Gin Boomerang 10 User manual

Boomerang10
Owner’sManual
Rev.:1.0
Date: 01/11/2014

Boomerang 10 2 / 48
Thankyou for taking thetime to readthe
Boomerang10manual
©GinGlidersInc.
Gin Gliders reserves the right to alter or add to the contents of this Manual at any time. News
andthemostup to date informationwill be posted on the GinGliders website:
www.gingliders.com
Express written consent from Gin Gliders is required for any duplication of this manual, in
wholeorinpart (with the exception of short quotationsforspecialist articles).
Publicationofthismanualdoesnotimplythatthe common or trade-names, or otherintellectual
propertycontainedwithin it are madeavailable.

3 /48 Boomerang 10
Thankyou...
Thank you for choosing the Boomerang10. We are confident that this paraglider will provide
you with countless enjoyable experiences, long flights and exceptional competition results. A
thorough knowledge of your equipment will keep you safe and enable you to maximize your full
potential.
Please pass on thismanual to thenewowner ifyoudo resell your glider. Happy Flights andSafe
Landings,
The GIN team are very proud of the Boomerang10, if you have any questions about it that are
not answered in this manual, or if you have any hints or tips for getting the most out of the
Boomerang10,pleasedonothesitatetocontactus.
GINTeam

Boomerang 10 4 / 48
TableofContents
1.Introduction.......................................................................................................................7
AboutGinGliders....................................................................................................................7
Manual....................................................................................................................................8
GinGlidersHomepage............................................................................................................. 8
GinGlidersand the environment ............................................................................................ 9
Respect for nature and the environment............................................................................................9 
Environmentally-friendlyrecycling...................................................................................................9 
2.Safety..............................................................................................................................10
Safetyadvice........................................................................................................................ 10
Safetynotices....................................................................................................................... 10
Liability,warranty exclusion and operatinglimitations....................................................... 10
Liabilityandwarranty exclusion .....................................................................................................11 
Operating limitations.......................................................................................................................11 
Glidercategories and guidelines.......................................................................................... 11
CCCcertification...............................................................................................................................12 
Description of flight characteristics................................................................................................12 
Targetgroup and recommended flying experience...........................................................................12 
Descriptionofpilot skills required..................................................................................................12 
Suitabilityfortraining.....................................................................................................................12 
Description........................................................................................................................... 12
Cutting-edge Design.........................................................................................................................12 
Manufacturing..................................................................................................................................13 
3.Setting up theBoomerang 10and test-flying.....................................................................14
Beforethefirstflight........................................................................................................... 14
Brakeline adjustment......................................................................................................................14 
SpeedSystem...................................................................................................................................15 
Certified Harnesses..........................................................................................................................15 
Reclined harnesses..........................................................................................................................16 
Reserve............................................................................................................................................16 
CertifiedWeight Range......................................................................................................... 16
Firstflight............................................................................................................................ 16
4. Flying the Boomerang 10 ..................................................................................................17
Preparationfor launch.......................................................................................................... 17
5-pointcheck........................................................................................................................ 17
Launch.................................................................................................................................. 18
Light or nil wind launch....................................................................................................................18 
Strongwindlaunch ..........................................................................................................................18 
Lineknots ortangles .......................................................................................................................18 

