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Version 1.75 July 2018
Beforeusingthebigearsfacilityinearnestitisessentialtopractisebeforehandwithplentyofgroundclearancein
casealeadingedgecollapseoccurs.Alwayskeepholdofbothbrakesinordertoretaincontrol.Puttingyourhands
throughthebrakehandlessotheyremainonyourwristsisagoodmethodofdoingthis.
B-Line Stall
Thisisafastdescentmethodandisausefulemergencyprocedure.Withbothhandsthroughthebrakehandles,take
holdofthetopoftheB-risers,oneineachhand,andpullthemdownbyaround50cm.Thiswillstallthecanopyand
forwardspeedwilldroptozero.Makesureyouhaveplentyofgroundclearancebecausethedescentratecanbe
over10m/sec.ToincreasethedescentratepullharderontheB-risers.WhenyoureleasetheB-risersthecanopywill
automaticallystartyingagain,normallywithintwoseconds.Sometimesthecanopywillturngentlywhenitexits
fromtheB-linestall.ItisnormallybettertoreleasetheB-risersfairlyquicklyratherthanslowly,asthelattermay
resultinthecanopyenteringdeepstall.
Alwaysreleasetheriserssymmetrically,asanasymmetricreleasefromaB-linestallmayresultinthegliderenteringa
spin.Thismanoeuvreisusefulifyouneedtolosealotofheightquickly,perhapswhenescapingfroma
thunderstorm.Itshouldnotbeperformedwithlessthan100mofgroundclearance(seealsoalsoChapter5).
Spiral Dive
Anormalturncanbeconvertedintoastrongspiraldivebycontinuingtoapplyonebrake.Thebankangleandspeed
oftheturnwillincreaseasthedownwardspiraliscontinued.Becarefultoenterthespiralgraduallyastooquicka
brakeapplicationcancauseaspinoranover-the-nosespiral.
BGDglidersaredesignedandtestedtorecoverfromnormalspiralswithadescentrateinferiorto16m/s,
automaticallywithoutpilotinput.Ifthepilotincreasesthedescentrateofthespiraltoover16m/sorinitiateswhatis
knownasanover-the-nosespiral,theglidermayrequirepilotinputtorecover.Inthiscaseallthepilotneedstodois
toapplysomeoutsidebrakeandsteertheglideroutoftheturn.
Theover-the-nosespiralisaspecialtypeofspiraldivewherethegliderpointsalmostdirectlyattheground.Itwill
enterthisifyoumakeasuddenbrakeapplicationduringthespiralentrysothattheglideryawsaround.Thenoseof
5.FlightCharacteristics