Bruce Goldsmith Design LUNA User manual

Rev_01_29.05.2013 Bruce Goldsmith Design GmbH, Hügelweg 12, 9400 Wolfsberg, Austria 1
BRUCE GOLDSMITH DESIGN
LUNA EN-C Paramotor

Rev_01_29.05.2013 Bruce Goldsmith Design GmbH, Hügelweg 12, 9400 Wolfsberg, Austria 2
LUNA
Owner’s Manual
Paramotorglider EN C
CONTENTS
Introduction Page 3
Colour Options Page 3
Quick summary Page 4
Preparation Page 5
Preflight Inspection Page 5
Flight Characteristics Page 6
Rapid descent manoeuvres Page 8
Recovery Techniques Page 9
Storage & Servicing Page 10
Technical data Page 11
Line Diagramm Page 12
Line length and materials Page 13
Trimmer riser description Page 14

Rev_01_29.05.2013 Bruce Goldsmith Design GmbH, Hügelweg 12, 9400 Wolfsberg, Austria 3
Introduction
Welcome to Bruce Goldsmith Design.
BGD is a world leader in the design and production of free flight equipment. For many years BGD have
developed 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
customer’s value and respect. BGD pilots confide on our quality and reliability.
BGD´s world class status is based on the skills and expertise we have developed in combining aerodynamic
design, 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
airports.
As a Pilot of an BGD LUNA paramotor glider you have chosen one of the safest aircraft of its type available
but it must be understood that flying can be a dangerous activity Properly trained people flying in a
responsible and disciplined manner should only do it.
Congratulations on your purchase of the BGD LUNA.
The LUNA is the high quality Paramotor wing, 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 first to
the last chapter to ensure you get the best out of your LUNA.
This manual has been prepared to give you information and advice about your paramotor glider. If you ever
need any replacement parts or further information, please do not hesitate to contact your nearest BGD
dealer or contact BGD directly.
Colour Options

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Quick Summary
When you pull the trim tab the trimmer automatically adjusts itself to the neutral position with all riser level.
This is the best position for launch and landing.
Launching is best done by pulling just the main A risers without the big ears risers.

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General
The LUNA is an easy to fly paramotor glider suitable for intermediate and expert pilots. Exceptional stability
and passive safety combined with speed, excellent handling and good performance make this a wing, which
is real pleasure to fly.
This paramotor glider must not:
-be flown with more than maximum certified total load
-have its trim speed adjusted by changing the length of risers or lines.
-perform aerobatic manoeuvres
-Exceed 60 degrees of bank angle
-be flown in rain or snow
-be flown in strong turbulence, unstable air or higher wind conditions
Preparation
1) Select a suitable take-off area determined by wind and terrain, clear of any obstacles that may catch in the
lines or damage the canopy.
2) Unroll the canopy so that the paramotor glider has the bottom surface facing upwards, the openings at the
downwind end of the take-off area, the trailing edge and the risers at the upwind side.
3) Unroll the canopy to each side so that the leading edge openings form a semi-circular shape, with the
trailing edge drawn together as the centre of the arch. The risers should be drawn away from the canopy
until the suspension lines are just tight.
4) Check your Paramotor and engine and get it ready according to the manufacturer’s advices
5) Very high attention must be paid to the danger of injury to the pilot and bystanders from a rapidly rotating
propeller, which can break and inflict injury at some distance and the dangers inherent with flammable fuel
and other combustible or fusible materials.
Pre-flight Inspection
The LUNA is designed to be as simple as possible to inspect and maintain but a thorough pre-flight
procedure is mandatory on all aircraft. The following pre-flight inspection procedure should therefore be
carried out before each flight.
1) Whilst opening out the paramotor glider check the outside of the canopy for any tears where your
paramotor glider may have been caught on anything like barbed wire or even have been damaged whilst in
its bag.
2) Check that the lines are not twisted or knotted. Divide the suspension lines into eight groups, each group
coming from one riser. By starting from the riser and moving towards the canopy remove any tangles or
twists in the lines. Partially inflating the canopy in the wind will help to sort out the lines.
3) 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 an assistant holding the upper end of the brake lines
together can check this, whilst the pilot holds the brake handles. The length of the brake lines should be such
that they are just slack with the wing inflated when the brakes are not applied; Do the same with the lines of
the "tip steering system". After checking the brake lines lay them on the ground.
Both risers should have the trimmers in the recommended take-off position.