5 /48 Boomerang 10
Levelflight and bestglide.................................................................................................... 18
Acceleratedflight................................................................................................................. 19
B-Risercontrol..................................................................................................................... 19
Turns .................................................................................................................................... 19
Losingaltitude...................................................................................................................... 20
Big ears............................................................................................................................................20 
B3-Descent.......................................................................................................................................20 
B-Stall..............................................................................................................................................20 
Spiraldive........................................................................................................................................20 
Landing................................................................................................................................. 21
Typesofuse.......................................................................................................................... 21
Tow launch.......................................................................................................................................21 
Motorized flight...............................................................................................................................21 
Tandem paragliding..........................................................................................................................22 
Aerobatics........................................................................................................................................22 
5.Dangerous situationsand extreme flying..........................................................................23
Dangeroussituations............................................................................................................ 23
Safetytraining ..................................................................................................................... 23
Material stress and damage.............................................................................................................23 
Canopycollapses.................................................................................................................. 24
Asymmetriccollapse........................................................................................................................24 
Cravat/glider wrapped around lines...............................................................................................24 
Symmetricfront collapse.................................................................................................................25 
Typesofstall........................................................................................................................ 25
Deepstall (parachuting, stable stall)...............................................................................................26 
Fullstall (dynamic stall) ..................................................................................................................26 
Spin..................................................................................................................................................26 
Othertipsfordangerous situations ..................................................................................... 27
Cascade............................................................................................................................................27 
Emergency steering .........................................................................................................................27 
Flying in the rain..............................................................................................................................27 
Advertising and adhesives...............................................................................................................27 
Overloading......................................................................................................................................27 
Sandand salt air..............................................................................................................................27 
Temperaturerange...........................................................................................................................28 
6.Storing,care, maintenance andrepairs..............................................................................29
Storingtheparaglider.......................................................................................................... 29
Packing the paraglider.....................................................................................................................29 
Rucksack...........................................................................................................................................30 
Storingand transportingthe glider.................................................................................................30 
Care...................................................................................................................................... 31
Groundhandling...............................................................................................................................31 
Fabric...............................................................................................................................................31 

Boomerang 10 6 / 48
Lines ................................................................................................................................................32 
Rigid construction............................................................................................................................32 
Cleaning...........................................................................................................................................32 
Maintenance.......................................................................................................................... 33
Typedesignation..............................................................................................................................33 
Inspection periods...........................................................................................................................33 
Validityof inspection.......................................................................................................................33 
Linetrimming...................................................................................................................................34 
Repairs................................................................................................................................. 34
GinGliders workshops.....................................................................................................................34 
Smallrepairs to theglider...............................................................................................................35 
7.Dimensions, illustrations,technical andCCCdata...............................................................36
Overall illustration............................................................................................................... 36
Technicaldata....................................................................................................................... 36
Lineplan,line system andrisers.......................................................................................... 37
Line plan ..........................................................................................................................................37 
Line system......................................................................................................................................38 
Folding lines ....................................................................................................................................38 
Risers...............................................................................................................................................38 
Materiallist.......................................................................................................................... 39
CCCTest-Lab-Template ......................................................................................................... 40
SizeS...............................................................................................................................................41 
SizeM...............................................................................................................................................46 
SizeL................................................................................................................................................51 
Appendix .............................................................................................................................56
Addresses............................................................................................................................. 56
Gliderdetails........................................................................................................................ 57
Pilotdetails / Proof of ownership ....................................................................................................57 
Inspections andrepairs overview....................................................................................................58 
Notes.................................................................................................................................... 59

7 /48 Boomerang 10
1. Introduction
About Gin Gliders
Dream
InformingGinGliders,designerand competition pilot Gin SeokSonghadonesimple dream:
to make the best possible paragliding equipment that pilots all over the world would love to
fly—whatevertheirambitions.
At Gin Gliders, we bring together consultant aerodynamists, world cup pilots, engineers and
paraglidingschool instructors, all with one goal: creating better paragliders.
Touch
We’re a “hands-on” company that puts continuous innovation and development at the centre of
everythingwedo.
At our purpose-built R&D workshop at head office in Korea, we are able to design, manufacture,
test-fly and modify prototypes all in a matter of hours. Our international R&D team is on hand
both in Korea and at locations worldwide. This guarantees that your equipment has been
thoroughlytested to cope with thetoughestflying conditions.
OurownproductionfacilitiesinEastAsiaensure the quality of thefinished product and also the
well-beingofour production staff.
Believe
We believe that the product should speak for itself. Only by flying can the pilot understand the
wing and develop trust and confidence in it. From this feeling comes safety, comfort,
performanceandfun.Thegrinwhen you land should say it all!

