Dudek VOX-25S User manual

Users Manual
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NOTE!
Please read this operating manual before the first flight
MPORTANT:
Remember to fill in and send us the registration card, which is sewn on to the
trailing edge of the paraglider. When we receive it, we will send you the
Warranty, AeroCasco or Golden Package confirmation (whichever you
choose). You will also receive small gifts.
If you have bought the paraglider together with the Golden Package, you will
receive:
$Golden Package, AeroCasco and Warranty confirmation (after you have
sent the registration card),
$free technical servicing (firs one),
$Cordura backpack
$speed system
$small gifts.
More information about the Golden Package on page 21.
If you have bought the paraglider without the Golden Package, but with
AeroCasco, you will receive:
$AeroCasco and Warranty confirmation (after you have sent the
registration card)
$small gifts
More information about AeroCasco on page 20.
If you have bought the paraglider without the Golden Package or AeroCasco,
you will receive:
$Warranty confirmation (after you have sent the registration card)
$small gifts
More information about Warranty on page 19.
The above mentioned confirmations will allow us later to identify the
paraglider, to categorize it into a proper insurance group and to determine the
insurance expiry date.
Also, the confirmations are useful, when you want to sell the paraglider (they
allow the new owner to keep all the benefits).
NOTE! If you aren't the first owner of the paraglider, you should send us the
registration confirmation together with a copy of previous users' logbooks (total of
flying hours) within 14 days from the date of purchase, in order to be able to keep
the warranty.
Details on page 20.

CONTENTS
1. Introduction...........................................................................................3
2. About the wing......................................................................................3
RIGGING SYSTEM
WHO SHOULD FLY VOX?
3. Speed system........................................................................................6
SPEED SYSTEM ADJUSTMENT
SPEED SYSTEM USAGE
4. Harness..................................................................................................7
5. Flight......................................................................................................8
PRE-FLIGHT CHECK
LAUNCH
TURNS
SPIRAL DIVE
THERMALLING AND SOARING
FLYING WITH SPEED SYSTEM ENGAGED
LANDING
WINCHING AND MOTOPARAGLIDING
AEROBATICS
6. Extreme Flying Manoeuvres..............................................................12
TUCK
FULL STALL
WING OVER
SPIN
FRONTAL COLLAPSE
LINE OVER
DEEP STALL
EMERGENCY STEERING
7. Rapid Descents...................................................................................15
SPIRAL DIVE
BIG EARS
B-STALL
8. Canopy Care........................................................................................16
STORAGE
CLEANING
REPAIR
DETERIORATION: A FEW TIPS!
9. Technical data.................................................................................18
10. Tree Star Security Assistance........................................................19
11. What have you bought......................................................................22
12. Rigging tables....................................................................................23
Page

1. Introduction
ICONGRATULATIONS!
We are pleased to welcome you among the number of discerning
Dudek paragliding pilots. You are now a proud owner of a state-of-the-
art paraglider. Extensive development by using the most modern
methods and thorough tests make the Dudek VOX a user friendly
paraglider without neglecting performance and fun of flying.
We wish you many enjoyable hours flying your new Dudek VOX.
DISCLAIMER.
Please read this manual carefully and note the following details:
$The purpose of this manual is to offer guidelines to the pilot in the use
of the Dudek VOX wing and it is no way intended to be used as a
training manual for this or any other paraglider.
$
$
$
$
$
$
NOTICE
Dudek Paragliding warns that due to constant process of development the
actual paraglider may differ slightly from the one described in the manual.
2. About the VOX wing
The Dudek VOX represents a perfect combination of performance and
safety.
The VOX is a slim, elliptical wing with a rearward swept plan form. Its double
cells ensure a smooth top surface, exact airfoil reproduction, and yet most
importantly, fewer suspension points. The VOX has greatly reduced the
number of lines used and thus the associated parasitic drag, which
especially at high speed gives it an exceptional glide angle.
You may only fly a paraglider when qualified to do so or when
undergoing training from an accredited School or Instructor.
This paraglider meets at the time of delivery the requirements of the
CEN/AFNOR.
Any alterations to the paraglider will render its certification invalid!
The use of this paraglider is solely at the user's own risk!
Manufacturer and distributor do not accept any liability.
Pilots are responsible for their own safety and their paraglider's
airworthiness.
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Four additional cells on each side form a clean wing tip and stabilisers
ensure stable straight flight and co-ordinated turns. The airfoil of the VOX is
derived from experience that we got designing and then using our previous
intermediate paragliders. The airfoil was tested any analysed using a
numerical method with a help of computer program. Its thick shape offers
above all, excellent safety.
The VOX presents a closed leading edge to the airflow, while internal
laminated [JWD1] reinforcements maintain its precise form. Some of the
reinforcements are padded with a ribbon to protect wing skin. The cell
openings of the VOX are on the undersurface. Dacron flares at the
suspension points and between-line reinforcements ensure an equal
distribution of load throughout the canopy.
Large cross port vents are cut using hydraulic press and this ensures that
they are smooth and its shape is very accurate. This is turn providing good
reinflation without affecting the profile of the canopy.
RIGGING SYSTEM OF THE DUDEK VOX
VOX lines are made of a strong and stretch resistant sheath-core
construction. Because total length of lines is not big, he coloured polyester
sheath covers brown core made of Technora that is very strong and is not
stretchy.
Because total length of VOX lines is not big, all of them are made of a strong
and stretch resistant sheath-core construction: the sheath consists of
coloured polyester with a core of brown Technora. The rigging system
comprises individual lines looped and stitched at each end. The main lines
and the main brake lines are 2.15 mm in diameter Technora, the cascaded
middle lines 1.5 mm Technora, and the cascaded top lines, 1.1 mm.
The suspension lines comprise of "cascaded top lines" (attach to the
undersurface), "cascaded middle lines" (cascade 2 or 4 top lines together),
and "main lines". Main lines cascade 2 middle lines together and lead to the
"quick link" (a Mallion Rapide that connects lines and risers). Also "stabiliser
lines" connect the upper stabiliser lines on the outer suspension points to a
quick link.
The "brake lines" are not suspension lines. They are cascaded at the same
way and lead from the trailing edge of the canopy through the "pulley" on the
back-risers to the "brake handle".
Risers are coloured for differentiation purposes:
A’ - blue - used for Big Ears,
A - gold - used for launching,
B - red - used for B-stall,
C,D - grey - for deflating the canopy in strong winds (aborting a launch)
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The line connections are made to triangular mallion rapides (quick links)
fitted with a rubber "O ring" (normally used as a seal) in the form of a "figure
eight" preventing any slipping of the lines on the quick link.
The brake lines are attached to suspension tabs, each of which is sewn to
the near to trailing edge. The main brake lines go through pulleys connected
to the C-riser and then are attached o the brake handles.
The main brake lines are attached to the brake handles at their optimum
trimming point, which is also marked on the line. This adjustment, on the one
hand, allows sufficient brake to be applied during extreme flying situations
and landing, while on the other hand it ensures that the canopy is not
permanently braked. This trimming should not be altered.
WHO SHOULD FLY VOX?
We have designed this paraglider for the following pilots:
$Pilots, who, having acquired experience on recreational wings, would
like to try their hand at flying a paraglider enabling cross country flights.
$Ambitious and talented pilots, who, having graduated from paragliding
course and having acquired substantial experience on club equipment,
want to buy intermediate paraglider immediately, skipping recreational
stage.
$Intermediate competitors, who would like to start taking part in
competitions but with big safety margin.
$Motoparagliding.
$For pilots living rather at flat countryside and who need a wing, that
winched will gain altitude efficiently and very stable.
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3. Speed system
The Dudek VOX can be flown with a speed bar operated system.
The VOX has 3 risers. All A lines are attached to the A and A" riser, the B
lines and the stabiliser together to the B riser, the 3rd riser, "C", leads to all
the C-lines and attaches the brake lines trough pulleys.
The speed system affects the risers A (with A") and the B. In normal flight all
risers have an overall length of 55 cm. When the speed bar is being pushed
out, A-risers and gradually B-risers are shortening up to the difference of 2
cm between them. Speed system is able to shorten A and B risers up to 15
cm and 13 cm respectively. C-risers retain their original length.
An incorrectly fitted speed system results in the loss of certification!
HOW IS IT FITTED?