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4) Always check the buckles and attachments on the harness and Paramotor. Ensure the two main
attachment maillons/karabiners from the harness to the main risers are tightly done up, as well as the eight
shackles which attach the risers to the lines.
5) Before the pilot attaches himself to the harness and paramotor he should be wearing a good crash helmet,
and boots, which provide ankle support. Put on the harness ensuring all the buckles are secure and properly
adjusted for comfort. Your paramotor glider is now ready for flight.
6) The engine should be warm and able to deliver full power.
Flight Characteristics
This manual is not intended as an instruction book on how to fly the LUNA, you should be a qualified pilot or
under suitable supervision, but the following comments describe how to get the best from your LUNA.
Take-off
The LUNA is easy to inflate in light or stronger winds and will quickly rise overhead to the flying position. The
best inflation technique is to hold only the central Arisers.
Bring the trimmers on the correct position pushing down on the appropriate ring(installed on the belt of the
trimmer) until it arrives at the stroke end.
a) Nil Wind –Inflation is best done by taking only the central A risers in each hand. In nil or very light wind,
stand with all the A lines taut behind you, then take one or two steps back (do not walk all the way back to
the canopy) and then begin your launch run pulling gently and smoothly on the A risers. As soon as the
canopy go beyond the 45° of rotation, increase the throttle up to 30% of that required to take off so allow at
the engine thrust to assist the canopy to reach the overhead position. Maintaining gentle pressure on the A
risers always helps in very calm conditions. Have your hands ready to slow down the canopy with the brakes
if it starts to accelerate past you.
During the take-off run is important not to lean forward but stay straight and lean on the engine thrust.
b) Reverse Launch –In winds over 10 km/h it is better to do a reverse launch and inflate the canopy whilst
facing it using the central A risers.
Never attempt to take off with a glider that is not fully inflated, directly overhead or if you are not fully in
control of the pitch/roll of the wing.
Climb
Once in the air you should continue flying into wind whilst gaining altitude. By setting the trimmers to the
take-off position you will achieve a good climb rate. Do not attempt to climb too steeply or too quickly by
using the brakes. If you use the brakes plus the engine’s full thrust acting on the pilot, this could contribute to
make the glider more prone to stall. Furthermore, in the event of an engine failure the resulting backward
pendulum motion of the pilot and the forward dive of the wing may bring you back to the ground very hard.
Do not initiate turns until you have sufficient height and airspeed.
Under certain circumstances it is possible for the pilot to induce oscillations. This is caused by a combination
of the engine/propeller torque and pilot weight-shift and/or brake inputs. To stop oscillations it is best to
reduce the power slightly and ensure that you remain static with weight-shift and brake inputs. Once settled,
you can once again apply full power.
Straight Flight
Once you have gained safe height after take-off and wish to fly a distance, you can turn onto the right
direction, fully open the trimmers and let off the brakes.
The reflex wing aerofoil enables to use a wide range of trimmers and speed-system action. Fully opened
trimmers and maximum speed-bar increase the speed and stability of the wing. In this configuration it is

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better to use the "tip steering system" than the brakes so as to achieve a more efficient turn and not to loose
stability characteristics of the reflex profile.
It is advised to use the speed-system with fully or half opened trimmers.
For an efficiently use of the thermals, the trimmers should be setting in slow position (certified) to decrease
sink and steering forces.
Active Piloting
Active piloting is a flying technique that will help you fly with higher safety and enjoyment. Active piloting is
flying in empathy with your paramotor glider. This means not only guiding the glider through the air but also
being aware of feedback from the wing, especially in turbulence. If the air is quite smooth, the pilot should fly
without acting on the brakes, the reflex profile ensure the stability of the wing but when accounting some
stronger turbulence feedback should be continuous and needs to be assessed by the pilot through the
brakes and the harness. The LUNA is highly resistant to collapse without any pilot action at all, but learning
how to fly actively will increase this safety margin even further. It is not allowed to fly the paramotor glider in
strong turbulence or high winds. This may spin, cravatte or collapse the paramotor glider and may make it
uncontrollable resulting in a crash which may hurt or kill the pilot.
Maximum symmetric control travel at maximum weight in flight is 70 cm.
Turning
The first turns should be gradual and progressive, the first input for directional change should be weight-shift,
followed by the release of the outer brake and a smooth pull on the inner brake until the desired bank angle
is achieved. To regulate the speed and radius of the turn, coordinate your weight shift and use the outer
brake.
Never initiate a turn at minimum speed or under full power in a steep climb as you may risk entering a
dangerous spin .
Tip Steering System
To use the "tip steering system" first locate the main brake handles onto their keepers (to avoid tangles) then
use the small handles for directional control. Turns executed in this way will be slightly wider, but strength
needed to initiate the turn will be smaller and there will be no decrease in speed.
You can also use both commands together, holding the main break in each hand move a finger inside the
ring of the small handles of the tip steering control, in this way the turns are tighter. The latter technique is
recommended by BGD in case of turbulence and flying near the ground because, with the main brakes in the
hands, the pilot can react readily should an incident occur.
For take-off or landing and In stronger turbulent air only the main brakes should be used.
Landing
Bring the trimmers on the correct position pushing down on the appropriate ring (installed on the belt of the
trimmer) until it arrives at the stroke end.
Flying downwind of the landing field at an appropriate distance (longer if the wind is weak and less if the wind
is strong) from the preferred touch down point (aiming point) with an altitude of about 40 meters, turn into the
wind bring the engine to idle and glide heading towards the predetermined place for landing. At this point, if
you are sure of being able to land safely in the predetermined place, you should switch off the engine,
otherwise you should increase the throttle and make a go around and repeat the approach.
When sure for landing switch off the engine, fly your final descent with speed until you are a little more than
a meter above the ground. Apply the brakes slowly and progressively to slow the glider down until the glider
stalls and you are able to step onto the ground.
If you land with the engine running there is a considerable risk of damage propeller, catch lines in it or even
suffer injuries.

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Rapid descent maneuvers
BGD must point out that these manoeuvres should only be learnt under the supervision of a qualified
instructor and always used with caution. Please keep in mind that properly analysing the conditions before
launch will help avoid the need to use these techniques.
Wing Tip Area Reduction (Big Ears)
The ‘baby A riser’ allows the LUNA to be ‘big eared’. The big ear device does not allow you to fly in stronger
winds, but is a device which allows the pilot to descend quickly without substantially reducing the forward
speed of the canopy (as is the case with B lining). To engage big ears the pilot will grasp the ‘baby A riser’
(one in each hand) at the karabiner and then pull the riser out and down until to collapse the tips of the glider.
It is very important that the other Alines are not effected when you do this as it could cause the leading edge
to collapse. Steering is possible by weight shifting with big ears in. If the big ears do not come out quickly on
their own then brake gently one side at a time until tips regain pressure.
Never try to pull big ears during powered climb, as can lead to increase of the angle of attack and a
dangerous parachutal stall.
Never try to pull the Big Ears in with the speed bar on already. This can lead to a major asymmetric deflation.
Do not combine Big ears and spiral dive as the high forces applied to the lower lines could exceed the
breaking strength of the lines leading to equipment failure!
B-Line Stall
For emergency situations only is B-Line stall a fast descent method. With both hands through the brake
handles, the pilot takes hold of the top of the B risers, one in each hand, and pulls them down. Executing a
B-stall on LUNA is hard due to specific suspension lines location in stabilizers area.
This will stall the canopy and forward speed will drop to zero and the descent rate should be around 6 m/sec.
When pulling the B-Lines too far the glider may horse shoe and start to oscillate a lot. Make sure you have
plenty of height. For exiting the B-Line stall you should release the B riser fairly quickly as the pitching
movement of the canopy is necessary to get it flying properly again - releasing too slowly may result the
glider entering a deep stall. Always release the riser symmetrically as an asymmetric release from a B line
stall may result in the glider entering a spin.
The pitching movement on exiting the B stall is small but necessary. We recommend you do not apply brake
to the glider until you are sure that the wing is flying fully again; let the reflex profile to dampen the movement
of pitch.
This manoeuvre is useful when losing a lot of height quickly is necessary, perhaps when escaping from a
thunderstorm. It should not be performed with less than 100 m of ground clearance.
Spiral Dive
A normal turn can be converted into a strong spiral dive by continuing to apply one brake. The bank angle
and speed of the turn will increase as the downward spiral is continued. Once in the spiral you must apply a
little of outside break to keep the outer wing inflated and pressurized. No spirals with descent rates of more
then 8 m/sec should be executed –even then but you will enter high G-Forces which may be disorientating
and stress your body - also pay high attention on the altitude. LUNA is a very agile paramotor glider, so
entering spiral dive happens very quickly and can be surprising for the less experienced pilot. Be careful to
enter the spiral gradually as too quick a brake application can cause a spin or enter an 'over the nose' spiral.
Because of centrifugal force due to the strong rotation generates an important there is a G-forces that make
it difficult to sustain a spiral dive for long, as will place high loads on both pilot and glider to degree of losing
consciousness by the pilot.
Care should be taken when exiting from any spiral dive. To pull out of a steep spiral dive release the applied
brake gradually, or apply opposite brake gradually. Asharp release of the brake can cause the glider to surge
and dive as the wing converts speed to lift. Always be ready to damp out any potential dive with the brakes.
Also be ready to encounter turbulence when you exit from a spiral because you may fly though your own
wake turbulence, which can cause a collapse.
If the dive is not stopping after releasing the brake, assist the glider with the outer one.

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Incidents / Recovery Techniques
The LUNA is designed to the highest safety but it still may enter unusual flying attitudes under certain
circumstances. These may be caused by pilot input, turbulence, unusual loads, Stalls etc.
Deep Stall / Parachutal Stall
It may happen that a glider keeps its normal shape on a very slow release of the B- lines, but stays
descending vertically and without moving forward. This is called 'deep stall' or 'Parachutal stall'.
The chance that this will happen to any BGD glider is very small, but it fit happens, your should immediately
raise both brakes fully and the glider should return to normal flight. If after some seconds still nothing
happens, push the A-risers forward or apply the speed bar to get back normal flight.
Be sure that the glider flies normally again (check your airspeed) before using any brakes again.
Please keep in mind that just a few centimeter of pulled down brakes can keep your wing in the stall. If you
use wraps –release them immediately in these cases
Deflations
As a paraglider is a flexible wing, hitting turbulence may cause a portion of the wing to collapse suddenly. If
you get a collapse, at first you should take care to keep control of your direction. Try to stay away from the
ground or obstacles and other pilots, or at least not to fly into them...
Asymmetric collapses can be controlled by weight shifting away from the collapse and applying a small
amount of brake to control your direction. This at most of the time should be enough for the wing to recover
fully.
A glider which is already deflated is in fact a much smaller wing, which means that wing loading and stall
speed get higher. This causes the glider to spin or stall with less brake input then it would when full open. Be
careful in your attempts using brakes to stop the glider turning towards the collapsed side as you might to
stall the side of the wing that is still flying. If you cannot stop the glider turning without getting close to the
stall point then let the glider keep on turning while you re-inflate the wing after the collapse.
A deflation, which does not immediately reinflate, you have to pump long smooth but progressive on the
deflated side. About 2 seconds per pump seems to work fine. Pumping too short and fast will not re inflate
the wing and pumping too slow might take the glider close to, or beyond, the stall point.
Symmetrical collapses should re inflate without pilot input, but 15 to 20cm of brake applied symmetrically will
speedup re inflation.
If your LUNA collapses in accelerated flight, immediately release the accelerator to slow down to trim speed
and control the direction using a bit of command - the glider will re inflate and return to normal flight.
Cravats
When a part (normally the tip) of your wing gets stuck in the lines, this is called a 'cravat'. This can make your
glider go into a spiral, which may be difficult to control. The first action to get out of this situation is to stabilize
the glider into normal flight by maintaining control of your direction and then pull down the stabilo line (B-
riser) until you feel tension to help release the tip. You must be careful with any brake inputs or you may stall
the opposite wing.
If this does not work, a full stall (symmetrical or asymmetrical) is the only other option. This should not be
done unless you have been taught how to do so and it can only be done with a safe amount of altitude.
Remember if the rotation is accelerating and you are unable to control it, you should use your reserve
parachute whilst you still have enough time and altitude.
IMPORTANT: A bad preparation on launch, aerobatic flying, flying a wing of too high a level or in conditions
too strong for your ability, are the main causes of cravats.

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Aerobatics
The LUNA is not designed for Aerobatic and therefore these manoeuvres should not be executed. The
LUNA has been designed as paramotor wing and is not suitable for aerobatic manoeuvres. The LUNA is not
certified for aerobatic flying.
Aerobatic flying may put abnormal stresses on the glider and lead to loss of pilot control more so when these
difficult manoeuvres are executed wrong,
Also official certification standards for aerobatic flying have not been set up yet.
BGD strongly recommends you do not undertake this style of flying.
Storage & Servicing
Storage & Care
a) If you have to pack away your canopy wet, do not leave it for more than a few hours in that condition. As
soon as possible dry out the canopy. Do not use direct heat sources to dry canopy as it is inflammable.
b) Always store the canopy in a dry, airy place, which is not exposed to sunlight (UV).
c) Never let your canopy freeze, particularly if is damp.
d) The LUNA is made from high quality materials, which are treated against fast weakening from Ultra Violet
radiation. However it is always wise to minimise the exposure to U.V. radiation as this weakens the fabric of
the canopy, and long exposure to harsh sunlight can severely compromise the safety of your canopy.
Therefore once you have finished flying put away your canopy from UV exposure. Do not leave it laying in
sunshine unnecessarily.
If you are concerned about any aspect of the integrity of your paramotor glider please contact your nearest
BGD dealer or talk to BGD direct.
e) Do not treat your canopy with chemical cleaners or solvents. If you must wash your canopy use a soft
cloth dampened only with warm water. If your canopy gets wet in sea water, wash it with warm water and
carefully dry it.
f) Small tears in the top or bottom surface (not normally the ribs) of a canopy can be repaired with a patch of
self-adhesive spinnaker nylon.
Tears no longer than 100 mm can be repaired in this way providing they are not in a high stress area. If you
have any doubt about the airworthiness of your canopy please contact your dealer or BGD directly.
Servicing
It is important to have your glider regularly serviced.
Your LUNA should have a thorough check every year or every 200 flights, which ever is the earliest. BGD
offers an inspection service every winter. This is a comprehensive service which checks line lengths and
strength, fabric porosity and tear strength and a variety of other tests and we strongly advise all pilots to take
advantage of this.
Please ensure you return this manual with your glider with the number of flights and hours flown written in
the Certificate of Service.
NB. The manufacturer will only accept responsibility for paramotor glider lines and repairs where the
manufacturer has produced and fitted such lines or carried out repairs.