Boomerang 10 8 / 48
Manual
We recommend that you familiarise yourself with your new paraglider by reading this Manual
before your first flight. This will allow you to acquaint yourself its new functions, to learn the
best way to fly the paraglider in various situations, and explain how to get the best out of your
paraglider. Information in this Manual on design of the paraglider, technical data and
illustrations are subject to change. We reserve the right to make changes without prior
notification.
The Manual complies with the airworthiness CCC Requirements_3.5-V8 and forms part of the
certification.
Thereareatotaloffourimportant parts to the Manual,whichgive the following information:
1. Manual(thisdocument):
Instructionsongetting startedand using theparaglider
2. InspectionInformation:
Generalinstructionsandguidance on carrying out the regular inspectionof
paragliders
3. CCCTest-Lab-Template:
CIVLmeasurementfileforCCCgliders(October 2014)
4. Glider details
Pilotdetails,proof of ownershipandinspections and repairs overview
This Manual was current at the time of going to print. This Manual can be downloaded from GIN’s
website prior to print.
Gin Gliders Homepage
Gin Gliders has a comprehensive website, which provides additional information about the
Boomerang10, any updates to the Manual and many other issues related to paragliding. GIN’s
websiteisthefirstportofcall for GIN’s worldwidefollowing:
www.gingliders.com
On Gin Gliders website, you will find an extensive range of accessories for your paraglider,
useful products for pilots, as well as additional information and accessories for your
Boomerang10
Youwillalso find links theretoother services andwebsites:
GinGlidersShops
Facebook,Twitter&youtube
These websites and their content are provided for your use. The content of Gin Gliders websites
has been made available for your use on an “as is” and “as available” basis. Gin Gliders
reservesthe right to alter thewebsites at anytimeortoblockaccessto them.

9 /48 Boomerang 10
Gin Gliders and the environment
Protection of the environment, safety and quality are the three basic values of Gin Gliders and
these have implications on everything we do. We also believe that our customers share our
environmentalawareness.
Respect for nature and the environment
Youcan easily play apart in protection ofthe environment bypractising our sportin such a way
that there is no damage to nature and the areas in which we fly. Keep to marked trails, take
your rubbish away with you, refrain from making unnecessary noise and respect the sensitive
biologicalequilibrium of nature. Consideration for nature is required even at thelaunchsite!
Paraglidingis,ofcourse,an outdoor sport – protect and preserve our planet’sresources.
Environmentally-friendly recycling
Gin Gliders gives consideration to the entire life cycle of its paragliders, the last stage of which
is recycling in an environmentally-friendly manner. The synthetic materials used in a paraglider
must be disposed of properly. If you are not able to arrange appropriate disposal, Gin Gliders
will be happy to recycle the paraglider for you. Send the glider with a short note to this effect
totheaddressgivenintheAppendix.

Boomerang 10 10 / 48
2. Safety
WARNING The safety advices and instructions contained in this Manual must be followed in all
circumstances. Failure to do so shall render invalid the certification and/or result in
lossofinsurancecover,andcould lead to serious injuriesorevendeath.
Safety advice
Paragliding demand a high level of individual responsibility. Prudence and risk-awareness are
basic requirements for the safe practice of the sport, for the very reason that it is so easy to
learn and practically anyone can do so. Carelessness and overestimating one’s own abilities can
quickly lead to critical situations. A reliable assessment of conditions for flying is particularly
important. Paragliders are not designed to be flown in turbulent weather. Most serious
accidentswithparagliders are caused by pilotsmisjudging the weatherforflying.
In Germany, paragliders are subject to the guidelines for air sports equipment and must not
under any circumstances be flown without a valid certification. Independent experimentation is
strictly prohibited. This Manual does not replace the need to attend training at a paragliding
school.
The Manual must be passed on to any new owner if the paraglider is sold. It is part of the
certificationand belongs with theparaglider.
Observetheotherspecificsafetyadviceinthevarious sectionsofthisManual.
Safety notices
Safety notices are issued when defects arise during use of a paraglider which could possibly
also affect other gliders of the same model. The notices contain instructions on how the
affectedgliderscanbeinspected for possible faults and the steps required to rectify them.
Gin Gliders publishes on its website any technical safety notices and airworthiness instructions
which are issued in respect of GIN products. The paraglider owner is responsible for carrying
outtheaction required by the safetynotice.
Safety notices are issued by the certification agencies and also published on the relevant
websites. You should therefore visit on a regular basis the safety pages of the certification
agencies and keep up-to-date with new safety notices which cover any products relating to
paragliding.
Liability, warranty exclusion and operating limitations
Useoftheparagliderisatthepilot’sownrisk!
The manufacturer cannot be held liable for any personal injury or material damage which arises
in connection with Gin Gliders paragliders. The certification and warranty shall be rendered
invalid if there are changes of any kind (incl. paraglider design or changes to the brake lines
beyond the permissible tolerance levels) or incorrect repairs to the glider, or if any inspections
aremissed(annual and 2-yearly check).

