飞行原理词汇-flight principles vocabulary.pdfVIP

FlightPrinciplesVocabulary专英二-producedby:WilliamJamesII

Camber–Thecurvature(shape)oftheupperandlowerpartsofthewing,whichresultsin

differentdistancesaboveandbelowthewing,causingadifferenceinairpressureastheair

movesoverit.

Centrifugalforce–Anoutwardforcethatopposescentripetalforce,resultingfromtheeffectof

inertiaduringaturn.

Chordline–Animaginarystraightlinedrawnthroughanairfoilfromtheleadingedgetothe

trailingedge,andisthepointfromwhichwemeasureAOA(AngleofAttack).

Controllability–Howwelltheplanerespondstopilotinput.

Drag–Arearwardforce,whichopposesthrust,causedbyairflowoverthefuselageandother

protrudingparts.

Dynamicstability–Thelong-termmovementoftheaircraftafterbeingdisturbedfrom

equilibrium.

Formdrag–Dragcausedbytheoverallsizeandshapeoftheairplane,amountoffrontalarea,

andhowwellstreamlinedtheaircraftis.

Groundeffect–Astheaircraftgetswithinonewingspanoftheground,thedownwashand

wingtipvorticesgetcompressedbytheground,resultinginanincreaseinlift.

Induceddrag–Dragwhichisproducedbecauseliftisproduced.

Interferencedrag–Dragcausedbyamixingofairflowattherearoftheairplane,comingoff

differentpartsoftheairplane.

Lift–Anupwardforce,whichopposesweight,causedbyairflowoverthesurfaceofthewings.

Loadfactor–Theratioofaspecifiedloadtothetotalweightoftheaircraft.Forexample,ifan

airplaneweighs2,000lbs.instraightandlevelflight,andmakesa60°turn,itwillhaveaload

factorof2,meaningthattheweightthewingsmustsupportisnow4,000lbs.

Negativedynamicstability–Theairplanewillnotreturntobalance(equilibrium),withoutpilot

input,overalongperiodoftime.Instead,itwillcontinuetomovefartherandfartherawayfrom

equilibrium.

Neutraldynamicstability–Theairplanewillnotreturn