量子云播
剧情
Agusta109K2:AlpineMedivacRescueStraightUpsexplorationofverticalflightbeginswithahigh-impactalpinerescueamidanavalanche.ThedramaticopeningsequencedocumentsthedangerousworkoftheRegamountainrescueteamandtheinvaluableroleoftheAgustaA109K2helicopterinsavinglivesandminimizinginjuries.Asthecamerapansoverbeautifulvistasofthesnow-coveredSwissAlps,itcutstoacornice,asachunkofsnowbreaksfree,triggeringanavalanche.Thetranquilsceneisshatteredastheavalanchethundersdownthemountainslopes.Withterrifyingspeed,itheadsstraightforamotherandchildtrappedintheircar,wheelsspinningontheicyroad.Themothercallsforhelponhercellphone,andasecondcallfromasnowplowpromptsradiodispatch.TheRegamountainrescueteamalreadyisairborneenroutetothescene,theredcrosspaintedonthehelicopterswhiteunderbellysignalingthatmedicalhelpisontheway.Themotherescapes,buthersonismissing.Withinminutesofthehelicopterlanding,therescueteamdigoutthecar,extractthetrappedboy,applyfirstaid,andairlifthimandhismothertosafety.Asignificantmountainhazard,avalanchesareresponsibleformanydeathseachyear.Timeisoftheessenceinavalancherescuework.Apersonhasa90percentchanceofsurvivaliffoundwithinthefirst15minutes,butoneschancesofsurvivaldiminishwitheachpassingminute.Notonlydohelicoptersprovidequickaccessforrescueteams,theyalsoprovidealifelinetomedicalcare.Flyingtheinjuredtothenearesthospitalasrapidlyaspossibleisnottheonlytypeofrescueoperation;oftenhelicoptersbringthehospitaltotheinjured,whoreceivetreatmentatthescene.ThepowerfulavalanchewasshotinBritishColumbiasSelkirkMountainsunderthesupervisionoftheCanadianAvalancheAssociation.TheCAAcontrolsavalancheriskforthesafetyofheli-skiers.Tocapturetheavalanchehead-on,avalancheexpertandfilmmakerSteveKrochelandDavidDouglasdevelopedaquarter-inch-thicksteelcontainerfortheIMAXcamera,whichwasequippedwithatriggeringdeviceandabeepersothatthecameracouldbefoundoncetheavalanchehadsweptitdownthemountain.TherescuewascompletedinSwitzerlandsBerninaPassneartheItalianborder.FilmingtheRegarescuehelicopterair-to-airsequenceturnedintoaninternationalexcursionasDouglaschasedthesunlightoverItalyinonedirectionandinAustriainanotherbeforesettingdowninSwitzerland.Inanotherdramaticshot,Douglascenteredtheredcrossinthecrosshairsofthecameralensasthecraftdescended.Tofacilitatethisshot,DouglasdugaholeinthesnowlargeenoughtoaccommodatehimselfandtheIMAXcamera.Insidethehole,3feetbelowthehelicopter,hefilmeditstakeoff.AccordingtoDouglas,Thehelicopteristheinstrumentofrapidresponsetonaturalphysicalandsocialdisastersaroundtheworld,alleviatinghumansufferingonamajorscale.Fortheindividualcaughtbeyondthelimitsoftrainingorequipment,oftenthelastchanceforsurvivalisthehopethatahelicopterwillgettothemintime.ThePitcairnPCA2,MissChampionForcenturieshumansdreamedofflight.TheChinese,inthe12thcentury,developedatoyhelicoptermadefromapairofslatsmountedonastick,butseriouseffortshadtowaituntiltheearly20thcentury.Then,aftertheWrightbrothershistoricflightatKittyHawk,wedreamedofflightunfetteredbythelimitationsofrunwaysandairports.Yetbytheearly1930swewerestillatthedawnofthepracticalrotorcraft,whichpromisedtogiveformtohumanitysvision.Thetenyearperiodbetween1925and1935wasanexcitingtimeinaviationhistory,butfewaircraftsocaughtandheldthepublicsattention,astheAutogiro.Nicknamedtheflyingwindmill,thisstrange-lookingaircraftwasfirstsuccessfullyflownin1923bytheSpanishinventor,JuandelaCierva,whohadbeenworkingonthedevelopmentofsuchacraftsince1919.TheAutogirofascinatedtheair-mindedpublicbecauseofitsremarkableperformanceandhighdegreeofsafety,attractingsuchleadersofAmericanaviationasCharlesLindberghandAmeliaEarhart.JuandelaCiervasoldtheAmericanmanufacturingrightstoHaroldPitcairnin1928.PitcairnsAutogiroboastedamoremodernfuselagewithbetteraerodynamicqualities.Italsoprovidedprospectivebuyerswithachoiceofeithera300-or420-horsepowerengine.Inthefilm,HaroldPitcairnssonStephenfliesMissChampion,a1931model.ThisAutogiro,usedforpromotionbytheChampionSparkPlugCompany,iscontrolledlikeanairplane,butisliftedwithblades.Althoughtheoriginalrotorbladeshaveseen1,600hoursofflighttime,theyarestillairworthy.Witha330-horsepowerWrightR975-Eengine,theAutogirohasacruisingspeedof98mphandatopspeedof118mph.MissChampionledaNationalAirTourandmadethethen-risky300-mile-longflightfromMiamitoHavana,Cuba.(Untilthen,thelongestover-waterflightbyanAutogirohadbeen25milesinlength.)Later,MissChampionflewnonstopoveradistanceof500milestoChichenItzaintheYucatanrainforest.MissChampionwasretiredfromactiveservicein1932aftersettinganewaltituderecordforrotary-wingaircraft.Climbingtoaheightof21,500feetin1932,theAutogirosurpassedthepreviousrecordsetbyAmeliaEarhart.Today,theAutogiroisconsideredtobetheevolutionarymissinglinkfromwhichthepracticalhelicopterwasborn.FortyyearslaterStephenPitcairnbegantheformidabletaskofcollectingandrestoringexamplesofhisfathersaircraft.HetrackeddownMissChampionandinOctoberof1982beganthepainstakingtaskofrestoration,usingtheoriginalPitcairnfactorydrawings.Inthespringof1985MissChampionflewagain.TheBell47G:AFlyingLessonSincePitcairnsAutogiro,improvedcontrolsystemsallowtheairframetorisedirectlyfromthegroundwithapoweredrotor.StraightUp!putsyouinthepilotsseatofaBell47Gasthebasicelementsofhelicopteroperationaredemonstrated.TheBell47Gssingle-rotorconfigurationisbyfarthemostcommontypeusedtoday.Yourflyinglessonbegins.Asahelicopterpilot,thepilotusesallfourlimbstofly,allatthesametime!Withthelefthandholdingthecollectivepitchcontrollever,hepullsupeversoslightly,andwegostraightupintoaslow-motionhover.Thespinningrotorbladesactassmallwings,buttheyspinsofastthattheycreateonecontinuousdiscoflift.Whenthebladeschangeangle,orpitchcollectively,thehelicopterrisesorfalls.Thepilotsrighthandalwaysholdsthecycliccontrol,effectivelytiltingthewhirlingdiscabove.Pointleft,tiltleft.Pointright,tiltright.Thecamerathenclosesinonthetailrotor.Onceagain,thealteringofthebladesaffectsdirection.Thechopperspinsinresponsetothepilotsdepressingoneofthetwofootpedals.Ifhedepressesthesecondpedal,thehelicopterspinsintheoppositedirection.ThePiaseckiH-21BTandemRotorAircraft,TheFlyingBananaThelastflyingH-21Bhelicopterintheworldtakesoff,headsforthebeachandcruises100feetabovethePacificsurfoffthecoastofCalifornia.Oneoftheearliesttandemhelicopters,theH-21Brepresentsthebirthoftheheavylifthelicoptersanddatesbacktotheearly1950s.NicknamedTheFlyingBananaforitsshape,theH-21Bhadmorepowerandgreaterstabilitythanprevioushelicopters.Thetandem-rotorH-21Bcarriestwosetsofwoodenbladessituatednearly50feetapartbutoperatedbyonesetofhelicopterflightcontrols.Thepilotmustbeevervigilant,asthishelicoptercouldrapidlyinvertshouldthepilotletgoofthecontrols.ThevintageH-21BusedforthefilmwasdecommissionedfromtheU.S.AirForcein1972andwasrestoredbytheCalifornia-basedClassicRotors:TheRareandVintageRotocraftMuseum.Thisnonprofitmuseumandrestorationfacility,dedicatedtothepreservationofunique,vintageandrarerotorcraft,spentmorethan10,000hoursreturningtheH-21Btoairworthiness.Everyhourflownrequires100hoursofmaintenance.ClassicRotorsistheonlymuseumofitskindtomaintaineighthelicoptersinflyingcondition.WhenitsnewfacilityinSanDiegohasbeencompleted,themuseumwillexpanditsexhibitsfrom15to30vintagerotorcraft.OneofthehighlightsofitscollectionisafamousrelativeoftheH-21B.ThisisaV44(thecommercialversionoftheH-21)-nicknamedTheHolyOne-andistheonlyonetolandattheVaticanandbeblessedbythepope.Whileona1959demonstrationtourinEurope,thehelicopteranditscrewhadprovidedhelptoItaliancommunitiesfollowingadevastatingearthquake.FutureHelicopterDesignsOneaspectofcurrentresearchcentersaroundthedevelopmentofquiettechnologythatwillallowhelicopterstobecomebetterneighborsandtooperatemorestealthilyinpoliceandmilitaryoperations.Quiettechnologyadvancesrelyonacombinationoftechnologies,whichincludeimprovedrotorbladedesignandtheuserofrotorsystemswithfourormoreblades.ReplacingthetailrotorwithaCoanda-effectNOTAR(NoTailRotor)systemgoesalongwayinreducingnoise,asdoesshroudingthetailrotorinanarrangementknowasafan-in-fin.Otheradvancesfocusonnoise-dampeningairinletsandimprovedenginenozzles.NewhelicopterdesignsaretestedintheworldslargestwindtunnelattheNASAAmesFlightResearchCenterlocatedatMoffettFieldinCalifornia.Ameswasfoundedin1939asanaircraftresearchlaboratoryoftheNationalAdvisoryCommitteeforAeronautics,whichbecamepartoftheNationalAeronauticsandSpaceAdministration(NASA)in1958.NASAhastheleadingroleinaerospaceoperationssystems,whichincludeairtrafficcontrol,flighteffectsonhumans,androtorcrafttechnology.NASAAmesscientistsandengineersstudyrobotichelicopters,high-speedhybrids,andadvancesinquiettechnology.Thecenteralsohasmajorresponsibilitiesforthecreationofdesignanddevelopmenttoolsandforwindtunneltesting.TheNASA-BellXV-15Tilt-rotorInthefilm,anXV-15convertsoverDallas-FortWorthAirport.TheXV-15isanexperimentalrotorcraft,theparentofanewfamilyofaircraftcalledtilt-rotors.Thetilt-rotorcombinesthehoveringabilityofthehelicopterwiththespeedofafixed-wingaircraft.TheXV-15cantakeoffandlandlikeahelicopter.Theaudiencewillseetheenginestiltingforwardasthetilt-rotorbecomesahigh-speedplane.TheBell-BoeingV-22OspreyAV-22Ospreyunwraps,emerginglikeaprehistoricflyingdinosaur.BuiltprimarilyfortheU.S.Marines,AirForce,andNavy,theV-22Ospreyhaswingsthatpivotandrotorsthatfoldtofacilitateitsstorageatsea.Inlessthan90seconds,youwillseetheV-22completethisprocess.Althoughstillclassifiedasatilt-rotor,itisfaster,withthreetimestherangeandmorethantentimesthepayloadofitspredecessor.Itshowsthepromiseoflong-distancetravel,withoutairports.TheHawk4GyroplaneRotorcraftevolutionisalsointhehandsoftheentrepreneur,andthisindependentspiritismostevidentintheHawk4Gyroplane.Whilesomedesignsproducegroundbreakingchanges,thisaircraftbroughttheeconomyandsafetyoftheAutogirointothespaceage.Arotorisusedforslow-speedflight,butathigh-speedcruisingalltheliftisprovidedbythewingwhiletherotorhasnolift.TheGyroplaneshowspromiseasahigh-speed,low-disc-loadingrotorcraft.TheBoeing-SikorskyRAH-66ComancheTheComancheripsanddipsacrossthescreen,setagainstasunset.Thisprototypehelicopterhasstealthtechnology.Itssmart,agile,fastandinvisibletoradar.Itsthefirsthelicoptertoprovidereal-timedigitaldatatoheadquarters.Seeinginthedark,sensingtheforcesatplayaroundusandactingontheevidenceinrealtime,theComancheisacomplexflyingmachinewithahumanbeingatitsheart.Everyday,inunexpectedways,itextendsourpowersandputsustoworkwitharevolutionarytool.TheComancheisthecentralelementoftheU.S.ArmysfutureObjectiveForce.Inadditiontoitscomplementofmissilesand20-mmcannon,theaircraftcarriesstate-of-the-artsensorsandavionicstoprovidebattlefieldcommanderswithsomuchaccurateinformationaboutenemymovements.Thisknowledgewilltranslateintomoreprecisetargeting,increasingtheeffectivenessoffriendlyforcesbeyondcurrentcapabilities.TheU.S.Armyhasdefinedarequirementofmorethan1,200ComanchesfortheObjectiveForce.TheRAHComanche,thearmys21st-centurycombathelicopterisbeingdevelopedbytheU.S.ArmyandateamofleadingaerospacecompaniesheadedbytheBoeingCompanyandSikorskyAircraftCorporation,aunitofUnitedTechnologiesCorporation.TheSikorskyUH-60BlackHawkandAS350B2AStarEnforcetheLawEventsswiftlyunfoldastheradarplanespotsanunidentifiedCessnadroppingbundlesofdrugsoffthecoastofMiamiatdawn.AsignalalertstheMarineandAirBranchofU.S.Customswhospeedouttointerceptthesmugglers.Justasthedrugsaretransferredfromboattovan,TheAStarhelicopterburstsoverthetreetops,deployingatacticalteamtoarrestthedriver.WhilethesmugglersCigaretteboatattemptstoescape,aBlackHawkhelicopterdipsdowntocreateagiantbackwash.Inastunningdisplayofimpeccableteamwork,thisactionforcesthefleeingboattoswervetoahaltasaCustomsboatcutsitoffandapprehendsthecriminals.Onatypicalday,theU.S.CustomsServiceexamines1.3millionpassengers,2,642aircraft,50,889trucks/containers,355,004othervehicles,588vessels,64,923entriesandundertakesthefollowingenforcementactions:64arrests,107narcoticseizures,223otherseizures,9currencyseizures.Theseamountto5,059poundsofnarcotics,$443,907incurrency,$228,803inconveyances,$525,791inmerchandiseandmorethan$15,800inarmsandammunition.FilmedoveraperiodoffivedaysoffthecoastofMiami,theair,land,andseadrugbustwasstagedbytheU.S.CustomsService,whichreliesheavilyonhelicoptersduringsuchoperations.U.S.Customspilot,TomStanton,participatedintheshootwithhisco-pilotKimberlyKessel.KesselisoneofsevenwomenU.S.CustomspilotsandonlyoneoftwoqualifiedtoflyBlackHawks.Bothpilotsvolunteeredtoworkwiththefilmcrew.SaysKessel,agraduateofEmbry-RiddleAeronauticalUniversity,Theywerephenomenal,readytotryanything.Inadditiontodaytimeflights,Stantonfliestheriskiernightmissions.Flyingatnightisdangerousasyouloseallperceptionofwhatsupordownbecauseboththeskyandoceanareblack,sotheyjustkindofrunintogether.Theresnohorizononthosedarknights,saystheveteranpilot.Typicallyhefliesfrom300to500feetabovethewaterat120to150knots.Notmanypeopleflythatlow,eveninthedaytime,saysStanton.Theresnoautopilot,soitshandson.Plusyourechasingsomeone.Youhavetobeaware.Itcangettenseoutthere.Stantondescribesanairchase:Oncetheresatarget,welaunchajetwithradar.Thejetpilotcallsthehelicopteroutandwelinkup,flyinginformation.Wefollowthebadguywhereverhegoes.Ifhehasextended-rangefueltanks,weleapfrogandsendanotherhelicopterouttotakeupthechase.(TheBlackHawkcarriesfivehoursoffuel.)Whenhegetsintohislandingconfiguration,wecallthelocalpoliceorsherifftohelpusout.TheBlackHawk,whichcancarryupto14people,typicallycarries4or5armedpersonnel,soweinstantlyhaveaforceofpoliceofficerstheretogetthebadguys.Ifitsaboat,wehaveCigaretteboatslikethesmugglers.Wellcallourboatandhaveitintercept.StantonfliestheBlackHawknexttotheboat,makingithardforthesmugglerstonavigate.Itintimidatesthemintogivingup.Sometimestheydo[but]sometimeswechasethemforhours.Orwellfollowthemintoamarinaandblockthemuntilourboatscome.Iftheyhitthebeach,wellcallthestatepoliceorsheriff,andtheysetupaperimetersotheguycantgetout.Stanton,whofliesmissionsasoftenasonceortwiceaweek,hasbeenflyingfor26years,13ofthoseasanarmyhelicopterpilotbeforehejoinedU.S.CustomsinMiamiwhereheisthestandardizationinstructorpilot.Hemakessurethateverybodyfliesthesameway,sothatwhentheyteamup,thepilotseasilyworkintandem.Pilotsfly8-hourshiftsandtheoperationgoeson24hoursaday,7daysaweekinareascoveringboththeCanadianandMexicanlandborders,theAtlanticandPacificcoastlines,andtheGulfofMexico.TheMD500EHelicopterAMD500helicopterhoversdirectlyabove500,000-voltpowerlines.Asitinchescloser,alightningboltsuddenlyzapsoutfromthehotline,arcingtowardthewandextendedbyalinemanperchedonanaluminumplatformthatjutsoutfromthehelicopter.Thehot-line-qualifiedlinemanclampsontothepowerlines,andhelicopterbacksoff,leavinghimtowirewalk,crawlingalongparallellinestoinspectthePPLpowerlinegrid,100feetofftheground.Toreboardthehelicopter,thelinemanmustbondoff,reversingtheprocedure.Idontgivetwohootsandaholleraboutflyinginsideahelicopter.Putmeoutside,thatswhereIwanttobe,saysDanielSpiderLockhart,AgRotorslineman.TheresonlythreethingsIvebeenafraidofmostofmylife:Onewaselectricity,onewasheightsandtheotherwaswomen.And,Immarriedtoo,hegrins.Thesafestlinemanisonethatisafraidofelectricity.Whenwebondtothepowerlinesenergizedathalf-a-millionvolts,wehavetobringourselvestothesamepotential.Thatiswhyyouseethatarcjumpingouttoourwandaswemakeboththehelicopterandthepowerlineatthesamepotential,sothatwecaneliminatetheflowofcurrent,explainstheveteranlineman.Spiderwearsaprotectivehotsuit,75percentNomexforfireretardationand25percentstainlesssteelthread.ThemetalthreadbasicallymeansIhaveacagearoundmethatcanbeenergizedatveryhighvoltagelevels.Ahalf-millionvoltspassovermybody,butIcanworkwithoutinterferencefromtheelectricity.Hecontinues,Watchingthatelectricityjumpoutwhileyoureenergizingthehelicopterisathrill.Gettingonthewire,walkingthewiretodorepairsisathrill.ThebiggestthrillIgetisfromdoingwhatIdoisbeingabletodobothtogether-theelectricalpartandthehelicopterpartofit,thespeedatwhichwecandoitandstillbesafe.Therearesomanythingsthatthehelicopterenablesustodoaslinemen,whichisveryrewarding.TheteamworkoftheskilledhelicopterpilotsandhighlytrainedlinemenensurethatthePPLCorp.providesaconstantsourceofelectricitytoits1.3millioncustomersinPennsylvania(inadditionto4.4millioninLatinAmericaandEurope).Tomaintaintheintegrityofthetransmissionsystemtoresidentialandcommercialestablishments,andtoensurethesafetyoftheoperation,theteamplansandrehearseseverymovewhileonthegroundbeforetakeoff.Evenso,unanticipatedgustsofwindandglarefromthewirescanaffectthepilotsdepthperception,requiringtotalconcentrationduringhishoursatthecontrols.Asthehelicopterisisolatedfromtheground,thepilotandlineman,cladinprotectivestainlesssteelsuits,mustbondontothetransmissionlinestobringthemselvestothesamevoltagepotentialofthelinetoworksafely-parallelingwhatabirddoeswhenitsitsonawire.ProbablythemostunusualplacethatthedirectorriggedthecamerawasontheendoftheplatformontheMD500,whichisdesignedtocarrythelinemanashebondsontothehalf-million-voltpowerline.Wetookawaythelinemanandputthecamerainhisplace;thelinemanrodebehindthecameraandusedhiswandtodrawthearcofelectricityrightontothecameralens.Idontthinkitsbeendonebefore.Itblewalltheelectronicsoutofthecameraacoupleoftimesbeforewefiguredouthowtodoit,recallsDouglas.TheBoeing234Helicopter:HeliloggingwithLimitedEnvironmentalDamageFloatingabovetheforestinnorthernCalifornia,a12-tonBoeing234helicopterselectsitstargetwithprecision.Selectiveloggingisaprocesswhereonlyaportionoftheavailabletimberisremovedfromaloggingsite.Asingletreeisliftedstraightupfromtheforestfloor,leavingtherestoftheareaenvironmentallyintact.Removingsuchtimber-veryoftentreesthatarealreadydeadordiseased-allowstheremainingtreestothriveontheadditionalresourcesofsunlight,water,andsoilnutrients.Heliloggingisenvironmentallyfriendlyinotherwaysaswell.First,sincethelogsareliftedfromtheground,littlesoilerosion,typicalofconventionalloggingmethods,occurs.Second,inmanycasesthehelicopterisabletouseexistingroadsforlandings,meaningnonewroadsneedtobebuiltintotheareabeinglogged.ColumbiaHelicopterscutsmorelogseachyearthananyotherhelicopterloggingcompany.Topreparethetimberforthehelicopter,thespeciallytrainedloggingcrewcutitintocarefullyweighedsections.Columbiasflightcrewsareamongthemostexperiencedatlong-lineworkintheworld.Withspeedandprecision,theyareabletomoveheavyloadsoflogsattheendoflinesupto350-feetlong.OncethelineisloweredfromtheBoeing234helicopter,steeltongsclampthelogandtheentiretreeisremovedwithoutdisturbingthebalanceofnature.Itskindalikelookindown25storiesandpickingupatelephonepole,commentsthehelicopterpilot,DaveStroupe,whodepositsthetimberatanearbytransferyard.Theuniquethingaboutthishelicopteristhat,whenwetakeofffromtheground,weweighapproximately22,000pounds.Andwereriggedforabout26,000poundswhenwegetlowonfuel.Sotheloadactuallyweighsmorethanthehelicopter.Itsexcitingandharrowingallatthesametime.TheBoeing234shavealiftcapacityof28,000lb,(12,727kg),butmostoftencarryloadsbetween23,000lb,(10,454kg)to24,000lb(10,909kg)duetoelevationandairtemperatureconsiderations.Thecompanytrainsloggerstoworkwithhelicoptersbecauseloadweightissuchadramaticpartofwhattheydo.Weightisdetermined,usingaformula,whichareafunctionofthevolumeandthetypeofwood.Differenttreespecieshavedifferentweightspervolume.Whenoneofthepilotssuggestedusingthelogasaplatformforthecamera,Douglasrealizedanotherexcitingcameraangle.Thepossibilityexistedthatthebranchescouldscrapeoffthecameraasthelogwashauledup.Douglaspreventedthisbyplacingthecamerainsideaheavysteelavalanchebox,whichheanchoredontheendofabiglog.Oncethelogwasgrappled,thehelicopterhauledtheprotectedcamerarightthroughthebranches,givingtheaudienceabreathtakingviewfromtheperspectiveofthelog!TheU.S.MarineCorpsAV-8BHarrier,AH-1WCobra,CH-53ESuperStallionandCH-46ESeaKnightonaMilitaryMissionAnAV-8BHarrierjetdemonstratesitsverticallandingabilityfollowedbyaforcereconnaissanceinserviceexercisefromanaircraftcarrier,asMarinesclimbaboardtheCH-53E.AH-1WCobrasandHarriersformanassault-supportpackage,asthereconnaissanceteamsetsoutonamissiontoobtaininvaluableintelligenceabouttheenemy.InsidetheCH-53E,themachine-gunnerisatthereadyasaCobrafiresthreerockets.TheactionheatsupastheIMAXcameracapturestheMarinesfast-ropingthroughthehellholeandslidingdownaropedanglingfromtheCH-53E,landinginenemyterritory.Theleaderofthereconnaissanceteamsays,Bythetimeyougettotouchropeinalivesituation,youandyourmenfeeltighterthanfamily.Yourfatesaretiedlikethestrandsofarope.TwohourslatertheMarineshavecompletedtheirmissionandarereadytobeevacuated.Nowtheenemyhuntsthemontheground.TreesshakeastherescueCH-53Ehelicopterhoversoverhead,loweringaropetothesquad,nowuptotheirwaistsinwater.Oneaftertheother,inamatterofseconds,themenclipthemselvesontotherope.Extraction,evenmorethaninsertion,iswhenyouneedspeed.Youvebeenawfulquiet.Suddenly,youreawfulloud,saysSgt.JamesKenneke,thesquadleader.Hesfirstinandlastout.Liftedup,likewashingonaline,thesquaddanglesbeneaththehelicopterasitisescortedbyCobras,outovertheAtlantic.Itsarelieftogetout.Buttheresthatmomentofdoubt.Everythingslowsdownwhileyoureexposedholdingyourbreathforthathappyending.Andwhenyougetit,youfeelontopoftheworld.Ofcourse,thenwevegottocommutehomejustlikeeverybodyelse,smilesKennecke.TheMi-26andMi-8DeliverHumanitarianAidSometimes,somethingverypreciousmustbedeliveredbehindenemylines-food.SierraLeoneisanationthathassufferedyearsofconflict.Fromthefooddepottothehotspot,helicoptersprovideanairbridge.Hoistingfoodandmedicalsuppliestodistressedpeoplebehindrebel-heldterritories,theyhavetheabilitytohopoverhotzonesindesperatesituations.Theworldslargestproductionhelicopter-theRussian-madeMi-26-istheworkhorsefortheUnitedNations(UN)peacekeepingoperationinwar-tornSierraLeone.Theheaviestproductionhelicopterintheworld,thismajesticeight-bladedcraft-oneoffourcharteredbytheUNfromRussia-cancarryamaximumof44,090lb(20,040kg)ofinternalpayloadorupto70troops.TheMi-26stopspeedis183mph(295kph)andithasarangeof304miles(400km).Inthissequence,theMi-26isloadedwithcargotosupplyUNtroopsprotectinganisolatedcommunityinthecenterofrebel-heldterritory.Theworldslargestfoodagency,theUNWorldFoodProgram(WFP),organizedamassiveaircampaigntargetinginternallydisplacedpersonsthathadcongregatednearaclinicformalnourishedchildren.OncerebelsfromtheRevolutionaryUnitedFront(RUF)hadsurroundedtheareaandblockedroadaccess,theWFPwaspreventedfromcompletingabulkdistribution.Instead,theyloadeduptheirMi-8andflewtotheDaruclinicwherethemostvulnerablewomenandchildrenwerelocated.AllchildrenunderfivewhoaremalnourishedaregivenaspecialfeedingprograminDaru.Andtheunder-fivearealwaysthefirstonesyoutargetforanykindofextrememalnourishedcases,becausetheydieveryquickly,saysAyaShneerson,programofficerfortheWFP.Daruisakindofanisland,asafeisland,surroundedbyareasthatareunsafe,shesays,andforthatreason,italwaysservedasasortofmagnetfortheveryvulnerablepeoplecomingout.AnotherbigWFPoperation,FoodforPeace,givesfoodtochildex-combatants,inanefforttoattractthemtodisarmamentanddemobilizationcamps.Theheavilyladencraftflewoutofthecapitalcity,Freetown,situatedonthewestcoastofAfricabetweenGuineaonthenorthandLiberiaonthesouth.TheWFPsupervisesavarietyoffeedingprogramsinthedisplacementcamps,feeding5,000inanoperationthattargetedBunbuna,KabalaandDaruin2000.Throughouttheworld,helicoptershavesavedmillionsofhumanlives.Thereare777millionpeopleindevelopingcountries,accordingtotheWFP.In2001theWFPfed77millionhungrypeople(10percentofthehungrypoor)in82countries.Diamonds,whichshouldhavebroughtprosperitytoSierraLeone,insteadresultedinoneofthemodernworldsmostbrutalinsurgencies,datingbackto1991whenrebelslaunchedawartooverthrowthegovernment.Intheensuingyears,continuousbattlesbetweenthevariousfactions-rebels,thearmyandthegovernment-displacedtensofthousandsofinnocentcivilians,resultinginhungerandfamine.In1998UNobserversdocumentedreportsofongoingatrocitiesandhumanrightsabuses.In1999negotiationsbeganbetweenthegovernmentandtherebels,andanagreementwassignedinLometoendhostilitiesandformagovernmentofnationalunity.By2000,theUNsexpandedroleresultedinthedeploymentof17,500militarypeacekeepingpersonneltovariouspartsofthecountry.FreeelectionsinMay2002havegivenhopeandafreshstartedinSierraLeone.TheAS350B2andAS350B3UsedforWildlifeRelocationInSouthAfrica,helicoptersarehelpingtosavetheblackrhinofromextinction.Protectedinafewremotepreserves,theirnumbersarerising.However,shouldtherhinosfeelovercrowded,theywillfighttothedeath.Toprotectthespecies,somemustberelocatedtosafehabitats,butthisiseasiersaidthandone.Aplatformdanglesfromahelicopteroverhead.Insideanotherhelicopter,flyinglowovertheSouthAfricanveldt,amanwitharifletakesaimatablackrhinoceros,dodgingthroughthebushesbelow.Thepilotconcentratesonflying5feetaboveand10to15feetbehindtherhino.Anticipatingitseverymove,awildlifeveterinarianpullsthetriggerofhisgunloadedwithatranquilizerdart,scoringadirecthitthatsuccessfullypenetratestherhinosinch-thickskin.WhenIamdartinganimalsliketheblackrhino,thereisthisimmensetrustbetweenmyselfandPiet,thepilot,sayswildlifeveterinarian,Dr.DouwGrobler,whospecializesinimmunizationsandtranslocations.Iknowexactlywhathesgoingtodoandwherehesgoingtoplaceme.Idonthavetothink.Icanjustconcentrateontheanimals.Ijustknowhesgongtoputmethereintherightspotattherighttime.Itsalmostthathesenseswhattheanimalsgoingtodo.Inthatway,hecanchangetheanimalsmindwithhishelicopter.Groblerhasmeasuredaspecificdrugdosage,whichcankeeparhinoasleepforuptotwohours.Oncetherhinoisdarted,thegroundcrewlandsassoonaspossibletoundertakeamultitudeoftasks.Theymonitorthebeastsvitalsigns,takeskinandbloodsamplestostudyitsbasichealthandtodetectanynutrientsthatarelacking.Thisensuresthatthehabitatishealthyforlong-termpropagation.Theyalsoconductpregnancytesting.Eachrhinosearisnotchedsothatitcanbeidentifiedeasilyfromtheairandground.Thetipofthesecondhornisremovedtoprovidematerialforgeneticresearch,andatransmitterisfittedintotherhinoshornfortrackingitswhereabouts.Poacherspresentaconstantdangertotherhinossecurity.Shouldapoacherremovethehornforexport,thetransmitterwouldtriggeranalarm.Whentwomalesinhabitthesameterritory,onemustberelocatedbeforetheybattletothedeath.Placingaslinginposition,thecrewrollstherhinoaboardtheplatform,makingsureitisfullyasleep.Withaliftingcapabilityof3,500lb(1,590kg),theAStarB3canrelocatethe2,250-lb(1022-kg)rhinotoanareaofthesanctuarythatisaccessibleonlybyhelicopter.Theextensiveresearchonelevenblackrhinosacquiredduringthefour-dayshootwasmadepossibleonlythroughSKFilmsfinancialcontribution.MyfieldofexpertiseliesinthecaptureandrelocationofAfricanwildlife.IamextremelygratefultoStraightUp!forsponsoringthisincrediblyimportantresearchandrelocationprogramatthegamepark.Withoutthefilm,thisresearchwouldnothavehappened,saysGrobler,whoorganizedthecapture,researchandrelocationproject,withthefilmsproductioncrew.Everyanimalisjustsovaluable,hesays,andanyinformationthatcanbecollectedonthemisworthitsweightingold.Theprehistoricancestoroftodaysrhinosexistedmorethan50millionyearsago.Amongtodaysfiverhinospecies,theblackrhino,whichhastwohorns,hassufferedthemostspectacularrateofdecline.Fromapopulationof65,000in1970ithadbeenhuntedalmosttoextinction,decliningtoapopulationof2,300by1992-93.CurrentstatisticsindicatethattheAfricanblackrhinopopulationhasrisento3,500asaresultoftheprotectionofnaturereserves,developedbyconservancygroups,agenciesandgovernmentstofacilitatebreedingandrelocationprograms.ThissegmentofStraightUp!wasfilmedinonesuchreserveinSouthAfrica,whereblackrhinoshadbeenreintroducedin1986.Thehelicopter,anirreplaceableco如果您喜欢鸣科影院（www.syjdsmgs.com）分享的《直升机在行动》，别忘了推荐给你的好友！
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