Most modern harnesses have pulleys attached for speed system fitting.
In case not, it is important to attach pulleys (sewn on tabs) in such a way
that, allows the pilot to maximise the power vector of his / her legs, without
"pushing back" in the harness.
Linka wychodz¹ca od belki przyspieszacza, powinna byæ trwale z ni¹ The
speed system cord is firmly attached (use bowline or other non-slip knot) to
the speed bar. The other end of the cord is run through a pulley on the
harness and then in an upward direction, to be firmly attached to a small
carabiner with very strong spring action. The length of the cord leading to the
speed bar should be such that it is easy to put your feet into the bar in flight,
and yet short enough to allow the full speed range. To achieve full range of
Vox speed system, double speed bar should be used.
Ensure both cords on the speed bar are of equal length, to avoid putting a
turn in the paraglider. Test your speed system for the correct length of cord
on the ground first, with your harness and risers, before flying with it!
The full range is reached, when the 2 pulleys join together.
The speed system utilises a pulley mechanism, which results in shortening
the risers as described above.
HOW TO USE IT?
Before launch, attach risers of paraglider to the harness with main
carabiners.
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Then attach clip or quick link on end of speed system cord, to the loop on
the end of the cord which runs through the 2 pulleys sewn on the A risers.
Ensure that the speed system is untangled and runs freely for operation
before flying.
To use the speed system, simply place your feet on the speed bar and push
forward in a horizontal plane. If a loss of backpressure of the bar on your
legs is noticed, this is a warning that the canopy is probably about to
collapse. Release the bar and thus speed system immediately.
With this "feeling" you may actually prevent most tucks from happening while
using the speed system. If a tuck (collapse) does still happen, release speed
system immediately and correct collapse as described in section "Tucks".
When using the speed system, the angle of attack is lowered, thus
airspeed is increasing, and the canopy is destabilising. Therefore do
not use the speed system in turbulent conditions, close to the ground
or near other airspace users!
Do not use the speed system in any extreme manoeuvres! If the
canopy does collapse, release the speed bar immediately and correct
any tucks as normal! Do not release the brake handles!
4. Harness
Any certified harness with a hang point at between 35 cm and 49 cm from a
seat may be used with a Dudek VOX (however the safest distance is 40
cm). The distance between carabiners should be between 37 cm and 45 cm
(however the safest distance is 40 cm).
Please note the hang point position changes the position of the brakes
relative to the pilot's body.
Caution! Too tight cross straps can drastically effect the handling, and
thus may not actually contribute to higher safety. Have them tightened
the correct amount.
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5. Flight
PRE-FLIGHT CHECK
A thorough pre-flight check is essential for any aircraft; the Dudek VOX is no
exception.
Having unpacked and laid out the paraglider in a horseshoe the following
checks must be made:
$The paraglider should be arranged in such a way that the A-lines in the
centre section of the canopy will tension before the ones at the wing
tips.
$This ensures an easy and balanced launch.
$All lines and risers should be untangled and arranged in a way that
they do not catch on anything. Special attention should be paid to the
A-lines, which should run free and untangled from the A- risers (yellow
band) and A" risers (blue band) to the canopy.
$It is equally important to untangle the brake lines so that they are clear
and cannot catch on anything during launch.
$The brake lines should run freely through the pulleys to the trailing
edge of the canopy. Make sure the risers are not twisted. It is important
that no lines are looped around the canopy. A so-called "line-over" may
have disastrous consequences during take off.
$Before every launch check lines, risers and canopy for damage! Do not
launch in case of even the smallest damage!
Always put on and fasten your helmet before clipping in to the harness.
Check mallion rapide quick links. Their screw gates could unscrew especially
while the wing is new.
Check suspension carabiners. They should be properly mounted and their
gates fully secured.
LAUNCH
The Dudek VOX is easy to launch.
When the pilot is ready to take off he / she holds the brake handles and the
A-risers (yellow band). A" raisers (blue band) hangs freely between hand
and A-raiser.
Hold the A risers the same height and slightly in front of your shoulders.
Before continuing, a last glance and check of the canopy is obligatory.
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A good progressive run ensures your Dudek VOX will inflate and come up
equally and quickly.
After the initial effort of inflation, keep applying forward pressure on the A
risers (pushing them forward not pulling down) until the pressure on the A
risers eases. The canopy should now be directly over he pilot's head. The
paraglider should be braked gently to stabilise the glider and possibly correct
for drift in order to keep it above the pilot's head.
Moving the pilots body to the centre of the glider is the best method of
correction, if there is sufficient room.
The pilot looks up and checks that the canopy is fully inflated with no line
tangles.
Only then is the final decision to continue the launch taken!
The Dudek VOX is easy to reverse launch. As this launch technique can be
difficult and can result in the pilot taking off with twisted risers, it is
recommended to practice the reverse launch on a training hill first.
When deflating the canopy in strong winds, if aborting a launch, use the C
risers, not the brakes. Using the brakes in strong wind will cause more lift,
lifting the pilot up and dragging him/her much further back.
TURNS
The Dudek VOX is very responsive; it has exceptionally easy handling and
reacts instantly, to any steering input. Weight shift input quickens turns and
also results in wide and flat turns with minimal height loss.
A combined technique: weight shift and pulling on the appropriate brake line
is the most efficient turning method for any situation, whereby the radius of
the turn is determined by the amount of inside brake pulled and weight shift.
Applying a little outside brake in turns, after the initiating the turn with
maximum weight shift, increases efficiency and also the outside wing's
resistance to collapsing in turbulence (edge of thermals).
In case it is necessary to turn the Dudek VOX in a confined area at slow
speed, it is recommended to steer the decelerated canopy by loosening the
brake at the outside of the turn while applying a little more brake on the
inside of the turn.
For the Dudek VOX minimum sink is attained with slight brake pressure
applied (from 10 cm to 15 cm depending on pilot weight).
Note: Apply slight brake pressure if turbulence is encountered. It allows you
to react immediately when the problem encounters.
WARNING: pulling one brake too hard or too fast can result in the canopy
entering a negative spin.
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SPIRAL DIVE
To enter a spiral dive with a Dudek VOX the pilot must:
$At the normal flight speed apply the break (about 30 cm),
$Add weight shift on the same side.
After the 180° turn, applying more and more brake input will initiate an
increasingly steeper turn which eventually results in a spiral dive.
During a spiral dive increasing or reducing the amount of inside brake can
control the angle of bank. To exit, ease off inside brake slowly. Watch for,
and dampen any surging. Allow sufficient height in the unlikely case that the
glider continues 1 or 2 turns. If the paraglider does not exit from spiral dive,
apply outside break slightly.
Induce and recover slowly from a spiral dive! Due to the rapid loss of height
encountered during a spiral dive (up to the 20 m/sec) sufficient altitude is
essential for this manoeuvre! Spiral dives can also create very high G-
forces, placing high loads on the glider's structure and the pilot.
Be careful not to overload it and yourself.
NEVER DO BIG EARS IN SPIRALS, AS THIS MAY DRASTICALLY
REDUCE THE NUMBER OF LINES TAKING THE ALREADY HIGH LOADS,
POSSIBLY CAUSING STRUCTURAL FAILURE.
THERMALING AND SOARING
In turbulent conditions the canopy should be flown with a small amount of
brake applied. This improves stability by increasing the angle of attack of the
canopy. The canopy should not rock back or surge forwards but should
remain above the pilot.
Thus, the pilot should increase speed by letting the controls up when
entering a thermal (according to its strength) and should brake the canopy
on exiting. This is part of basic active flying.
When soaring a minimum height of 50 m above ground level is
recommended for safety reasons. It is important to comply with the rules of
the air, especially when many pilots share airspace close to a hill where last
minute avoidance manoeuvres are often not possible.
With an active flight style, many potential collapses of the canopy can be
avoided.
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FLYING WITH SPEED SYSTEM
When flying into head wind or through sink, for best glide angle, it is
advisable to increase speed by applying speed systems as long as
conditions are not too turbulent. The angle of attack is lowered with the
increase in speed and the canopy may tuck easier than in normal flight.
Tucks and stalls are more dynamic the faster the canopy is flown. See
"Speed system" section.
LANDING
The Dudek VOX is easy to land. The final leg of the landing approach must
be into wind. During this final glide the paraglider should be decelerated
slowly and at approximately 1 meter above the ground the pilot should "flare"
the canopy, according to conditions. The glider may climb again, gaining
height, if too much brake is used.
Strong wind landings require hardly any brake, if any at all! Use C-risers to
deflate the canopy after landing. Using the brakes will result in pilot being
lifted and dragged backwards.
The final glide during the landing approach should be straight and not
marked by steep or alternating turns as these can result in a dangerous
pendulum effect near the ground.
WINCHING AND MOTORED FLIGHT
The Dudek VOX has no winching or paramotoring contraindication.
AEROBATICS
The Dudek VOX is not designed to be used for aerobatics.
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6. Extreme Flying Manoeuvres
EXTREME FLYING MANOEUVRES SHOULD ONLY BE CARRIED OUT
DURING SAFETY TRAINING COURSE (INSTABILITY TRAINING) UNDER
PROPER INSTRUCTION!
TUCK
A negative angle of attack will cause the Dudek VOX, like any other
paraglider, to tuck.
If one wing tucks, straight flight is maintained by "correcting for direction", by
weight shifting and braking gently on the inflated side. The pilot's "correction
for direction" can be aided by a "pumping out of the deflation", a slow, long
pumping action on the brake of the deflated side of the wing helps the
canopy to re-inflate.
In case of a big tuck more weight shifting should be made and this braking
should be very gentle to avoid the remaining inflated canopy from stalling.
This will result a greater margin of safety from the stall point.
If the pilot does not correct for direction, the canopy usually self-recovers, in
smooth air, in less than 1 complete turn. In case the canopy does not
recover by itself, the appropriate amount of brake must be applied to correct
for direction and exit the turn otherwise the glider will enter a spiral dive.
If this spiral dive is entered, it should be exited by slowly and gently applying
the outside brake until the canopy starts to retain a level bank angle.
Just at this phase, when the pilot pendulums under and in front of the
canopy, it is vital that the brakes are applied very gently, feeling the pressure
and not applying too much. In fact, often it is necessary to partially release
the brakes. When the glider is flying straight and level again, "pump out" the
collapsed side.
IF THE PILOT DOES NOT ACTIVELY EXIT FROM THE ABOVE SPIRAL, IT
WILL CONTINUE UNTIL IMPACT!
FULL STALL
To induce a full stall, apply full brake on both sides and hold the brakes in
that position with all your strength.
Applying the breaks slowly more and more, will also lead the Dudek VOX
into a full stall. In this case however, wing will warn pilot before it enters the
stall point.
At this moment pilot feels a very high resistance on the breaks and wing falls
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down and a little back. It is the very last moment to release the breaks and
not fall into a full stall.
The Dudek VOX generally flies backwards during a full stall and forms a
front rosette. The canopy must be stabilised (flying directly overhead) before
letting out the full stall. If the canopy is not stabilised and the full stall is let
out too early when the canopy still sitting back, it will surge forward a long
way. To recover from a full stall both brakes must be let up symmetrically at a
moderate speed (1 second). The Dudek VOX surges forward a little bit after
recovering from a full stall whereby a tuck may occur.
An "asymmetric" recovery (one control released faster than the other) from a
full stall may result in a big, dynamic, tuck.
Pilots must not practise an asymmetric recovery from a full stall.
The danger of overcorrecting and overreacting exists during all extreme
flight manoeuvres: Thus, any corrective action must be gentle and steady
and done with feel!
SPIN
A spin is induced when the pilot in full speed (DHV test) or in very slow flight
(AFNOR) pulls one brake line all the way down very hard and very quickly.
During a spin the canopy turns relatively fast around the centre section of
the canopy while the inner wing flies backwards.
To recover from a unintentional spin, the pulled down brake line should be
immediately eased off as soon as the situation is noticed, so that the canopy
may accelerate and return to its normal straight and stable flying position,
without losing too much height.
For recovery from an intentional spin, also release pulled down brake line.
Watch for and dampen any surging.
In case the spin is allowed to develop for some time, the canopy must be
stabilised before the recovery. Recovering from a deep spin can result in
forward surge on one side and an asymmetric tuck can occur. If so, brake
gently to stop canopy surging, correcting tuck: see "tucks".
WINGOVER
To induce a wingover the pilot flies consecutive alternating turns to gradually
steepen the angle of bank. Too steep an angle of attack will result in a
collapse, which may be quite dynamic.
Warning: A turn with more than a 60-degree angle of bank is illegal
aerobatics!
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FRONT STALL
If the pilot pulls both A-risers a front-stall is induced: the entire leading edge
tucks and the canopy generally forms a frontal horseshoe.
THE SINK RATE FROM THIS MANOEUVRE CAN BE VERY HIGH.
ENSURE YOU HAVE ENOUGH HEIGHT. THE VOX USUALLY SELF
RECOVERS FROM A FRONTAL STALL AFTER RELEASING THE A
RISERS. TO HELP THE RECOVERY, BOTH BRAKES SHOULD BE
MODERATELY APPLIED.
LINE OVER
If for any reason, lines are tangled or looped around the canopy during flight,
the following action should be taken:
$Maintain straight flight by gently and feel fully correcting for direction
using the weight shift and brakes!
$Check the situation carefully and once the line(s) looped around the
canopy, is/are identified pull it/them gently to untangle.
$Pumping of the brakes in a line over doesn't always work. If a very
large unrecoverable collapse and line over occurs, it may be possible,
to clear the problem by entry and safe recovery from a full stall. This
should only be carried out if sufficient altitude is available. If insufficient
height is available (300m/1000ft), or if in any doubt, the pilot should
strongly consider reserve deployment.
DEEP STALL
The Dudek VOX generally does not remain in deep stall, and is self
recovering, when releasing any brake or riser input used to enter it.
In case the recovery from a B-stall was not dynamic enough and the canopy
remains in a deep stall, it is sufficient to gently pull down both A-risers to
reduce the angle of attack and re-attach airflow to the canopy.
EMERGENCY STEERING
In case it is impossible to control the Dudek VOX with the brake lines the
outer C-lines, C-risers (slightly) or the stabiliser lines may be used to steer
and land the canopy.
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7. Rapid Descents
SPIRAL DIVE
Spiral dives as explained previously have a rapid descent rate, however, the
very high G-forces make it difficult to sustain a spiral dive for long and it can
place high loads on the pilot and glider. Never do these in turbulence or at
too high bank angles.
If done in strong winds the pilot may drift off course.
NEVER DO BIG EARS IN A SPIRAL!
Tests have proven that loads can be developed higher than those used in
certification tests, which could result in structural failure of the glider, as less
lines are taking these high loads.
BIG EARS
The outer cells of the wing tips may be deflated by pulling down the A"
raisers (blue band) simultaneously by approximately 50 cm.
It is important to not let go off the brake toggles while entering the Big Ears
manoeuvre.
The canopy remains completely controllable through weight shift. It
maintains straight flight but with an increased sink rate (up to approx. 5
m/sec).
On releasing the A"-raisers the canopy usually reinflates by itself, or can be
aided by a long pump until tips clear.
B - LINE - STALL
To induce a B line stall pull both B - risers simultaneously by 20 - 30 cm. The
airflow over the top surface is detached and the canopy enters a parachutal-
stall without moving forward.
Further pulling of the B-risers reduces the surface area and increases the
sink rate (to approx. 10 m/sec) and leads to bigger wing unstability.
On quickly (symmetrically) releasing the B lines the airflow over the top
surface becomes reattached and the canopy surges forward to return to
normal flight.
If canopy does not recover see section "Deep Stall".
In the possibility that the canopy forms a frontal horseshoe, apply both
brakes gently to recover.
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All rapid descent techniques should be practised in smooth air and with
sufficient height! Full stalls and spins are to be avoided as wrong recovery
procedures, irrespective of the type of paraglider, may have dangerous
consequences!
BY FAR THE BEST TECHNIQUE IS TO FLY CORRECTLY AND SAFELY,
SO YOU NEVER HAVE TO DESCEND RAPIDLY!
8. Looking after your Paraglider.
Looking after your canopy correctly will prolong the life of your Dudek VOX.
STORAGE
Store the paraglider in a dry space away from chemicals and UV light.
Never pack up or store the glider wet. This shortens the life of the cloth.
Wing gets wet also while it just lays on a green grass in sunlight. Always dry
glider thoroughly before any packing or storage.
To avoid paraglider fabric waste, don not pack it too tight.
While drying never expose your paraglider to direct sunlight.
Please note that if you play often with your wing on a field or a small hill,
fabric of your paraglider will waste. It is caused by frequent rising up and
falling down your glider and dragging it in on a surface.
CLEANING
Clean the paraglider with water and a soft sponge. Do not use any
chemicals or spirits for cleaning, as these can permanently damage the
cloth.
REPAIR
Repairs should only be carried out by the manufacturer, authorised
distributor or authorised workshops.
DETERIORATION: A FEW TIPS!
The Dudek VOX is mainly made of NYLON, cloth which, like any synthetic
material, deteriorates through excessive exposure to UV.
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Hence, it is recommended to reduce UV exposure to a minimum by keeping
the paraglider packed away when not in use. Even when packed in the bag
do not leave in the sun.
The lines of the Dudek VOX are made of an inner core of Technora and an
outer sheath of polyester. Any over stretching of lines apart from the strain
imposed during flight should be avoided as over stretching is irreversible.
Ensure that the lines are not folded tightly.
Keep the canopy and lines clean as dirt may penetrate into the fibre and
shorten the line life or damage the cloth.
Be careful, not to allow snow, sand or stones to enter inside the canopy's
cells: the weight can brake, or even stall the glider, as well as the sharp
edges can destroy the cloth!
Prevent lines from catching on anything as they may be over stretched.
Do not step onto the lines.
Uncontrolled strong wind takeoffs or landings can result in the leading edge
of the canopy hitting the ground at high speed, which may cause rips in the
profile and damage the material.
The brake line can chafe if badly tangled.
Check line length after tree or water landings. They can stretch or shrink
lines. Clean the paraglider with fresh water after contact with salt water.
Salt-water crystal can weaken line strength, even after rinsing in fresh water.
Replace lines immediately after contact with salt water. Also check canopy
material after water landings, as waves can place uneven forces and cause
cloth to distort in specific areas. Always remove gliders from the water by
holding only the trailing edge. A line plan is enclosed in this operator's
manual or may be requested from the manufacturer or importer.
Every second year VOX should undergo inspection by the
manufacturer or authorised distributor.
1717
USER MANUALUSER MANUAL

9. Technical Data
voxvox
1818
VOX-25S VOX-27A VOX-29A VOX-31AVOX-25S VOX-27A VOX-29A VOX-31A
-
50
31,37
28,19
12,22
10,38
310,3
66,9
775,7
368
110-135
Standard
50
29,35
26,37
11,82
10,04
300,2
64,7
750,4
355,54
90-117
Standard
50
27,40
24,62
11,42
9,70
290
62,5
725
341,92
75-97
Standard
50
25,57
22,97
11,03
9,37
280,1
60,4
700,4
330,16
60-80
min = 1,0; opt = 1,2; max = 2,0
min = 21; opt = 36; max = 47
Technora 1,1; 1,5 i 2,15
4,76
3,82
2
upper surface: SkyTex AQUATIC 44 g/m (E 85 A)
2
lower surface: SkyTex New 39 g/m soft (E 38 A)
2
ribbs: SkyTex New 39 g/m hard (E 29 A)
PASAMON, Bydgoszcz, Polska
Certyfikation CEN / AFNOR
Number of cells
2
Surface area (flat) [m ]
2
Surface area (projected) [m ]
Span (flat) [m]
Span (projected) [m]
Aspect Ratio (projected)
Aspect Ratio (flat)
Sink rate [m/s]
Speed [km/h]
Max cord [cm]
Min. cord [cm]
Distance pilot to wing [cm]
Total line lenght [m]
Weight range [kg]
Lines [mm]
Fabric
Risers
Certyfikation CEN / AFNOR
Number of cells
Surface area (flat) [m ]
Surface area (projected) [m ]
Span (flat) [m]
Span (projected) [m]
Aspect Ratio (projected)
Aspect Ratio (flat)
Sink rate [m/s]
Speed [km/h]
Max cord [cm]
Min. cord [cm]
Distance pilot to wing [cm]
Total line lenght [m]
Weight range [kg]
Lines [mm]
Fabric
Risers
2
2