Gin Boomerang12 User manual

v1.0 March 2022

Boomerang 12 user manual
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
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 !"
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
#$$$%#&

Gin Gliders reserves the right to alter or add to the contents of this manual at any time. You
should therefore regularly visit our website:

where you will find additional information relating to your paraglider and any changes to the
manual. The date and version number of this manual are given on the front page.
© Gin Gliders Inc
The reproduction of this manual, including the partial reprint (with the exception of short quotations in technical articles), regardless of how or by
what means, electronic or mechanical, this is done, is only permitted with the express written permission of Gin Gliders Inc.
The data and information contained in these documents are subject to non-binding changes and may be changed without prior notice. The
provision of this manual does not claim to be the descriptions of the goods, names of use and trade, and other intellectual property.
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Boomerang 12 user manual
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Thank you ...
… for choosing Gin Gliders. This user manual contains important information for the use and
maintenance of your paraglider. Detailed knowledge of your glider and equipment will help you to fly
safely and make the most of your flights.
The manual complies with the EN airworthiness and forms part of the certification. There are no
special flying procedures and / or configurations apart from those detailed in this manual.
Your GIN paraglider has been designed to meet all safety and regulatory requirements. These
requirements also include the need to familiarise yourself with this user manual and the information
and instructions regarding safety, equipment and service prior to the initial commissioning. These
operating instructions must be fully read and understood before the first flight.
If you have any further questions about these operating instructions, please contact your GIN dealer
in the first instance, or Gin Gliders directly.
We wish you exciting flights and always a safe landing.
Your GIN team
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Boomerang 12 user manual
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Contents
 
Gin Gliders website 7
Gin Gliders and the environment 7
Respect for nature and the environment 7
Environmentally-friendly recycling 8
 
Safety advice 9
Safety notices 9
Liability, warranty exclusion and operating limitations 9
Liability and warranty exclusion 9
Operating limitations 10
Before the first flight 10
Harnesses 10
Reclined harnesses 11
Reserve 11
Weight range 11
Overload 11
First flight 12
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Preparation for launch 13
General warnings and advice 13
Material check 13
Pre-flight check 13
5-point check 14
Launching 14
Forward inflation 14
Reverse inflation 14
Tips for paragliding take-off 15
Towing 15
Attaching the towline release system 16
Knots or loops in the lines 16
In-flight characteristics 16
Normal flight 16
Accelerated flight 17
Turning 17
Active flying 17
B-riser control 18
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Boomerang 12 user manual
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Rapid descent techniques 19
Spiral dives 19
G-chute 20
B3-Descent 20
Big ears 20
B-Stall 20
Landing 20
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Dangerous situations 22
SIV / Safety training 22
Material stress 22
Canopy Collapses 23
Asymmetric collapses 23
Cravat / glider wrapped around lines 23
Symmetric collapses (Front stall) 24
Types of stall 24
Deep stall (parachuting, stable stall) 24
Full stall (dynamic stall) 25
Spin 25
Other tips for dangerous situations 26
Cascade 26
Emergency steering (rear riser steering) 26
Flying in the rain 26
Advertising and adhesives 26
Overloading 26
Sand and salt air 26
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Storing the paraglider 27
Packing the paraglider 27
Rucksack 28
Storing and transporting the glider 28
Care 29
Ground handling 29
Fabric
29
Lines 30
Rigid construction 30
Cleaning 30
Maintenance 31
Type designation 31
Regular inspections 31
Lines 31
Inspection periods 31
Validity of inspection 32
Line trimming 32
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Boomerang 12 user manual
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Repairs 33
Gin Gliders workshops 33
Small repairs to the glider 33
GIN quality and service 33
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Glider categories and guidelines 34
Glider category 34
EN/LTF certification 34
Description of flight characteristics 34
Suitability for training 34
Paramotoring 34
Tandem paragliding 34
Aerobatics 34
Description of pilot skills required 35
Target group and recommended flying experience 35
Normal flight requirements 35
Requirements for incidents and quick descents 35
Manufacturing and delivery 35
CCC Test-Lab-Template 35
Overall illustration 36
Technical data 36
Riser and speed system 37
Riser 37
Riser diagram 37
Riser lengths 38
Speed System 38
Line system and brakes 38
Line system 38
Folding lines 39
Brake line adjustment 39
Factory setting 39
Incorrect adjustment 40
Line layout 41
Materials 42
 
Glider details 43
Pilot details / Proof of ownership 43
Inspections and repairs overview 44
Notes 44
Addresses 45
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Boomerang 12 user manual
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Gin Gliders
In forming Gin Gliders, designer and competition pilot Gin Seok Song had one simple dream: to make
the best possible paragliding equipment that pilots all over the world would love to fly - whatever their
ambitions.
At Gin Gliders, we bring together consultant aerodynamicists, world cup pilots, engineers and
paragliding school instructors, all with one goal: creating better paragliders.
We’re a “hands-on” company that puts continuous innovation and development at the centre of
everything we do.
At our purpose-built R&D workshop at the 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 thoroughly tested to
cope with the toughest flying conditions.
Our own production facilities in East Asia ensure the quality of the finished product and also the
well-being of our production staff. Our facilities are independently certified to AS9100C (Aerospace
standard) and also to ISO 9001:2008.
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, performance and fun.
The grin when you land should say it all!
Gin Gliders website
Gin Gliders has a comprehensive website, which provides additional information about the
Boomerang 12, any updates to the manual and many other issues related to paragliding.

On the Gin Gliders website, you will find an extensive range of accessories for your paraglider and
other useful products.
You will also find links there to other services and websites:
●Gin Gliders Shops
●Facebook, Instagram, Twitter and 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 reserves the right
to alter the websites at any time or to block access to them.
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 environmental
awareness.

You can easily play a part in protection of the environment by practising our sport in such a way that
there is no damage to nature and the areas in which we fly. Keep to marked trails, take your rubbish
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away with you, refrain from making unnecessary noise and respect the sensitive biological equilibrium
of nature. Consideration for nature is required even at the launch site!
Paragliding is, of course, an outdoor sport – protect and preserve our planet’s resources.

Gin Gliders gives consideration to the entire lifecycle 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 to the address given in
the appendix.
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Boomerang 12 user manual
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Safety
Safety advice
Paragliding demands 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 accidents with paragliders are caused
by pilots misjudging the weather for flying.
Paragliders are subject to specific guidelines for air sports equipment in each country. They must
not under any circumstances be flown without a valid certification. It’s your responsibility to know and
observe the regulations of the region where you fly. 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
certification and belongs with the paraglider.
Observe the other specific safety advice in the various sections of this manual.
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 affected gliders
can be inspected for possible faults and the steps required to rectify them.
Gin Gliders publishes on its website any technical safety notices which are issued in respect of GIN
products. The paraglider owner is responsible for carrying out the action required by the safety notice.
Liability, warranty exclusion and operating limitations
Use of the paraglider is at the pilot’s own risk!
The manufacturer cannot be held liable for any personal injury or material damage which arises in
connection with Gin Gliders paragliders.
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 and must
observe the relevant regulations in each country.

In terms of the warranty and guarantee conditions, the paraglider may not be flown if any of the
following situations exists:
●changes of any kind (incl. paraglider design or changes to the brake lines beyond the
permissible tolerance levels)
●incorrect repairs to the glider
●the inspection period has expired, or the inspection has been carried out by the pilot
him/herself or by an unauthorised inspector
●the pilot has incorrect or inadequate equipment (reserve, protection, helmet etc)
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Boomerang 12 user manual
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●the glider is used for winch-launching with a winch which has not been inspected or by
non-licensed pilots and/or winch operators
●the pilot has insufficient experience or training
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The paraglider must be operated only within the operating limits. These are exceeded, if one or more
of the following points are complied:
●the take-off weight is not within the permissible weight range
●the glider is flown in rain or drizzle, cloud, fog and / or snow
●the canopy is wet
●there are turbulent weather conditions or wind speeds on launch higher than 2/3 ot the
maximum flyable airspeed of the glider (varies according to the total take-off weight)
●air temperature above 50°C and extremely low temperatures, which can lead, in combination
with moisture, to icing
●aerobatics
●modifications to the canopy, lines or risers which have not been approved
Before the first flight

The Boomerang 12 is certified for use with all harnesses with variable cross-bracing (GH type).
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 harness is a GH or GX type harness.
It’s important for your comfort and safety to fly with a suitable harness that is properly adjusted.
When choosing a harness, remember that the height of the attachment points (i.e. distance from the
carabiners to the seat plate) affects the sensitivity of the glider and the relative brake travel. The lower
(shorter) the attachment points, the more sensitive the glider is to weight-shift.
The adjustment of the harness chest strap controls the distance between carabiners and affects the
handling and stability of the glider. Excessive tightening of the chest strap increases stability but also
the risk of riser twists following glider collapses. It also increases the likelihood of getting collapses
due to poor feedback from the glider. The risk of twisting is also strongly influenced by the seating
position of the 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. With the chest strap in a more open position, feedback from the
glider is increased but stability is decreased.
GIN gliders are developed with GIN harnesses, which have an attachment point of approximately
40-48 cm (depending on size and model). EN/LTF as well as CCC certification test flights are carried
out with the horizontal distance between the harness attachment points (measured between
connector centrelines) set depending on the total weight in flight as follows:
  

