Bruce Goldsmith Design DUAL User manual

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Version 1.2 July 2018
DUAL
Power Trimmer
7.6 kgskgs
weight
load tested
risers
steering
250
MANUAL
Version 1.2 July 2018

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Version 1.2 July 2018

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1 - Introduction 5
2 - Preparation 8
  3-Pre-ightinspection       9
  4-FlightCharacteristics       10
  5-RecoveryTechniques       16
  6-Storageandservicing       19
  7-Closingwords        22
Risers 23
Line layout 24
  Linelengths         25
  Servicebooklet        26
Contents

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DUAL and DUAL LITE Owner’s Manual
TANDEM PARAGLIDER EN / LTF B
Welcome to Bruce Goldsmith Design
BGDisaworldleaderinthedesignandproductionofparagliders.FormanyyearsBruceGoldsmithandhisteam
havebeendevelopingproductswithworld-beatingperformanceforpilotswhowantthebest.Weapplyour
competitiveknowledgetodesigntopqualityproductsthatcombinethehighestperformancewiththesafehandling
ourcustomersvalueandrespect.BGDpilotsappreciateourqualityandreliability.BGD´sworld-classstatusisbased
ontheskillsandexpertisewehavedevelopedincombiningaerodynamicdesignwithclothandmaterialstechnology.
AllBGDproductsaredevelopedandmadewiththesameskillandattentiontogooddesignthataresynonymous
withtheultimateperformanceandprecisionrequiredbyparagliders.
Congratulations on your purchase of the BGD DUAL or DUAL LITE
TheDUAL/DUALLITEisaparaglider,designedtoahighstandardofsafetyandstability,butitwillonlyretainthese
characteristicsifitisproperlylookedafter.Pleasereadthismanualcarefullyfromthersttothelastchapterto
ensureyougetthebestoutofyourwing.
Thismanualhasbeenpreparedtogiveyouinformationandadviceaboutyourparaglider.Ifyoueverneedany
replacementpartsorfurtherinformation,pleasedonothesitatetocontactyournearestBGDdealerorcontactBGD
directly.
1 Introduction

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TheDUAL/DUALLITEisatandemparaglidersuitableforbothcommercialandrecreationaltandemying.
Exceptionalhandlingandeasylaunchandlandingcombinedwithgoodspeedandperformancemakethisawing
whichisrealpleasuretoy.
Thisparaglidermustnot:
• beownwithmorethanthemaximumcertiedtotalload
• haveitstrimspeedadjustedbychangingthelengthofrisersorlines(exceptbrakelines)
• betowedwithatowlinetensioninexcessof200kg.
• Itisyourdealer´sresponsibilitytotestytheparagliderbeforeyoureceiveit.Thetestightrecordofthisis
onthelastpageofthismanual.Pleasebesurethatthishasbeencompletedbyyourdealer.Failuretotesty
anewparaglidermayinvalidateanywarranty.
Anymodication,e.g.changeoflinelengths(exceptbrakelines)orchangestothespeedsystemcausesalossof
airworthinessandcertication.WerecommendthatyoucontactyourdealerorBGDdirectlybeforeperformingany
kindofchange.
Introduction
1 Introduction

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Specications
Projectedarea 34.33m2
Flat area 40.00m2
Weightexcludingbag 7.6kg(6.3kg)
Totallinelength 450m
Height 9.39m
NumberofmainlinesA/B/C/D 3/4/3/2
Cells 52
Flat aspect ratio 5.3
Projectedaspectratio 3.88
Rootchord 3.46m
Flat span 15.56m
Projectedwingspan 11.50m
Weightrange 120-220kg
Trimspeed 42km/h
Top speed 52km/h
Minsink 1.0m/s
Bestglide 9.0
Certication ENB
1 Introduction

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2 Preparation
1. Selectasuitabletakeoffareadeterminedbywindandterrain,clearofanyobstaclesthatmaycatchinthe
linesordamagethecanopy.
2. Ifyourparagliderhasbeencorrectlypacked,youshouldtakeittothetopofthetakeoffarea,andallowthe
rolledcanopytounrollitselfdownthehill(ifonaslope).Thisshouldleavetheparagliderwiththebottom
surfacefacingupwards,theopeningsatthedownwindendofthetakeoffarea,andtheharnessatthetrailing
edgeattheupwindside.
3. Unrollthecanopytoeachsidesothattheleadingedgeopeningsformasemicircularshape,withthetrailing
edgedrawntogetherasthecentreofthearch.Theharnessshouldbedrawnawayfromthecanopyuntilthe
suspensionlinesarejusttight.
2 Preparation