11 /48 Boomerang 10
Pilots are responsible for their own safety and must ensure that the airworthiness of the glider
is checked prior to every flight. The pilot should launch only if the paraglider is airworthy. In
addition, when flying outside of Germany, pilots must observe the relevant regulations in each
country.
The glider may only be used if the pilot has a licence which is valid for the area or is flying
under the supervision of an approved flying instructor. There shall be no liability on the part of
thirdparties,inparticularthe manufacturer and the dealer.
Liability and warranty exclusion
Intermsofthewarrantyand guarantee conditions, theparaglider may not be flownifanyofthe
followingsituationsexists:
the inspection period has expired, or the inspection has been carried out by the pilot
him/herselforby an unauthorisedinspector
thepilothasincorrect or inadequateequipment(reserve, protection, helmet etc)
the glider is used for winch-launching with a winch which has not been inspected or
bynon-licensedpilotsand/or winch operators
thepilothas insufficient experience or training
Operating limitations
The paraglider must be operated only within the operating limits. These are exceeded, if one or
moreofthefollowing points arecomplied:
thetake-offweightisnotwithinthepermissibleweightrange
the glideris flown in rainor drizzle, cloud, fogand / or snow
thecanopyiswet
thereareturbulent weather conditionsorwindspeedsonlaunch higher than 2/3 of
themaximumflyableairspeedof theglider(varies according to the totaltake-off
weight)
air temperature below-10°C and above50°C
thegliderisusedforaerobatics/extreme flyingor flight manoeuvres at anangle
greaterthan90°
there have been modifications to the canopy, lines or risers which have not been
approve
Glider categories and guidelines
WARNING The descriptions of flight characteristics contained in this Manual are all based on
experiences from the test flights, which were carried out under standardised
conditions. The classification is merely a description of the reactions to these
standardtests.
The complexity of the paraglider system means that it is not possible to give any more than a
partial description of the glider’s flight behaviour and reactions to disturbances. Even a small
alteration in individual parameters can result in flight behaviour which is markedly modified
anddifferentfromthedescription given.

Boomerang 10 12 / 48
CCC certification
TheBoomerang10receivedCCCclassificationin the final classification by the licensing body.
Description of flight characteristics
„Paragliders with demanding flying characteristics and potentially violent reactions to
turbulenceandpilot errors.Recovery to normal flightrequires precise pilot input.“
Target group and recommended flying experience
„ Performance pilots with extensive flying experience of at least approx. 75 hours airtime per
year,whowishtoflyata top performancelevelin,e.g. cross-country flying.“
The Boomerang10 is designed from the outset as a CCC competition glider, and has the highest
performance of any GIN glider. It is suitable for the very experienced pilot who flies frequently
and wants the highest possible performance, and is aware of the risks associated with high
performance gliders and has the skills to handle such wings and extreme flight manoeuvres for
thisclass.
Description of pilot skills required
„ Designed for pilots well-practised in recovery techniques, who fly very actively, have
significant experience of flying in turbulent conditions, and who accept the implications of
flyingsuchawing.“
Suitability for training
TheBoomerang10isgenerallynotsuitable for use as a trainingglider.
Description
The Boomerang10 is a high performance competition wing designed from the outset for CIVL
Competition Class certification. It is highly optimized to achieve the maximum performance
available from a CCC glide, offering outstanding security, excellent glide and stability at all
speeds and outstanding sink rate and climb combined with precise and dynamic handling. The
Boomerang10’s precise handling allows the pilot to maximize climb rate in thermals, and the
high cruising speed with great glide and stability allows the maximum possible average speed
aroundcrosscountrytasks.
The Boomerang10 is optimized to go further in cross country and to win competitions, that
optimization requires it to be extremely effective in all aspects of cross country thermal
soaring, equally at home climbing in weak or strong thermals, racing along thermic ridges,
glidingat high speed across still alpinevalleys, or searching for elusive flatland thermals.
Cutting-edge Design
The Boomerang10 has been designed based on the experience we have gained from Gin’s
continuous development program, starting as soon as the Boomerang9 was released. That 2
year development program has resulted in a Boomerang 10 that is an improvement over the
Boomerang9 in all areas of flight performance. The Boomerang10 has better handling and
better climb, better glide and better stability (particularly at speed), and because of that