Width 40 ± 2 cm 44 ± 2 cm 48 ± 2 cm
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Boomerang 12 user manual
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We recommend initially adjusting the distance of the chest strap according to the table. Then if
necessary, make slight adjustments. In general, the carabiner distance should not be set too narrow!
For flight comfort and safety it is very important that you fly with a suitable, properly adjusted
harness. In practice, it turns out that few pilots have a harness that suits their flying style and
paraglider. If you have any questions or doubts regarding the use of your harness with the
Boomerang 12, please contact a GIN dealer or Gin Gliders directly.
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 techniques and gain a good deal of
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 the reduction in
control travel caused by flying an extreme flight manoeuvre.
There is an increased risk of twist when using a reclined harness if a large section of the 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. This quickly causes
an unintended stall on the open side.
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 specified take-off weight. The
reserve is fitted according to the manufacturer’s instructions.
Be sure to fly your glider within the certified weight range given in the Technical Specification section.
The weight refers to take-off weight: pilot, incl. clothing, glider, harness and equipment.
The reactions are quite different at the upper- or lower weight range. If you fly at a high wing-
loading, the glider shows dynamic flight behaviour with fast reactions. This may be an advantage in
strong wind conditions, but considerable pilot skill is required.
The dynamics are reduced somewhat in the middle and lower part of the weight range.
The EN 926-2:2015 and CCC 2020 describes the weight measurement with: “All weights are subject
to an acceptable tolerance of ± 2kg”. Therefore a slight overload of the wing would be within EN/CCC
tolerances. However, flying over the maximum weight further increases the dynamic flight behaviour.
In small bubbles, the wing has more horizontal momentum and less tendency towards lifting. A test
flight is always recommended if in doubt.
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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 invalid the certification and warranty.
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 to the
reactions of the glider without stress.
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Flying the Boomerang 12
The Boomerang 12 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, but
have been included in this manual for the sake of completeness.
Preparation for launch
Follow a consistent routine every time you fly. This is very important for safety. We recommend the
following procedure:

Before flying, check the following:
●Are you in good physical and mental condition?
●Are you familiar and compliant with all applicable laws and regulations in your area?
●Are you within the certified weight range?
●Do you have the necessary insurance cover?
●Are you briefed thoroughly about the site, airspace and expected weather conditions of the
day?
●Is your equipment and choice of site suitable for your level of experience?
●Do you have a suitable helmet, gloves, boots, eyewear and adequate clothing?
●Are you carrying some form of identification, in case of an accident? Take along a radio and
mobile phone if possible.
●Do you fully understand how to safely fly your new wing? If not, have your instructor or dealer
explain anything you are not sure about.

Check the following condition of your paraglider and other flying equipment before every flight:
●Is the glider fabric free from tears or other damage?
●Are the lines free from knots, tangles or other damage?
●Are the brake lines freely and firmly connected to the handle?
●Is the brake line length correctly adjusted?
●Are the maillons connecting the lines and risers closed and secured?
●Is the glider dry?
●Are the risers and carabiners in good condition?
●
Is your harness in good condition?
●Is your rescue handle secure and rescue pin in?

