飞机发展史演讲稿.docx

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1、WhatisanAirplane?Mostofusonlyhavetolookupintotheskytoseeanairplane,andmanyofushavetraveledbyairplanetoplacesthatwouldhavetakenmuchlongerbyanyothermeansoftranspoMation.Anairplanebydefinitionisanaircraftthathasafixedwingandispoweredbypropellersorjets.BeforetheWrightBrothers・HistoryofF

2、lightAswcallknow,thefirstairplanewasinventedbytheWrightBrothers・However,beforeit,therewerealsomanyearlyinventions,includingKites,Hotairballoons,Airships,GlidersPart1:HumanstrytoflylikebirdsEarlyHistoryofFlightAround400BC-FlightinChina•DynamicsofFlightThediscoveryofthekitethatcouldfl

3、yintheairbytheChinesestarted•Part1:HumansimitateBirdsinhumansthinkingaboutflying.KiteswereusedbytheChineseinreligiousRightceremonies・Theybuiltmanycolorfulkitesforfun,also.Moresophisticated•Part2：I9ihAnd20ihCeniuiykiteswereusedtotestweatherconditions・KiteshavebeenimportanttoFlightEff

4、ortstheinventionofflightastheyweretheforerunnertoballoonsandgliders・•Pnrt3：Thew「ightBrothersHumansTrytoFlylikeBirdsFormanycenturies,humanshavetriedtoflyjustlikethebirdsandhavestudiedtheflightofbirds.Wingsmadeoffeathersorlightweightwoodhavebeenattachedtoarmstotesttheirabilitytofly.Th

5、eresultswereoftendisastrousasthemusclesofthehumanarmsarenotlikeabirdsandcannotmovewiththestrengthofabird・s诫竹帕节研.HeroandtheAeolipileTheancientGreekengineer,HeroofAlexandria,workedwithairpressureandsteamtocreatesourcesofpower・Oneexperimentthathedevelopedwastheaeolipilewhichusedjetsofs

6、teamtocreaterotarymotion.Heromountedasphereontopofawaterkettle・Afirebelowthekettleturnedthewaterintosteam,andthegastraveledthroughpipestothesphere・TwoL-shapedtubesonoppositesidesofthesphereallowedthegastoescape,whichgaveathrusttothespherethatcausedittorotate.Theimportaneeoftheaeolip

7、ileisthatitmarksthestartofengineinvention-enginecreatedmovementwilllaterproveessentialinthehistoryofflight.1485LeonardodaVinci-TheOrnithopterandtheStudyofFlight.LeonardodaVincimadethefirstrealstudiesofflightinthe1480,s・Hehadover100drawingsthatillustratedhistheoriesonbirdandmechanica

8、lflight.Thedrawings