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3 Pre-ight Inspection
TheDUAL/DUALLITEisdesignedtobeassimpleaspossibletoinspectandmaintainbutathoroughpre-ight
procedureismandatoryonallaircraft.Thefollowingpre-ightinspectionprocedureshouldbecarriedoutbefore
eachight:
Whilstopeningouttheparagliderchecktheoutsideofthecanopyforanytearswhereyourparaglidermayhave
beencaughtonasharpobjectorevenhavebeendamagedwhilstinitsbag.
1. Checkthatthelinesarenottwistedorknotted.Dividethesuspensionlinesintosixgroups,eachgroup
comingfromoneriser.Bystartingfromtheharnessandrunningtowardsthecanopyremoveanytanglesor
twistsinthelines.Partiallyinatingthecanopyinthewindwillhelptosortoutthelines.
2. Itisparticularlyimportantthatthebrakesareclearandfreetomove.Checktheknotwhichattachesthe
brakehandlestothebrakelines.Severalknotsshouldbeusedhereortheymaygetentangledinthebrake
pulleys.Bothbrakesshouldbethesamelengthandthiscanbecheckedbyanassistantholdingtheupper
endofthebrakelinestogetherwhilstthepilotholdsthebrakehandles.Thebrakelinesshouldbejustslack
withthewinginatedwhenthebrakesarenotapplied.Aftercheckingthebrakelineslaythemontheground.
3. Alwayscheckthebucklesandattachmentsontheharness.Ensurethetwomainattachmentmaillons/
karabinersfromtheharnesstothemainrisers,andthesixshackleswhichattachtheriserstothelines,are
tightlydoneup
4. Beforethepilotandpassengerareattachedtotheirharnesses,bothshouldbewearingacertiedhelmet.Put
ontheharnessensuringallthebucklesaresecureandcomfortablyadjusted.
Yourparagliderisnowreadyforight.
3Pre-ightInspection

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4 Flight Characteristics
ThismanualisnotintendedasaninstructionbookonhowtoytheDUAL/DUALLITE.Youshouldbeaqualied
pilotorundersuitablesupervision,butthefollowingcommentsdescribehowtogetthebestfromyourDUAL.
Weight range
TheDUAL/DUALLITEiscertiedforaverylargeweightrange.Theglideriesbestintherangeof160-200kg,
thoughgenerallyitisnotsensitivetoweightdifferences,retainingniceyingcharacteristicsthroughoutthewholeof
thecertiedrange.Theweightreferstotheoveralltakeoffweight,whichmeanstheweightofthepilot,theglider,the
harnessandallotherequipmentcarriedwithyouinight.
IfyouytheDUAL/DUALLITEinthelowerhalfofitsweightrange,itwillbemoredampedandslightlylessagile.
Instrongturbulenceitwillhaveaslightlygreatertendencytodeformorcollapsethanifitwasmoreheavily-loaded.
IfyoumainlyyinweakconditionsyoushouldconsideryingtheDUAL/DUALLITEatthelowerendoftheweight
range.
IfyouytheDUAL/DUALLITEintheupperhalfoftheweightrangeitwillbemoreagile,morestableinturbulence
andslightlyfaster.Ifyouyinbumpyconditionsoryoupreferadynamicwing,youshouldaimtobenearerthetop
oftheweightrange.
Active Piloting
EventhoughtheDUAL/DUALLITEisdesignedasaneasytandemglider,‘activepiloting’isatoolthatwillhelpyouywith
greatersafetyandenjoyment.Activepilotingisyinginempathywithyourparaglider.Thismeansnotonlyguidingtheglider
throughtheairbutalsobeingawareoffeedbackfromthewing,especiallyinthermalsandturbulence.Iftheairissmooththe
feedbackcanbeminimalbutinturbulencefeedbackiscontinuousandneedstobeconstantlyassessedbythepilotthrough
4FlightCharacteristics