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.
●Once you have arrived at the take-off, you should first take a look at the conditions: observe
wind speed and wind direction, airspace, turbulence and thermal cycles.
●Check your paraglider, harness, rescue handle and pin, helmet and other equipment.
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●Choose a wide starting place, as uniform as possible and free from obstacles.
●Put on your harness and be sure to close the leg straps! Then put on your helmet.
●Place the paraglider in a curved shape and sort the lines.
●Connect the riser to the harness carabiners. Make sure that the carabiners are closed and
that nothing is twisted.
●Connect the speed system of the riser and harness with the Brummel hooks.
●Check one last time that there are no knots in the lines, nothing is twisted and that the lines
are not caught in vegetation or rocks. You must be particularly attentive in lighter winds.
The 5-point check is carried out immediately before launch to check the most important safety points
once again. It should always be carried out in the same sequence so that nothing is overlooked. The 5
points are:
1. Is your personal equipment in order (harness, carabiners, reserve, helmet), all straps done up?
2. Is the canopy arranged in a half-moon shape and are all the air intakes open?
3. Are all the lines untangled and are any lines under the canopy?
4. Does the weather, in particular wind direction and strength, allow a safe launch?
5. Are the airspace and launch area clear?
Launching
The key to a successful launch technique is to practice ground handling on flat ground whenever you
can. The Boomerang 12 has good inflation and launch characteristics for its class, and no special
launch techniques are required.
We recommend a forward inflation only in nil winds. Pull up the glider with the lines stretched. It is not
necessary to use any momentum to launch the Boomerang 12 and/or to start running with slack lines.
Lean forward positively and guide the ‘A’ risers smoothly upwards in an arc, keeping your elbows
bent and hands at the level of the shoulders. The Boomerang 12 will inflate easily—there is no need to
aggressively pull or push the risers. As the glider comes above your head, make sure that the canopy
is correctly inflated, and that there are no knots or tangles in the lines before you decide to take-off. If
you see a disturbance, do not launch. Immediately abort the take-off by stalling the paraglider. If the
slope is steep, then just pull through one brake completely and run parallel to the slope.
The Boomerang 12 is suitable for reverse inflation in light to strong winds. We suggest that you
partially inflate your canopy, which allows you to untangle the lines. Make sure the lines are free from
knots or tangles. Check that the airspace and visibility are clear. Gently pull up the glider in an arc with
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the ‘A’ risers. When the glider is overhead, brake it gently if necessary, turn around and launch. If the
wind is very strong, it is recommended to make a few steps toward the wing when inflating.
This method of inflation makes it easier for the pilot to control the rising of the canopy and is
therefore recommended in strong winds.
●If the glider comes up slightly off-centre, make small corrections by moving towards the lower
side.
●In stronger winds, be prepared to take a couple of steps towards the canopy as it inflates and
rises.
●Launch the wing by pulling upwards in an arc, not towards you.
●Practice ground-handling regularly to improve your take-off skills!
●The pilot must work actively to keep the glider on the ground in higher winds (wind speeds
from approximately 6 m/s), otherwise the glider may rise above the pilot unintentionally.
Inflate the glider facing the direction of take-off. Laying out the glider on the ground in the shape of an
arc helps ensure a smooth inflation. This significantly reduces the need for corrections and thus
enables a controlled and safe start.
After the canopy has been pulled up to its highest point, the pilot rises from the ground by the
tension of the tow line. Under no circumstances should the “start” command be given before the
glider is completely under control.
Any changes to direction using the brakes should not be carried out until the canopy is already above
the pilot, as too much brake can cause the glider to fall down again or be towed in a non-flyable
condition.
Major changes to direction should be avoided during the launch phase and before reaching a safe
altitude. After having left the ground, the pilot will be slowly towed in a flat angle up to the safe
altitude of 50 m. During this phase, the pilot must remain ready to run and must not sit back in the
harness, so that it is possible to land safely in the event that the winch or tow rope fails. Ensure that
the glider is flown with open brakes so that the angle of attack is not increased further by the brakes.
On a winch launch, the glider should if possible be steered only by weight-shifting. Brisk, forceful
steering input with the brakes can be used to help correct direction, without braking the glider too
much and stalling it.
Towing requires special training and special regulations must be observed. These are:
●The pilot must have completed the appropriate training and hold a licence.
●The winch and release must have a certificate of compliance which covers the towing of
paragliders.
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●The winch operator must have undertaken training which includes the towing of paragliders.
●The Boomerang 12 may not be towed with more than the permissible towline tension.
●The paraglider must not under any circumstances be towed by motor vehicle or motor boat
etc if you do not have the appropriate towing equipment and a suitable winch operator.
The optimal attachment point for the towline release should be as close as possible to the system’s
centre of gravity. On a paraglider the ideal attachment point is level with the harness attachment point
or directly on the risers. It is not essential to use a suitable tow adaptor, but it is recommended as it
provides the pilot with greater safety during the towing phase.
Gin Gliders offers a safe, lightweight and easy tow release system, “Towing bridle”. It attaches to the
main carabiner and engages the speed system to enhance takeoff safety and climb performance. It is
a two piece tow bridle for use with front mount reserves – with a three ring release. The bridle utilizes
a straight pin which is preferred for reverse inflation style launches as the odds of a premature release
are greatly reduced over curved pin systems.
If a webbing release system is used, there is an increased risk of lockout. This means that the glider
does not fly towards the winch and control pressure by the pilot is not sufficient to correct this. You
should therefore regularly check the position and alignment of the glider to the pilot during towing, as
the towing rope hangpoint located well in front of the pilot encourages the glider to turn, and this may
not be detected.
If you have taken off with a knot in the lines, you should wait until you have enough height and
distance from other pilots before you attempt to loosen the knot. Control with weight-shift and gently
brake the opposite side before attempting to open the knotted side by pulling on the brake line. Make
sure you don’t fly too slowly and stall or spin the paraglider. If the knot does not open, land safely as
soon as possible.
In-flight characteristics
“Trim speed” (brakes fully released) is the best glide speed in still air. The brake lines are used to
adjust the speed according to the flight situation in order to ensure optimum performance and safety.
Minimum sink speed on the Boomerang 12 is achieved by light braking. In a normal flying position
(knees parallel to the ground and your body slightly reclined), your hands should be holding the
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brakes at a level between your eyes and your shoulders. Use this speed for thermalling and ridge
soaring.
Stall speed is approached by bringing your hands towards your hips. Notice the decreased wind
noise and a significant increase in brake pressure.
Once you have become accustomed to flying the Boomerang 12, you can practice using the speed
system, which allows improved glide in headwinds and greater penetration in strong winds. During
your first few flights, familiarize yourself with your glider’s speed range and corresponding brake
positions and pressures.
It is important to remember to release any wraps on the brakes when using the speed system. The
brake length on the Boomerang 12 has been finely tuned to avoid any deflection on the trailing edge
through the brake during accelerated flight. Applying brake while using the speed system degrades
performance and increases the chance of collapse.
When flying accelerated the glider reacts much faster to a collapse. Also the glider reacts more
radically when a collapse happens during accelerated flight compared to flying at trim speed.
Apply the speed system by pushing the speed bar progressively with your feet. Avoid flying
accelerated near the ground, and be careful using the accelerator in turbulence. If you do encounter a
collapse while using the accelerator, immediately step off the bar completely before taking any other
corrective actions.
The Boomerang 12 performs best in turns when it is flown with sufficient speed and weight-shifting.
Enter a turn with good airspeed, weight-shift and then apply the brake. Once established in the turn,
regulate your speed and turn radius with weight-shift and the outer brake. Too much braking
increases the sink rate.
Make your first turns gradual and progressive. Also remember that your harness and its set-up has
an influence on the turning behaviour of the wing. The Boomerang 12 has extremely low negative
tendency, so it can also be turned in a tight area by carefully pulling the inside brake line.
If the brakes are applied more, the bank attitude increases and the glider will fly a fast turn
increasing in steepness, which will eventually become a spiral dive (further information on this is in the
section “Spiral Dive”).
Practice active flying to eliminate collapses in all but the most turbulent conditions.
Keep tension on the brakes approximately equal to the weight of your arms. This allows you to stay
relaxed and sensitively feel the internal pressure in the wing through the brakes. If you feel a loss of
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pressure in one or both sides of the wing, quickly apply the appropriate brake(s) to regain pressure.
Release the brake promptly as soon as normal pressure is resumed.
If you miss the above timing and get a collapse, be sure to first raise your hands and release the
brakes before considering any other corrective actions.
The Boomerang 12 has excellent pitch stability. Nonetheless, in turbulence or during manoeuvres,
the glider may pitch. If the glider pitches in front of you, apply brake to slow it down. If the glider drops
behind you, ease off the brakes to allow it to speed up. The objective is to reduce the pendulum
effect by adjusting the speed of your glider so that glider and pilot are travelling at the same speed.
The same general principles also apply when gliding on bar.
Summary: "Active flying"
●The pilot sits upright in his harness, his view goes in the direction of the flight.
●He constantly responds to increasing and decreasing brake pressures with the aim of
maintaining a constant pressure on the brake lines.
●The further in front of you the glider pitches, the larger the brake input required, but for a
shorter duration.
●When brake pressures decrease, brake firmly; when brake pressures increase, ease off the
brakes.
The Boomerang 12 responds very nicely to B-riser control to fluidly pilot the wing through turbulence.
The aim is to control pitch so that the wing stays directly above you. B-riser control can also be used
for steering.
Following lifting lines using the B-risers can make a huge difference to flight performance and gives
the Boomerang 12 pilot a very satisfying feeling of being connected to the air movements. A pilot fully
in tune with the Boomerang 12 can use these B-riser inputs to follow the lifty lines that lead to the
cores of thermals.
With the speed system applied, the B risers can be pulled downwards to directly control the angle of
attack of the glider. Pulling downwards pitches the nose up, which increases the angle of attack and
reduces the chordwise compression in the sail from the lines. This makes the wing more
tuck-resistant.
If you use B-riser control keep the brake handles in your hand and loosen any wraps of the brake
line. The control movement is subtle and fluid – only small movements are required. It is important to
recognize how much B-riser movement is needed to return the glider to trim speed. It is good practice
to glide with gentle tension applied to the B-risers (pulling them downwards about 3 to 5 cm) 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
down on that side to turn slightly towards the lifting air.
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Rapid descent techniques
Many flying situations call for a very rapid descent to avoid a dangerous situation, e.g. the up current
from a cumulus cloud, an approaching cold front or a storm front.
Rapid descent methods should all be practised in calm conditions and at sufficient altitude so that a
pilot is then able to employ them effectively if extreme conditions arise. Rapid descent techniques are
divided into three different manoeuvres which increase the sink rate in a safe and controllable
manner.
B3 descent and spiral dives are generally the most common methods of descent for competition
wings. B3 descent can achieve a moderate rate of descent with the advantage of forward speed and
manoeuvrability. Spiral dives attain higher rates of descent, but the g-forces can be significant and the
manoeuvre is more technically demanding.
All of these options will also strain your paraglider and should be avoided if you want to preserve
your paraglider.
The spiral dive is the most effective, but also the most demanding, method for making a rapid
descent, and can allow sink rates of up to 20 m/s to be reached. It is suitable where there is a high
ascent rate and little wind.
The Boomerang 12 fulfils the CCC spiral dive requirements. The certification test flights are carried
out with a defined carabiner distance (see chapter "Harness"). Deviations from this setting,
unapproved harnesses or spirals with excessive sink can change the maneuver considerably; pilot
action may be required. In such cases, exit the spiral by weight-shifting to the outside and
progressively applying the outside brake.
Before entering a spiral, make sure you have adequate height for recovery. To enter the spiral dive,
weight-shift and progressively apply the inside brake until the glider enters the spiral. As the glider
accelerates into the spiral, centre your weight and control your rate of descent with weight-shift and
outer brake.
To exit the spiral, check your weight is centred (or slightly towards the outside) and progressively
release the inside brake. As the glider starts to exit the spiral, you may also choose to reduce the
pendulum moment by briefly re-applying the inside brake.
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



