar varkkinayi upayogikkunna valia motorcycle enchinukal (valia singles allengil vii-twins) allengil jaa prestwich vyavasaayangal ('jeey.eiii.pii.'enchinukal) allengil eph.iii. baker limittad ('presition' enchinukal).
1912ll humber 998 sisi vii-twin side-valve enchinaanu humber nirmmichathu. enchinu nerittu gadippicha clutch, 3-speed gearbox, pinn differentialilekku prop shaaft outtputtu ennivayundaayirunnu. 1914ll eee enchininte oru vaattar cooled pathipp labhyamaakkiyenkilum 1915ll onnaam lokamahaayudham humberet uthppaadanam avasaanippichu.
<aii. dii. 1> muthal, vividha morgan three wheeler three wheeler saikkil kaar modalukalkk vii-twin enchinukalaanu karuth pakarunnath. 2012-ll nilavil vanna morgan three veelarumaayi three wheeler modalukalude uthpaadanam punaraarambhichu. yunaittad kingdatthilum, birmingham small ams kambani (bsa) avarude vii-twin motorcycle enchinukal upayogichu pravartthikkunna niravadhi kaarukal nirmmichu. iva nirmmichathu 1921-1926 (naalu chakra modalukal), 1929-1936 (moonnu chakrangalum naalu chakra modalukalum) ennivayil ninnaan.
1978-leeii nilavilulla triking saikkil kaar (moto guzi enchin upayogichu), 2006-leeii nilavilulla easu saikkil kaar (harley-davidson enchin upayogichu), 1990-leeii nilavilulla jeser trikes kitt kaar (niravadhi nirmmaathaakkalil ninnulla enchinukal upayogichu) thudangi niravadhi nirmmathaakkal yadhaartha morgan three wheel kaaril ninnu prachodanam ulkkond modalukal nirmmichittundu.
masdayude aadyathe kaaraya 1960-1966 masda r360 rear enchin qee kaarinu nalkiyathu masda vii-twin enchinaanu. 1961-1962 masda b360 frond enchin laitt komezhsyal vahanam eee enchinte oru pathippaanu upayogichathu.
vyaavasaayika enchinukal.
presher vaasharukal, pultthakidi, garden tractorukal, tillarukal, janarettarukal, vaattar pambukal thudangiya vyaavasaayika upayogangalkkayi vividha vii-twin enchinukal nirmmichittundu. enchinukal saadhaaranayaayi 90° vii konilaanu eyar-kool cheiyunnathu. prayogatthe aashrayich, enchinte ooriyanteshan thirashcheenamo lambamo aaya crankshaft aakam.
vaanijyaparamaaya vii-twin enchinukalude nirmmaathaakkalil briggs & straattan athinte vangard, professional, intech vii-twin seerees, honda athinte vii-twin seerees enchinukal, kavasakki athinte efdi, efh, efr, efs, efx seerees, subaru athinte eh seerees, tekamse athinte ovi691iii, tvt691 enchinukal, kohler enniva ulppedunnu.