13 /48 Boomerang 10
improved stability the Boomerang10 has significantly higher certified top speed than the
previousmodel.
Theseimprovements result from adetailed analysisand deep understanding of the aerodynamic
and structural loads within the sail in flight and better matching of materials and loads. This
improved structural design applies both in the careful matching of cloth weight and stiffness to
varying loads in different areas of the sail, and in the new rigifoil structure of the
Boomerang10. The structural improvements provide substantial rigidity at the leading edge,
dramatically improving stability in turbulence, but they also allow a reduction in total line
consumption,whichleadstobetter glide, handlingandclimb.
These and other innovations make the Boomerang 10 the best glider available within the CIVL
CompetitionClass.
Manufacturing
All GIN gliders are produced in the company's own facilities using the most modern techniques.
Highly skilled staff take extreme care during the entire manufacturing process. Stringent
quality control is made after each step, and all materials that go into each wing can be traced.
These measures guarantee that pilots fly with the assurance that their wing meets the most
exactingsafetystandards.

Boomerang 10 14 / 48
3. Setting up the Boomerang 10 and test-flying
Before the first flight
WARNING Your instructor, dealer or a specialist must test-fly and inspect the paraglider
before your first flight. The test-flight must be recorded on the paraglider
information label. Any changes or improper repairs to this paraglider shall render
invalidthe certification andwarranty.
Brake line adjustment
Factorysetting
The brake lines of theBoomerang 10 are set to the length thatwas used for the CCC certification
test flights. These line lengths have been finely tuned by the GIN test pilots, and it should not
benecessaryto adjust them.
The brake line length is tuned so that there is slack in the brake lines when the glider is in fully
accelerated flight. Therefore, the brakes are quite slack at trim speed, and to take up that slack
in soaring flight, it is common to fly with half a wrap on the brakes and hold the handles on the
knot.However,careshouldbe taken to release the wraps inanyextreme situation.
If you do need to make adjustments to suit your harness, body and flying style, we strongly
recommend that you test fly the glider after every 2cm of adjustment. There should be a
minimum of 10cm of free brake travel when the glider is flown hands-off. This prevents the
brakes being applied unintentionally when the speed system is fully engaged. We recommend a
doublesheepshank or a bowline knot for the brake handleattachment as shown in thediagram.
Fig.1: Bowline knot
WARNING Loose, unsuitable or incorrectly tied brakelineknots cancausethe main brake line toloosen
andthenlead to loss of control of the glider.

15 /48 Boomerang 10
Incorrectadjustment
If the brake lines are too long, the paraglider reacts slowly and is difficult to land. The brake
lines can be adjusted during flight by wrapping them around your hands which will improve the
flightcharacteristics. Adjust the brakelinesto the correct length afteryouhavelanded.
Ifthebrakesareshortened, care must be taken thattheparaglider isnotslowed downintrim
andaccelerated flight. If the brakelines are tooshort, the following risks could arise:
therecouldbean early stall
the paraglider doesnot launch well and thereisa riskofdeepstall
theparagliderexhibits dangerousbehaviourinextreme flying
the trailing edge of the paraglider is braked in accelerated flight which, in an extreme
case,couldcause a frontal collapse
othersafetyissues may arise and performance may deteriorate
Speed System
The speed system increases the maximum speed by lowering the angle of attack with a pulley-
guided,foot-operatedsystem.
It is important to have your accelerator system correctly routed through your harness and
attached to the risers with the supplied Brummel hooks. The length of the speed bar should be
initially adjusted while on the ground, sitting in the harness so that the legs are fully extended
atthepoint of full acceleratortravel.Itishelpful to havean assistanthold the riserstaut while
makingthisadjustment.
Under CCC rules the risers have to include a limiter between the main A riser and the B riser, to
prevent acceleration beyond the certified top speed of the glider (the speed at which the glider
passed the CCC high speed flight tests). Many top pilots find that the optimum speed system
setup is to rig the system so that the limiters are just tight when the legs are comfortably fully
extended (knees locked) on the top bar of the speed system (if multiple steps are used). This
maximizes comfort and ensures that the speedsystem is symmetrically applied, and allows the
pilot to keep the wing fully accelerated while using the B-risers to steer the wing and control
pitchinturbulence.
Subsequent fine-tuning can be done on the ground following the first flight with the speed
system.Ifindoubtabout this procedure,consultyour instructor or dealer.
Certified Harnesses
The Boomerang10 is certified for use with all harnesses with variable cross-bracing (GH type),
such as the Gin Genie Race 3. Practically all modern harnesses are GH type harnesses. Older
harnesses with fixed cross- bracing (GX type) are not certified and should not be used. Check
with the manufacturer of the harness or your paragliding instructor if in doubt whether your
harnessisa GH or GX typeharness.
The adjustment of the harness chest strap controls the distance between karabiners and affects
the handling and stability of the glider. Excessivetightening the chest strap increases stability
but also the risk of twists following glider collapse, and it also increases the frequency of
getting collapses due to poor feedback from the glider. The risk of twisting is also strongly

Boomerang 10 16 / 48
affected by the seating position of pilot. Flying in a laid back (reclined) position makes it much
more difficult to react in time to prevent riser twisting. With the chest strap in a more closed
position the glider also has more tendency to maintain a stable spiral, lengthening of the chest
strapgivesmorefeedbackfromthegliderbutdecreases stability.
Gin Gliders calculates and draws the plan of the glider with a distance between the carabiners
of 44cm. CCC certification test flights are also carried out with this setting. We recommend
setting a distance of 42cm to 50cm between the carabiners, depending on the size and design of
theharness.
Reclined harnesses
Reclined harnesses are generally completely enclosed and often have a very low main
attachment point. Active flying is very different with them than with an upright harness. To
achieve the same level of efficiency and safety in flight with a reclined harness which you are
accustomed to with an upright harness, you must systematically learn the appropriate
techniquesand gain a gooddealof experience.
If any problems or disturbances are encountered when flying with a reclined harness, the pilot
must immediately assume an upright seating position. Extreme flight manoeuvres flown in a
reclined position drastically increase the risk of twist. In addition, pilots often underestimate
thereductionincontroltravelcausedby flying an extreme flight manoeuvre.
There is an increased riskof twist when using areclined harness if a large section ofthe canopy
collapses. If there is an asymmetric collapse and the pilot tips sideways, the resulting twist
around the vertical axis with a poorly positioned harness leads to a reduction in control travel.
Thisquicklycausesanunintended stall on the openside.
Reserve
It is a mandatory requirement to carry an approved reserve for use in emergency situations
where the paraglider fails and recovery is not possible, for example after colliding with another
aerial sports craft. In choosing a reserve, you should be careful that you remain within the
specifiedtake-offweight.Thereserveisfittedaccordingtothe manufacturer’s instructions.
Certified Weight Range
The Boomerang10 must be flown within the certified weight range given in the reference
section of this manual. The weight range is quoted as the total weight in flight, i.e. the weight
of the pilot, glider, harness and accessories. The easiest way to check your total weight is to
standonweighing scales withall your equipment packedintoyourrucksack.
First flight
Carry out your first flights only during stable weather, and in a familiar area or on a training
slope. You should steer gently and carefully to begin with so that you can become accustomed
tothereactions of the glider without stress.

17 /48 Boomerang 10
4. Flying the Boomerang 10
The Boomerang10 was developed for performance and competition pilots with extensive flying
experience. The basic types of flying described below should be second nature for such pilots,
buthavebeenincluded in this Manual for the sakeofcompleteness.
Preparation for launch
A careful pre-flight check is required for any type of aircraft. Make sure that you exercise the
same level of care each time carry out the check. Following a consistent method of preparation
andpre-flightchecksisvitalforsafeflying.Werecommendthefollowing:
On arrival at the flying site, assess the suitability of the conditions: wind speed and
direction,airspace, turbulence andthermalcycles.
Inspectyourglider,harness, reservehandleandpin,helmet and anyotherequipment.
Chooseasufficientlylarge take-off area with even ground and no obstacles.
Laytheglideroutaccordingtotheplanform,and get the linesand risers sortedout.
Putyourhelmet on. Secure yourself in your harness and don't forget the leg loops!
Connect the risers to your harness carabiners, ensuring there are no twists or loops
aroundthelines.
Connectthespeed system to the riserswiththeBrummelhooks.
Doafinal line checkbypullinggently on the risersor lines to ensurethere are no new
knots,tanglesor interfering branchesorrocks.Takeextracarein nilor light winds.
WARNING If there are obvious folds in the glider because it has been tightly packed or stored
away for a long time, then the pilot should carry out some practice inflations before
first launch and smooth out the trailing edge a little. This ensures that the flow
profile is correct during launch.It is particularly important in low temperatures that
thetrailing edge is smoothedout.
5-point check
The 5-point check is carried out immediately before launch to check once again the most
important safety points. It should alwaysbe carried outin the same sequence so that nothing is
overlooked.The5pointsare:
1. Is personal equipment correct (harness, carabiners, reserve, helmet) and are all
strapsdoneup?
2. Is thecanopy arranged in ahalf-moon shape and areall the air-entrances open?
3. Areallthelines untangled and areanylines underthecanopy?
4. Doestheweather, in particular wind direction and strength, allow asafeflight?
5. Aretheairspaceandlaunch area clear?