The “G-chute” safety device is a small “Anti-G”-type drag parachute that reduces the high
G forces which may occur during the descent in a spiral dive. This enables the pilot to achieve a
higher rate of descent with fewer turns and allows safer spiral descents by reducing
G forces in a spiral dive.
The G-chute is simple and easy to use and usually connected to a carabiner on the harness. It is
deployed before the spiral and pulled back after the manoeuvre is finished and stowed away in the
harness.
The Genie Race harness, specially developed for XC and competition flights, has an additional
pocket and bridle connecting for the use of the G-chute.
 
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 simultaneously and
progressively and then release the speedbar.

It is not recommended to do big ears on the Boomerang 12. The manoeuvre is technically possible,
but it takes great arm strength to hold in the ears and the glider loses structure when the ears are in.
Furthermore, the thin Aramid lines can damage the fabric.
!
This manoeuvre is not possible with the Boomerang 12. For fast descent use a steep spiral or
B3-Descent as described above.
Landing
Land on a large and obstacle-free landing site. Fly a straight final approach at trim speed into the
wind. About one meter above the ground, pull both brakes smartly about half the control distance (30
to 40 centimeters), which allows the wing to pass into a short, almost ground-parallel glide (level flight
path). Immediately before touching the ground, both brakes are then pulled completely.
The weaker the headwind, the more energetic and deeper the final braking must be. In the case of
stronger headwinds, the final braking must not be too abrupt. In very strong winds, the brakes are not
pulled down completely to avoid the glider climbing rapidly upwards and backwards. Instead, turn to
face your wing as soon as your feet touch the ground without pulling the brake.
Stall the glider as rapidly as possible with the rear risers. Be prepared to run towards your wing.
Never perform spirals or steep turns near the ground. This may cause the pilot to pendulum
dangerously.
Before landing, you should slip out of the seat board of the harness and assume an upright position.
Never land without first getting up; landings on the backside are dangerous and can lead to injuries
even if you use a good back protector.
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