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1、THEAEROPLANESPEAKSTHEAEROPLANESPEAKSBYH.BARBER(CAPTAIN,ROYALFLYINGCORPS)1THEAEROPLANESPEAKSMOTIVEThereasonsimpellingmetowritethisbook,themaideneffortofmypen,are,firstly,astrongdesiretohelptheordinarymantounderstandtheAeroplaneandthejoysandtroublesofitsPilot;and,secondly,topr
2、oducesomethingofPRACTICALassistancetothePilotandhisinvaluableassistanttheRigger.Havinghadsomeeightyears'experienceindesigning,building,andflyingaeroplanes,IhavehopesthatthepracticalknowledgeIhavegainedmayoffsetthedisadvantageofahandmoreusedtomanagingthe``joy-stick''thanthedr
3、eadfulhaltings,themanyside-slips,theirregularspeed,and,inshort,thealtogetherdisconcertingwaysofapen.ThemattercontainedinthePrologueappearedintheFieldofMay6th,13th,20th,and27th,1916,andisnowreprintedbythekindpermissionoftheeditor,SirTheodoreCook.Ihavemuchpleasureinalsoacknowl
4、edgingthekindnessofMr.C.G.Grey,editoroftheAeroplane,towhomIamindebtedforthevaluableillustrationsreproducedattheendofthisbook.2THEAEROPLANESPEAKSPROLOGUEPARTITHEELEMENTARYPRINCIPLESAIRTHEIRGRIEVANCESTheLectureHallattheRoyalFlyingCorpsSchoolforOfficerswasdeserted.Thepupilshadd
5、ispersed,andtheOfficerInstructor,morefaggedthananypupil,wasoutontheaerodromewatchingthetestofanewmachine.Deserted,didIsay?Butnotso.ThelecturethatdayhadbeenupontheElementaryPrinciplesofFlight,andtheylingeredyet.UpontheBlackboardwastheillustrationyouseeinthefrontispiece.``Iamt
6、hesideviewofaSurface,''itsaid,mimickingthetonesofthelecturer.``Flightissecuredbydrivingmethroughtheairatanangleinclinedtothedirectionofmotion.''``Quiteright,''saidtheAngle.``That'sme,andI'mthefamousAngleofIncidence.''``And,''continuedtheSurface,``myactionistodeflecttheairdow
7、nwards,andalso,byfleeingfromtheairbehind,tocreateasemi-vacuumorrarefiedareaovermostofthetopofmysurface.''``ThisiswhereIcomein,''athick,gruffvoicewasheard,andwenton:``I'mtheReaction.Youcan'thaveactionwithoutme.I'maveryconsiderableforce,andmydirectionisatright-anglestoyou,''an
8、dhelookedheavilyattheSurface.``Likethis,''saidhe,pickingupthechalkwithhisLi