Boomerang 10 18 / 48
Launch
The key to a successful launch technique is to practice ground handling on flat ground whenever
you can. The Boomerang10 has good launch characteristics for its class, and no special launch
techniquesarerequired.
Light or nil wind launch
The Boomerang 10 inflates steadily in nil-wind conditions. Simply guide the glider by taking the
A1 and A2 main lines just above the A1 riser, keeping your arms bent and hands at the level of
the shoulders. Allow your arms to rise in an arc and wait for the glider to inflate and come
above your head -do not push the risers. There isno need to pull the risershard. Run positively
as the glider comes above your head. Be sure to look up and check that the glider is fully
inflated before you take off,and that there are no tangles in the lines. If anyirregularity should
occur and you are not yet airborne, abort the launch immediately by stalling the glider. On
steep launches, stall one side of the glider and run parallel to the hill.󳮁If the glider should come
up sideways, and the situation is recoverable, run towards the lower side rather than trying to
struggle against the force. An impulse launch where you start running with slack lines close to
thegliderisnot needed.
Strong wind launch
The Boomerang10 has good launch characteristics and no special techniques are required. The
reverse launch technique is recommended. Holding the brakes, turn around to face the wing
passing one set of risers over your head as you turn. We suggest building a "wall" by partially
inflating your glider on the ground, thus sorting out the lines thoroughly. Check the airspace is
clear and gently pull the glider up with the A1 and A2 riser. When the glider is overhead, check
it gently with the brakes, turn and launch. In stronger winds, be prepared to take a couple of
stepstowardsthe glider as itinflatesandrises.
Line knots or tangles
If you do take off with a line knot or tangle, try to get clear of the ground and any traffic before
taking corrective action. Weight shift and/or counter brake to the opposite side and pump the
knotted side with your brake. Be careful not to fly too slowly to avoid a stall or spin. If the knot
ortangleistootighttopumpout,immediatelyflytothe landing zoneandland safely.
Level flight and best glide
When the brakes are open, the Boomerang10’s flight is stable and level. The brake lines can be
used to adjust the speed according to the flight situation, to ensure the optimum level of
performance and safety. Flying too slowly close to stall speed increases the risk of an
unintentional asymmetric or full stall. This speed range should therefore be avoided and used
onlyonlanding.
The theoretical best glide speed in calm air is realized at the hands-off position. Minimum sink
is reached by pulling approx. 10 cm of brake. If the brakes are pulled more, the sink does not
reduce any further, the control pressures increase noticeably and the pilot reaches minimum
speed.

19 /48 Boomerang 10
Accelerated flight
Onceyouhavebecome accustomed to flyingthe Boomerang 10, you can practice usingthe speed
system, which allows improved glide in headwinds and greater penetration in strong winds.
When flying accelerated the glider reacts much faster to a collapse. Also the glider reacts more
radicallywhenacollapsehappensduring accelerated flightcomparedtoflyingattrimspeed.
Apply the speed system by pushing the speed bar progressively with your feet. Avoid flying
acceleratednear the ground, andbecarefulusing the accelerator in turbulence.
If you do encounter a collapse while using the accelerator, immediately step off the bar
completelybeforetakinganyothercorrectiveactions.
B-Riser control
The Boomerang10 responds very nicely to B-riser control. With the speedsystem applied the B
risers can be pulled backwards towards the pilot to directly control the angle of attack of the
glider. Pulling backwards pitches the wing nose-up, increasing the angle of attack, and reduces
the chordwise compression in the sail from the lines, making the wing more tuck-resistant. The
control movement is subtle and fluid, and only small movements are required. It is important to
recognize how much B-riser movement is needed to return the glider to trim speed. The riser-
limiters provide a good indicator of when trim speed is approached, making it clear when the
maillons are getting close to level (which is a sensible limit to the amount of B-riser control
that should be applied). B-riser control can be used to fluidly pilot the wing through turbulence
by controlling pitch. The aim should be to control pitch so that the wing stays directly above
you. B-riser control canalso be used for steering. It is good practice toalways glide with gentle
tension applied to the B-risers (pulling them backwards about 5cm) so that you can feel the
inputs from the wing. Those inputs warn you when turbulence is coming, but also allow you to
feel the lifty side of the wing – when the tension on the B-riser on one side increases, pull back
on that side to turn slightly towards the lifting air. Following lifting lines using the B-risers
this way can make a huge difference to flight performance and gives the Boomerang 10 pilot a
very satisfying feeling of being connected to the air movements. A pilot fully in tune with the
Boomerang10 can use these B-riser inputs to follow the lifty lines that lead to the cores of
thermals.
Turns
With the Boomerang 10, Gin Gliders has developed a glider which reacts immediately to
steering input and is extremely responsive. The Boomerang 10 performs best in turns when it is
flownwithsufficientspeedandweight-shifting. Toomuchbraking increases the sink rate.
The Boomerang10 has minimal negative tendency, but nevertheless the glider’s high aspect
ratio and dynamics on tight turns and centering near slopes take some time to get used to. You
should therefore maintain enough distance from slopes and observe safety margins during your
firstflightsuntil you are familiar with the Boomerang10’ssteering.

Boomerang 10 20 / 48
Ifmorebrakeisapplied,the bank attitudeincreases and the glider will fly a fast turnincreasing
in steepness, which will eventually become a spiral dive (further information on this is in the
section“SpiralDive”).
Losing altitude
Extremely strong and widespread lift is found, for example, in storm conditions. The best place
to be in this situation is on the ground. Nevertheless, if you have been caught out by the
weather and find yourself needing to descend rapidly, there are several ways to do so. The best
way is, of course, to find sink. Failing that, try one of the techniques below. Most of these
techniques place undue stress on your glider, and should be avoided if you want to extend its
lifetime. We recommend you initially practice these manoeuvres under qualified supervision
duringasafetytrainingcourse.
Big ears
It is possible to do big ears on the Boomerang10, but it takes great arm strength to hold in the
ears and the glider loses structure when the ears are in. Therefore the maneuver is not
recommended.
B3-Descent
To increase your sink rate, first apply a little speed bar (about 25%) and then pull in the (outer)
B3 lines simultaneously, firmly and progressively. To exit the manoeuvre, release the tips
simultaneouslyandprogressivelyandthenrelease the speedbar.
B-Stall
This manoeuvre is not possible with the Boomerang 10. For fast descent use a steep spiral or
B3-Descentasdescribedabove.
Spiral dive
The spiraldive isan extreme manoeuvre. Practice spirallingwith caution and lower sink rates to
get a feeling for the Boomerang 10’s behaviour. Weight shift and pull the brake on one side
gradually. Let it accelerate for two turns and you will enter the spiral dive. Once in the spiral,
you can control your descent rate and bank angle with weight shift and the outer brake. Spiral
dives induce large G forces, and these can disorient the pilot and stretch the glider lines and
sail.
The outer wing tip may collapse during the spiral dive although this is no cause for concern. It
canbeavoidedby lightly braking ontheoutside. Release the brakescarefully.
WARNING A pilot who is dehydrated and/or not accustomed to spiralling can lose
consciousness in a steep spiral dive! As with all types of aircraft, we advise you to
assist the gliderto exit from the spiraldive in acontrolled manner.
Toallowtheglider to exit froma spiral dive, your positionin the harnessmusteither be neutral,
or even better, on the opposite site of the turn while spiralling. If you release the inner brake
the wing will normally exit the spiral dive by itself. The Boomerang10 has no tendency to stay
in a stable spiral, but nevertheless, you should know how to exit from a stable spiral: