Welcome to this edition of the Thermal Circle in this edition an edited version of the F3B rules as provided by the FAI website and new products from Multiplex and Jeti many thanks to Model Flight for allowing the new text to be used!!!

Available from:

CLASS F3B – MULTI-TASK GLIDERS

 

General Rules

5.3.1.1. Definition of a Radio Controlled Glider Model aircraft which is not provided with a propulsion device and in which lift is generated by aerodynamic forces acting on surfaces remaining fixed in flight, except control surfaces. Model aircraft with variable geometry or area must comply with the specification when the surfaces are in maximum and minimum extended mode. The model aircraft must be controlled by the competitor on the ground using radio control. Any variation of geometry or area must be actuated at distance by radio control.

  5.3.1.2. Prefabrication of F3B Model Aircraft Paragraph B.3.1 a) of Section 4B (Builder of the Model aircraft) is not applicable to class F3B. 5.3.1.3. Characteristics of Radio Controlled Gliders F3B a)

Maximum surface area ..................................... 150 dm2

Maximum flying mass ........................................ 5 kg

Loading .............................................................. 12 to 75 g/dm2

Minimum radius of fuselage nose ...................... 7.5 mm (see template)

TEMPLATE FOR NOSE RADIUS, TOW HOOK AND MARKING 

 

b) No fixed or retractable arresting device (i.e. bolt, sawtooth-like protuberance, etc.) is allowed to slow down the model aircraft on the ground during landing. The underside of the model aircraft must not have any protuberance other than the tow-hook and surface control linkages. The tow-hook must not be larger than 5 mm in frontal width and 15 mm in frontal height.

  c) The radio shall be able to operate simultaneously with other equipment at 10 kHz spacing below 50 MHz and 20 kHz spacing above 50 MHz.

d) Any transmission of information from the model aircraft to the competitor is prohibited, with the exception of signal strength and voltage of the receiver battery. Any use of telecommunication devices (including transceivers and telephones) in the field to communicate with competitors, their helpers or team managers while doing the competition task is not allowed.

  e) The competitor may use a maximum of three (3) model aircraft in the contest. All exchangeable parts (wing, fuselage, tail planes) must be marked uniquely and in a way that does not allow replication of this mark on additional parts.

f) The competitor may combine the parts of the model aircraft during the contest; provided the resulting model aircraft used for flight conforms to the rules and that the parts have been checked before the start of the contest. See also 5.3.2.1. 

g) For the sake of randomness of the starting order among the successive rounds, each competitor must enter three (3) different frequencies. The competitor can be called to use any of these frequencies during the contest, so long as the call is made at least 1/2 hour prior to the beginning of a round and in written form to the affected team manager.

5.3.1.4. Competitors and Helpers The competitor must operate his radio equipment personally. Each competitor is permitted up to three (3) helpers at the winch line, including the team manager, who must not give any turning signals near base B during tasks B and C. A maximum of two (2) more helpers are permitted to be utilised only at the turn-around pulleys to cover all wind directions. 5.3.1.5. Definition of an Attempt

a) For each task (ref. 5.3.2.1.), during the working time allocated, the competitor is entitled an unlimited number of attempts. An attempt starts when the model aircraft is released from the hands of the competitor or his helper(s) under the tension of the tow-line. No change of model aircraft or parts of the model aircraft is allowed after starting the first attempt.

b) The competitor is entitled to a new working time period if any of the following conditions occur and are duly witnessed by an official of the contest: ..i) his model aircraft in flight collides with another model aircraft in flight, or another model aircraft in the process of launch (released for flight by the competitor or his helper) or, with a launch cable during the process of launching. Should the flight continue in a normal manner, the competitor may demand that the flight in progress be accepted as official, even if the demand is made at the end of the original working time 

ii) his model aircraft or launch cable in the process of launch collides with another model aircraft or launch cable also in the process of launch (released for flight by the competitor or his helper), or with another model aircraft in flight. Should the flight continue in a normal manner, the competitor may demand that the flight in progress be accepted as official, even if the demand is made at the end of the original working time

  iii) his launch cable is crossed or fouled by that of another competitor at the point of launch of his model aircraft (released for flight by the competitor or his helper).

iv) the flight has not been judged by the fault of the judges or timekeepers.

 

v) in the case of an unexpected event, outside the competitor’s control, the flight has been hindered or aborted.

c) For all cases described above the competitor may demand that the flight in progress in which the event occurred will be accepted as official. Note is made that in the event the competitor continues to launch or does a re-launch after clearing of the hindering condition(s) he is deemed to waive his right to a new working time.

 

d) When a competitor obtains a new working time period, and his model aircraft has been damaged beyond repair during the attempt where he obtained this new working time, he is entitled to continue flying the current round with his second model aircraft and this notwithstanding rule 5.3.2.1. This rule applies only when the damage inflicted to the model aircraft is directly linked to the incident that gave the right to the re-flight.

  e) In case of additional attempts in task A (Duration) during a round or task B (Distance) during a round, the competitors entitled to that additional attempt must fly within a group that is not complete in number or in one or more groups newly formed. If this is not possible due to a clash of frequencies, those entitled to another flight fly within their original group once more. The better of the two results will be the official score except for those competitors who are flying the additional attempt. For those the result of the repetition is the official score.

5.3.1.6. Definition of the Official Flight The official flight is the last flight performed during the working time. 5.3.1.7. Cancellation of a Flight and Disqualification

 

  a) Unless otherwise specified a flight in progress will be annulled for an infraction of any rule. In the case of intentional or flagrant violation of the rules, in the judgement of the Contest Director, the competitor may be disqualified.

b) The flight in progress will be penalised with 100 points if the model aircraft loses any part either during the launch or the flight. The loss of any part in a collision with another model aircraft or during landing (ie in contact with the ground) is not taken into account. The penalty of 100 points will be a deduction from the competitor’s final score and shall be listed on the score sheet of the round in which the penalisation was applied. cont/… Class F3B Multi-Task Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 11

The competitor is disqualified if the model aircraft in flight is controlled by anyone other than the competitor.

d) If the model aircraft touches either the competitor or his helper during landing manoeuvres of task A, no landing points will be given.

e) The upwind turnaround device must be fixed safely to the ground. If the pulley comes loose from its mounting support or the turnaround device is torn out of the ground, the competitor shall be given a penalty of 1000 points. The penalty of 1000 points will be a deduction from the competitor’s final score and shall be listed on the score sheet of the round in which the penalisation was applied.

  f) The winch must be fixed safely to the ground. If the winch is torn out of the ground or rotating parts of the winch are separated (excluding parts of the tow-line) the flight is penalised with 1000 points. The penalty of 1000 points will be a deduction from the competitor’s final score and shall be listed on the score sheet of the round in which the penalisation was applied.

5.3.1.8. Organisation of Starts a) The competitors shall be combined in groups with a draw, in accordance with the radio frequencies used, to permit as many flights simultaneously as possible. The draw is organised in such a way that, as far as possible, there are no competitors of the same team in the same group.

  b) The composition of the groups must be changed every round in order to have different combinations of competitors. For task A (duration), there must be a minimum of five competitors in a group. For task B (distance) there must be a minimum of three competitors in a group. For task C (speed) a group may consist of a minimum of eight competitors or all competitors. It is preferable for the organiser to orientate the starting order for task C at the inverted ranking calculated out of the results of all tasks flown until that moment. For the first round the starting order for task C should always be identical with the starting order of task A. Alternatively the organiser may use the task A starting order in subsequent task C rounds.

c) The result of a group is annulled if only one competitor has a valid result. In this case, the group will fly again and the result will be the official result.

d) The flying order of different groups is established with the draw too. A different starting order shall be used for each round.

e) The competitors are entitled to 5 minutes of preparation time before the starter gives the order to count off working time.

  5.3.1.9. Organisation of Contests a) For transmitter and frequency control see Section 4B, para B.10.

b) The official will issue the transmitter to the competitors only at the beginning of their preparation time, according to 5.3.1.8.

c) Sighting apparatus, winches or any device constituting an obstacle, should be placed on Base A and Base B, a minimum of 5 metres from the safety line for task C. Apparatus for judging the safety plane in task C shall be placed a minimum distance of 5 metres from Base A or B outside the course.

d) The contest director must inform without delay the competitor and/or his team manager about any decision taken, eg in the case of a re-fly, a penalty etc.

5.3.1.10. Safety Rules a) The organiser must clearly mark the boundary between the landing area and the safety area assigned for other activities.

b) After release of the model aircraft from the hand of the competitor or helper, any contact of the model aircraft with any object (earth, car, stick, plant, tow-line, etc) within the safety area will be penalised by 300 points, except in the circumstances described in paragraph 

5.3.1.5 b) items 1, 2, 3, and 5, and in the case of a line break at the moment of release of the model aircraft. Contact with a person within the safety area will be penalised by 1000 points. The number of contacts during one attempt does not matter (maximum one penalty for one attempt). The penalty will be a deduction of 300 or 1000 points from the competitor’s final score and shall be listed on the score sheet of the round in which the penalisation was applied. Class F3B Multi-Task Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 12

 

5.3.2. RULES FOR MULTI-TASK CONTESTS 5.3.2.1. 

 

Definition a) This contest is a multi-task event for radio controlled gliders, which includes three tasks: A) Duration B) Distance C) Speed b) The combination of task A, B and C constitutes a round. A minimum of two rounds must be flown. Except at World and Continental Championships the last round may be incomplete, i.e. only one task or any combination of two tasks. In the case of a World Championships each competitor is entitled a minimum of five rounds subject to the provision of rule B.13, Section 4B. At the discretion of the organiser any task may be flown first in a scheduled round.

c) Any single round must be completed with the same model aircraft, without any change of parts. Only the addition of ballast (which must be located internally in the model aircraft and with which the model aircraft must conform to rule 5.3.1.3.) and/or change of angles of setting are allowed.

d) Variation of geometry or area is allowed if actuated at distance by radio control.

5.3.2.2. Launching a) All launching shall take place in an area as designated by the organiser with provisions made for launching into the wind. All launches will be made with an electrical powered winch approved by the organiser or Contest Director.

  b) Upwind turnaround devices, which must be used, shall be no more than 200 metres from the winch. The height of the axis of the turnaround pulley from the ground must not exceed 0.5 metre. Release of the model must occur within approximately 3 metres of the winch. An automatic means must be provided to prevent the line unwinding from the reel during launch.

c) The winch shall be fitted with a single starter c) The winch shall be fitted with a single starter motor. The starter motor must come from serial production. It is allowed to fit the arbor of the rotor with ball or needle roller bearings at each end. The drum may be driven directly by the motor or by a gear with a constant and unchangeable transmission ratio. Any further change of the original motor will lead to disqualification according to paragraph B.18.1. The drum must have a fixed diameter.

d) The power source shall be a 12 volt lead/acid battery. The cold cranking capability of the winch battery must be specified according to one of the following standards: 300 amperes max. according to DIN 43539-02 (30s/9V at –18O C) 355 amperes max. according to IEC/CEI 95-1 (60s/8,4V at –18O C) 500 amperes max. according to SAE J537, 30s Test (30s/7,2V at 0 O F) 510 amperes max. according to EN 60095-1 (10s/7.5V at –18O C) Other standards are acceptable if evidence is provided that these standards are equivalent to one of the above stated standards.

e) The battery must supply the winch motor with current through a magnetically or mechanically actuated switch. The use of any electronic device between the winch motor and the battery is forbidden. A competitor may interchange various parts as he wishes provided the resulting winch conforms to the rules.

f) The battery must not be charged on the launching line. The motor must not be cooled, and the battery must not be heated.

g) The purpose of this rule is to limit the power used for the launch. Therefore with the exception of the single winch battery, line stretch, and the small amount of energy in the rotating rotor and winch drum, no energy storage devices like flywheels, springs, weights, pneumatic devices or any similar devices is allowed.

  h) The complete winch (battery, cables, switch and motor) must have a total resistance of at least 23.0 milliohms. The allowed resistance may be obtained by adding a fixed resistor or resistors between the motor and battery. The design must not allow an easy change of the total resistance at the launch line (eg by shorting the resistor, or resistors) except opening and closing the circuit. cont/… Class F3B Multi-Task Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 13

 

i) The plus and minus pole of the battery must be readily accessible with alligator (crocodile) clips for voltage measurements. One of the cables from the battery (through which the total current flows) must be accessible for the clamp transducer (clamp meter) and the calibrated resistor.

j) Measuring: The battery must stay unloaded for at least two minutes after the previous test or launch. The measuring of the circuit resistance consists of recording the battery voltage Ub immediately before closing the winch switch and of recording the current I300 and the voltage U300 300 milliseconds (+-30 ms) after the winch current starts to flow. Before the end of this 300 ms interval the rotor of the motor shall stop rotating.

 

k) For the test a digital voltage-measuring instrument (accuracy less or equal to 1%) is used, which enables the measurement of the voltage of the battery and the output voltage from the I/U-transducer 300 ms (+-30 ms) after the current to the winch is applied. The transducer for measuring the current may be a clamp transducer (range 0-600 or 0-1000A, accuracy less or equal to 2%) or a calibrated resistor (0.1 milliohm, accuracy less or equal to 0.5%) in the negative path of the circuit. The resistance is calculated with the formula: Measurement with clamp transducer Rtot = 1000 x Ub/I300 Measurement with shunt Rtot = (1000 x Ub/I300) – 0.1 (Rtot in milliohms, Ub in volts, I300 in amperes) l) A first measurement is taken in order to check the correct functioning of the measuring equipment and is discarded. Three subsequent measurements should be made with an interval of at least two minutes after the previous test or launch. The total resistance of the winch equipment is the average of these three (3) respective results. Voltage and current must be displayed to be able to calculate the total resistance by hand. If the total resistance is calculated automatically then it must be shown simultaneously with the voltage and current values. The winch equipment is declared as being in accordance with the rules if its total resistance is at least 23 m?. m) At the test of the winch before the competition the voltage of the battery U300 must be greater or equal to 9V; this does not apply for testing during the competition.

 

n) The organiser must appoint at least two processing officials, who will process the winches with a single measuring apparatus, or several measuring apparatus proven to produce reproducible results within a tolerance of 0.5 %.

  o) There must be a quick release mechanism on the power lead to the battery in order to remove power from the motor in an emergency. (Connections to the battery must be removable without the need for tools). If slotted pole shoes are used then both of them have to be slotted.

p) The flight is penalised with 1000 points if the winch is not in accordance with the rules; this is valid for the flight before the test. The penalty of 1000 points will be a deduction from the competitor’s final score and shall be listed on the score sheet of the round in which the penalisation was applied.

  q) After release of the model aircraft from the towline, the towline must be rewound without delay by operating the winch, until the parachute arrives at the turnaround device. During this procedure the towline should be guided by a helper to avoid damage to other competitors’ towlines. The towline must be provided with a measure eg a stopper or a metal ring, to prevent it being drawn down through the towline pulley. Then, the towline(s) must be retrieved by hand to the winch. A winch must not be operated when the towline is lying on the ground and across other towlines or strikes another towline during launching

 

r) The towline (which must be of non-metallic material except for linkages) must be equipped with a pennant having a minimum area of 5 dm2 . A parachute (5 dm2 minimum area) may be substituted for the pennant provided it is not attached to the model aircraft and remains inactive until the release of the cable. During complete rewinding of the line on to the winch, the parachute, if used, must be removed and inactivated. 

s) In the case of Continental and World Championships, a maximum of six winches and six batteries may be used during the competition by any complete team (3 pilots). Interchanging among winches and batteries while keeping compliance with the minimum resistance rule is totally under the responsibility of the team. Class F3B Multi-Task Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 14 5.3.2.3. Task A - Duration

 

a) This task must be completed within 12 minutes from the order of the starter, including the towing time.

b) One point will be awarded for each full second from the time the model aircraft is free flying to the time the model aircraft comes to rest, up to a maximum of 600 points (i.e. 10 minutes maximum), for each full second of flight within the working time; no points will be awarded for flight time in excess of working time. The free flying of the model aircraft commences when the model aircraft is released from the towline.

c) One point will be deducted for each full second flown in excess of 600 seconds (10 minutes).

d) Additional points will be awarded for landing, depending upon distance from the spot marked by the organiser, according to the following table: Distance from spot (m) Points Distance from spot (m) Points 1 100 9 60 2 95 10 55 3 90 11 50 4 85 12 45 5 The distance is measured from the model aircraft nose when at rest to the centre of the spot. No points will be awarded for the quality of landing. No landing bonus will be awarded if the flight time exceeds 630 seconds. The measured distance is rounded to the nearest higher metre.

e) For model aircraft still in the air when the 12 minutes expire, the elapsed flight time only will be taken into consideration for scoring, without any additional points for the precision landing.

  f) A classification based on decreasing number of points awarded will be compiled, called "Partial Score A" - see 5.3.2.6. 5.3.2.4. Task B - Distance 

a) This task must be completed within 7 minutes from the order of the starter, including towing time. The trial begins only after the glider has been released from the tow.

 

  b) When the model aircraft, in flight, first crosses Base A (imaginary vertical plane) in the direction to Base B, the actual flight time of 4 minutes maximum starts, during which time the model aircraft must complete as many legs as possible from the starting Base A to Base B and conversely.

  c) A visual system or a combined audiovisual system announces to the competitor when his model aircraft crosses the Base A or Base B (imaginary vertical planes). The absence of a signal will indicate that the model aircraft has failed to correctly cross the base. The instruments used to check the crossing of the vertical planes must assure the parallelism of such planes. Timing and signalling shall occur when any part of the model aircraft crosses the base. If an audiovisual system is used, signalling is also valid when the audio system fails. 

d) The model aircraft must be identified by the contest director or the flight-line manager to the judges at Base A and B during the launch. For this procedure the competitor or his helper must announce clearly the intention to start by calling their allocated signal (alpha, bravo. charlie, delta, echo or foxtrot). When he receives permission from the contest director or the flight-line manager to start, he must do so immediately otherwise another competitor will receive permission to start. If a competitor starts without official permission he will be called back and must land and again request permission to start. The competitor must stay within a distance of 10 metres either side of Base A during the timed flight. cont/… Class F3B Multi-Task Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 15 e) For a model aircraft which lands within 4 minutes flight time only the full 150 metre legs will be counted. For model aircraft still in the air when the 4 minutes flight time or 7 minutes expires, whichever comes first, only the completed legs at that moment will be taken into account.

 

f) After having completed the task, the model aircraft must land in the area(s) determined by the contest director outside the safety area(s) otherwise the flight will be penalised with 100 points The penalty of 100 points will be a deduction from the competitor’s final score and shall be listed on the score sheet of the round in which the penalisation was applied

 

g) A classification based on decreasing number of total flown legs during the flight time will be compiled, and points given as described in 5.3.2.6., thus establishing the “Partial Score B".

 

5.3.2.5. Task C - Speed

 

a) This task must be completed within 4 minutes, from the order of the starter including towing time. The trial begins only after the glider has been released from the tow. After release of the tow-hook, the model aircraft must start the task at Base A within one minute. If the one minute period expires before the model aircraft has crossed Base A for the first time, flying from Base A to Base B, then the model aircraft must be landed and re-launched within the original working time period.

  b) The task consists of flying the distance starting from Base A, to Base B, and conversely, four legs in the shortest possible time.

 

c) The flight time is recorded to at least 1/100 s when in flight the model aircraft first crosses Base A and completes four legs of the 150 metre course.

  d) An audio system will inform the competitor when the model aircraft crosses the Base A or Base B (imaginary vertical planes). The absence of a signal will indicate that the model aircraft has failed to correctly cross the Base. The instruments used to check the crossing of the vertical planes must assure the parallelism of such planes. The signal is given when any part of the model aircraft crosses the base. The source of the signal (horn, loudspeaker) must not be further then 30 metres away from the intersection of base A and the safety plane. 

e) During the timed flight the competitor must stay within a distance of 10 metres either side from Base A.

f) After having completed the task, the model aircraft must land in the area(s) determined by the contest director outside the safety area(s).

g) Model aircraft which come to rest before having completed the task will score zero. 

h) During task C the timed flight shall take place to one side of the safety plane, whilst all judges/time-keepers shall remain on the other side of the safety plane. The side which is to be flown shall be indicated by the organisers taking into account the direction of the sun, etc. The flight will be penalised with 300 points, when sighted by means of an optical aid, the safety plane is crossed by any part of the model aircraft. The instrument used to check the crossing of the vertical safety plane must also assure that the safety plane is orthogonal to Base A and Base B. The penalty of 300 points will be a deduction from the competitor’s final score and shall be listed on the score sheet of the round in which the penalisation was applied.

 

  i) After release of the tow-hook, when the model aircraft has crossed Base A for the first time, flying in the direction from Base A to Base B, no further attempt is permitted unless the competitor signals his intention to re-launch before Base A is crossed.

j) A classification based on increasing times to complete the four 150 metre legs will be compiled, and points given as described in 5.3.2.6., thus establishing "Partial Score C".

 

5.3.2.6. Partial Scores For each task the winner of each group receives 1000 points.

a) Partial Score A for each competitor is determined as follows: Partial Score A = PW P1 1000? Where P1 = points of the competitor obtained as 5.3.2.3. P = points of the winner in the related group. cont/… Class F3B Multi-Task Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 16 b) Partial Score B for each competitor is determined as follows Partial Score B = DW D1 1000? Where D1 = distance covered by the competitor as for 5.3.2.4 D W = distance covered by the winner in the related group.

 

c) Partial Score C for each competitor is determined as follows Partial Score C = 1 1000 T TW ? Where T1 = time of the competitor as for 5.3.2.5. T W = time of the winner in the related group. 5.3.2.7. Total Score The competitor’s Total Score for each round is compiled by adding the Partial Scores of all tasks.

5.3.2.8. Classification If only five rounds are flown, the competitor’s classification is determined by the sum of all Total Scores for each round. If more than five complete rounds are flown the lowest partial score of each task is omitted from the sum of all partial scores. To decide the winner when there is a tie, the two (or all who have the equal score) competitors will fly an additional round (three tasks). 5.3.2.9. Site The competition must be held at a site having reasonably level terrain, with a reasonably low probability of slope or wave soaring.

Available from:

X-Dream 2000

 

The X-Dream 2000 eRES model is a laser cut balsa kit from Germany purpose designed for the popular eRES class of electric powered 2 metre gliders

 

Features

• Laser cut balsa kit
• Lightweight and strong
• 3 piece wing
• Removable stabiliser
• Very competitive eRES model

The X-Dream 2000 eRES model is the latest development by Alois Janowetz, the legendary designer of the Minores, X-res and Desire.

The X-Dream 2000 impresses with its balanced flight characteristics and its performance potential. The model is very manoeuvrable and is extremely easy to hold. Both in calm weather, as it usually happens in the morning and evening in competitions, as well as in strong winds, the X-Dream 2000 shows its strengths and masters the challenges of different weather conditions in an exemplary manner and shows its excellent gliding performance.

In order to improve the wing loading and thus the penetration in stronger winds, provision is made to fit ballast ranging from 50 to 165g weight is possible.

With the large 2-part spoilers, almost vertical descents are possible without a big increase in airspeed or loading up the air frame. The wing is in 3 parts and the horizontal stabiliser is removable.

The laser-cut kit is characterised by a very simple and robust structure. With the exception of the 6 mm CFRP rods for the wing joint, the CFRP fuselage tube and the GFRP rocker for the pendulum horizontal stabiliser, only selected balsa and plywood that have been optimised for weight are used.

As a result, the bonding of all components with commercially available systems such as superglue, white glue or 5-min epoxy is very easy and the processing of the materials is problem-free.

Due to the ingenious construction and the exclusive use of weight-optimised materials, a take-off weight of around 450g and thus a wing loading of only 12 g / dm² out of the box is possible (varies with your choice of motor and battery).
Ultracote Lite is recommended for the covering.

The model is designed for the advanced model maker. Assembling requires experience and understanding of building balsa/plywood structures.

What you need

• Radio system
• 4 x servos (1 x rudder, 1 x rudder, 2 x spoiler)
• Motor
• ESC
• Battery
• Charger

 

Specs

Available from:

Jeti 7 channel RX

7 channel full-range receiver compatible with JETI EX & EX Bus protocols. Supports telemetry functions.

Features

• PPM input
• PPM output
• Integrated expander for EX & EX Bus devices
• UDI digital output
• Lightweight, compact size
• Dual receiver antennas
• Telemetry compatible

JETI Duplex receivers are designated for use with the DC/DS transmitters or the JETI transmitter modules in the 2.4 GHz frequency band.

The receivers support online updates so that everyone is able to install the latest software versions. From the very beginning bidirectional transmission has been a distinctive feature of the Duplex system, this not only handles telemetry data, but it also helps to ensure secure primarily transmission safety between the transmitter and receiver.

The Duplex EX telemetry system uses an open protocol. This gives the advantage of compatibility with a large number of telemetry sensors from both JETI model and third party producers. For the display of telemetry data you can use purposely designed equipment like the JETIBOX profi and DC/DS transmitters or you can display the data on PCs.

Specs

Available from:

Jeti Vario RX

Overview

MVario2 EX is a system that measures atmospheric pressure and using the obtained data it calculates the altitude above sea level, airspeed, and the rate of climb as well as the rate of descent. Changes in climb and descent rates are signalled as well. The sensor also alerts you if any alarm setting is exceeded. The sensor data can also be transmitted via the Duplex system to the user.

 

Features

• Measurement of altitude, pressure, and temperature
• Very accurate and fast indication of climb and descent
• Possible sound alarm signalling using a JETI Tx module (EU only) or JETIBOX profi
• Possibility to be used as an Expander and to connect other sensors
• Adjustable compensation of energy (TEK) via MSPEED EX sensor
• Possibility to be used as an altitude switch in FAI F5J or ALES competition categories
• The device is compatible with EX Bus protocol, i.e. it is possible to be configured comfortably via a special menu in DC/DS JETI model transmitters
• Firmware updates

The Duplex system takes advantage of the 2.4GHz band for communication. This system not only transmits control data to the model but also sends data from the model back to the transmitter. The telemetry data collected during operation is shown as actual, measured values in real time on either LCD screen of a connected JETIBOX or on the DC/DS JETI model transmitters.

Specs

 

Resolution of measured height

0.1m

Typical noise ratio in height changes measurement

±0.05m/s

Measurement range

450÷1100hPa

Thats all from the Thermal Circle happy safe and successful soaring. Hayden Daley 2022

Available from: