29-Jun-22 - 10:22 AM

Thermal Circle Text - Thermal Circle 37

Written by Hayden Daley - 18 February, 2022.

Welcome to this edition of the Thermal Circle in this edition we have the F3J rules edited from the FAI website. Model Flight has landed new shipments and many products are back in stock and four new products are covered in the text below. Many thanks to the Model Flight Company also known as OMP for the use of the text provided in this edition.

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CLASS F3J - THERMAL DURATION GLIDERS

 

To provide a man-on-man contest for competitors flying radio-controlled thermal duration soaring gliders. In the contest, several qualifying rounds are flown. For each qualifying round, competitors are divided into groups. The scores in each group are normalised to give them meaningful scores irrespective of changing weather conditions during a round. The competitors with the top aggregate scores in the qualifying rounds then fly at least two further fly-off rounds as a single group to determine the final placing. The scheduled number of fly-off rounds shall be announced by the Contest Director before the start of the contest.

 

  5.6.1. General Rules

 

5.6.1.1. Definition of a Radio Controlled Glider A model aircraft which is not provided with a propulsion device and in which lift is generated by aerodynamic forces acting on surfaces remaining fixed. 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.

5.6.1.2. Prefabrication of the Model aircraft Paragraph B.3.1

a) of Section 4, Part 2 (builder of the model aircraft) is not applicable to this class. 5.6.1.3. Characteristics of Radio Controlled Gliders 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

 

b) The radio shall be able to operate simultaneously with other equipment at 10 kHz spacing below 50 MHz and at 20 kHz spacing above 50 MHz. When the radio does not meet this requirement, the working bandwidth (max. 50 kHz) shall be specified by the competitor.

c) Any technological device used to aid in supplying data of the air’s condition or direct feedback of the model’s flight status is prohibited during the flight. These devices include any transmission or receiving devices not used to directly control the model aircraft (telephones, walkie-talkies, telemetry of airspeed and altitude etc), temperature detecting devices (thermal imaging cameras, thermometers etc), optical aids (such as binoculars, telescopes etc), and distance/altitude measuring devices (GPS, laser range finders etc). Telemetry of signal strength at the aircraft receiver and state of the receiver battery is permitted. Use of corrective eyeglasses and sunglasses are permitted. If an infringement of this rule occurs, the pilot will be disqualified from the contest.

d) The competitor may use three model aircraft in the contest.

  e) The competitor may combine the parts of the model aircraft during the contest, provided the resulting model aircraft conforms to the rules and the parts have been checked before the start of the contest.

f) For the sake of randomness of the starting order among the successive rounds, each competitor must enter three different transmitter frequencies with 10 kHz minimum spacing. The organiser is entitled to use any of these three frequencies for setting the flight matrices. Once the competitor is given one of these three frequencies he must not change to another frequency for all flights during the whole of the preliminary rounds other than for re-flights. In case of a re-flight the competitor can be called to use either of these three frequencies for this re flight only, as long as the call is made at least 1/2 hour prior to the beginning of the re flight in written form to the competitor (or team manager when applicable). 

 

g) All ballast must be carried internally and fastened securely within the air frame.

h) No fixed or retractable arresting device (i.e. bolt, saw tooth-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 protuberances other than the tow hook and surface control linkages (with or without fairings). The tow hook must not be larger than 5 mm in frontal width and 15 mm frontal height. Class F3J Thermal Duration Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 18

 

5.6.1.4. Competitors and Helpers

a) The competitor must operate his radio equipment himself.

b) Each competitor is allowed three helpers. When a team manager is required, he is also permitted to help the competitor. A maximum of two helpers are permitted for towing during the launch as described in 5.6.8.2.

5.6.2. The Flying Site

5.6.2.1. The competition must be held on a site having reasonably level terrain, which will minimise the possibility of slope and wave soaring.

5.6.2.2. a) The flying site shall include a marked launch corridor of 6 metres width with a central launch line. The launching corridor shall be arranged crosswind and shall include launch marks on the central launch line at least 15 metres apart, one for each competitor of a group.

b) The flying site shall include landing spots, one for each competitor in a group. Each landing spot will correspond to one of the launching marks and will be arranged at least 30 metres downwind of the launching corridor. 5.6.2.3. The centres of the landing circles and the launch line must always be marked. At the discretion of the Contest Director, marks indicating the circumference of the circles may be omitted and replaced by the use of other means of measuring, such as a tape, to check distances from the centre of the circles. 5.6.2.4. Safety Rules

a) Contact with an object within the defined safety area (including the launch corridor) will be penalised by deduction of 300 points from the competitor’s final score. 

b) Contact with a person within the defined safety area (including the launch corridor) will be penalised by deduction of 1000 points from the competitor’s final score. 

c) For each attempt only one penalty can be given, If a person and at the same attempt an object is touched the 1000 points penalty is applied.

e) Penalties shall be listed on the score sheet of the round in which the infringement(s) occurred.

f) If necessary the organiser may define a part of the airspace as safety space. In such a case he must appoint at least one official who observes the border (vertical plane) by a sighting device. This official must warn the pilot if his glider crosses the border. If the glider does not leave the safety space immediately a penalty of 300 points is given. 5.6.3. Contest Flights 5.6.3.1. a) The competitor will

5.6.3.1.

a) The competitor will be allowed a minimum of five (5), preferably more, official flights.

b) The competitor will be allowed an unlimited number of attempts during the working time.

c) There is an official attempt when the model aircraft has left the hands of the competitor or those of a helper under the pull of the towline.

d) In the case of multiple attempts, the result of the last flight will be the official score.

e) All attempts are to be timed by two stopwatches. If no official time has been recorded, the competitor is entitled to a new working time according to the priorities mentioned in paragraph 5.6.4. 5.6.4. Re-flights The competitor is entitled to a new working time if: 

a) his model in flight or in the process of being launched collides with another model in flight, or with a model in the process of being launched.

b) his model in flight or in the process of being launched collides with another competitor’s towline.

c) the competitor’s towline is hit by another model in flight or in the process of being launched.

d) the attempt has not been judged by the official time-keepers.

e) his attempt was hindered or aborted by an unexpected event, not within his control. Crossed lines are not considered as reason for re-flight.

  f) A towline (other than his own) was not removed after launch and is blocking (covering) his own towline.

 

Class F3J Thermal Duration Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 19 To claim a re-flight considering the above mentioned conditions, the competitor has to make sure that the official timekeepers have noticed the hindering conditions and land his model as soon as possible after this event.

Note that in the case the competitor continues to launch or continues to fly after hindering conditions affected his flight or does re-launch after clearing of the hindering condition(s), he is deemed to have waived his right to a new working time. The new working time is to be granted to the competitor according to the following order of priorities: 1. in an incomplete group, or in a complete group on additional launching/landing spots; 2. if this is not achievable, then in a new group of several (minimum 4) re-flyers.

The new group of re-flyers will be completed by other competitors selected by random draw to the number of 4. If the frequency or team membership of the drawn competitor does not fit or the competitor will not fly, the draw is repeated; 3. if this is also not achievable, then with his original group at the end of the ongoing round. In priority-case 2 and 3, the better of the two results of the original flight and the re-flight will be the official score, except for the competitors who are allocated the new attempt. For those the result of the re-flight is the official score. A competitor of this group who was not allocated the new attempt will not be entitled to another working time in case of hindering.

5.6.5. Cancellation of a flight and/or disqualification

 

5.6.5.1. a) The flight is cancelled and recorded as a zero score if the competitor used a model aircraft not conforming to any item of rule 5.6.1. 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 is annulled and recorded as a zero score if the model aircraft loses any part during the launch or the flight, except when this occurs as the result of a mid-air collision with another model aircraft or towline.

c) The loss of any part of the model aircraft during the landing (coming into contact with the ground) is not taken into account.

d) The flight is cancelled and recorded as a zero score if the model aircraft is piloted by anyone other than the competitor.

e) The flight is cancelled and recorded as a zero score if, during landing, some part of the model aircraft does not come to rest within 75 metres of the centre of the competitor's designated landing circle.

5.6.5.2. Neutralisation of a flight group During th 5.6.5.2. Neutralisation of a flight group During the fly-off rounds and for the last group of a qualification round, and only within the first 30 seconds of the working time, the Contest Director has the right to neutralise the ongoing flight group in events leading to a reflight according to 5.6.4

  a) – e). If an event according to 5.6.4.a) – e) occurs within the first 30 seconds of the working time, the Contest Director needs to: state the immediate neutralisation of the group clearly to all competitors; stop the running working time; call all competitors to land as soon as possible. This round will be started again with the preparation time as soon as possible. cont/… Class F3J Thermal Duration Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 20 5.6.6. Organisation of the Flying. 5.6.6.1. Rounds and Groups

a) The flying order for the initial qualifying rounds shall be arranged in accordance with the transmitter frequencies in use to permit as many simultaneous flights as possible. A minimum of 6 and preferably 8 to 10 competitors should be scheduled for each group.

  b) The flying order shall be scheduled in rounds sub-divided into groups.

  c) The flying order shall be determined by a matrix system that minimises situations where competitors fly together more than once (see paragraph 5.6.12.3).

 

5.6.6.2. Flying in Groups a) Competitors are entitled to five minutes preparation time, which is counted from the moment his group is called to take position at the designated launching area, to the start of the group's working time.

b) The working time allowed to each competitor in a group shall be of exactly ten (10) minutes duration.

c) The organisers must positively indicate the start of a group's working time, by audible signal; see 5.6.12.1 for details.

d) Audible and visual signals must be given when eight (8) minutes of the group's working time has elapsed.

  e) The end of the group's working time must be positively indicated by audible signal, as for the start. f) Any model aircraft airborne at the completion of the working time must land immediately. 5.6.7.

 

Control of Transmitters 5.6.7.1.

 

  a) The Contest Director will not start the contest until all competitors have handed over all transmitters to the organisers.

b) Failure to hand in a transmitter before the official starting time of the contest may result in the competitor forfeiting his first round flight.

c) Any test transmission during the contest without permission of the Contest Director is forbidden and will result in disqualification.

d) The competitor must hand over his transmitter to the designated official (usually the timekeeper) immediately after finishing his flight.

 

5.6.8. Launching 5.6.8.1.

 

At all times, the models must be launched upwind in the marked launching corridor (5.6.2.2). An attempt is annulled and recorded as zero if the model aircraft is launched outside the launching corridor. 5.6.8.2. The launch of the model aircraft will be by hand held towline only. 5.6.8.3.

a) Tow persons are allowed no mechanical aids, other than pulleys, to facilitate towing but may use a hand reel (hand winch) to recover the towline after launching is complete. 

b) Immediately after release of the model aircraft from the launching cable, without delay the towline helpers must either recover the towline on a hand reel (hand winch) or, when a pulley is used, they must continue to pull the towline until it is completely removed from the towing area in order to avoid crosscutting with other lines which are still in a state of towing or will be used for towing. This is not applicable if a line break occurs. In this case only the residual line attached to the ground or used by the towing helpers has to be removed from the launching area. A designated judge (launch line-manager) has to overview and control and, if necessary, - call on towline helpers to remove their lines from the launching area after the model aircraft is released. If his demand is refused, then the pilot, whose towline helpers refused, shall be penalised by 100 points.

 

  c) If towing with pulley, behind the pulley an unbreakable shield with diameter of minimum 15 cm must be fixed to protect the towing helpers against broken whipping line ends. In the case of towing with a pulley two helpers have to operate the pulley and one of the following preventive measures must be taken: cont/… Class F3J Thermal Duration Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 21 ? The pulley and protective shield must be connected to a 5 mm minimum diameter cord arranged in a V , the arms of which must have a length of 1,5 to 3,0 metres and with hand loops on each end; or ? The pulley and protective shield must be connected to the centre of a sufficiently strong yoke of minimum 80 cm length with handholds at each end. In the case of towing with a pulley, the towline end must be attached to a ground anchor, which is fixed by metal ropes to two additional safety pins. The length of the main stake must be at least 50 cm from the towline linkage. The safety stakes must be at least 30 cm long. The main stake must be driven into the ground to a depth at least 40 cm. The towline linkage must not exceed 10 cm above the ground. The ground anchor-dimensions and its setup could look like as shown in the drawing "Guideline for proven ground anchor setup".

 

  5.6.8.4. The Contest Director will designate a launching area.

 

Tow-persons must remain within this area whenever they are launching a model aircraft. 5.6.8.5. The launching device (hand-reel, pulley, anchor, if used, and all other equipment used during launch, except the launching cable with or without any attachment of maximum 5 cm3 or 5 grams) must neither come loose nor be released by the competitor or his helpers during the launch. The competitor will be penalised by the cancellation of his flight and no other attempt is permitted.

5.6.8.6. Any model aircraft launched prior to the start of a group's working time must be landed as soon as possible and re-launched within the working time. Failure to comply will result in cancellation of the competitor's score for that round. 5.6.8.7. Towlines

a) Tow-lines for each competitor must be laid out only during the competitor's five-minute preparation time and must be retrieved by the end of his working time.

  b) The length of the towline shall not exceed 150 metres when tested under a tension of 20 N.

c) The towline must be made of polyamide monofilament material throughout its length. It must have pennant with an area of 5 dm2. A parachute (of five (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 towline. Linkages (couplings, knots, loops, etc.) of different material are permitted up to a total length of 1.5 metres. They shall be included in the total length of 150 metres. 5.6.9. Landing 5.6.9.1. Before the contest commences, organisers must allocate a landing circle to each competitor. It is the competitor's responsibility to ensure that he always uses the correct circle for landing.

5.6.9.2. Officials (timekeepers) must remain upwind of the 15 metre radius circle during the working time before the landing.

 

The competitor and one helper are allowed inside the 15 metre radius circle.

5.6.9.3. After landing, competitors may retrieve their model aircraft before the end of their working time providing they do not impede other competitors or model aircraft in their group. 5.6.10. Scoring 5.6.10.1. The attempt will be timed from moment of release from the launching device to either:

a) the model aircraft first touches the ground; or

  b) the model aircraft first touches any object in contact with the ground. Parts of launching devices (tow-lines) extending away from the ground shall not be interpreted as objects in contact with the ground.

c) completion of the group's working time. 5.6.10.2. The flight time in seconds shall be recorded to one decimal place. 5.6.10.3. A penalty of thirty (30) points will be deducted from the flight score for overflying the end of the group's working time for up to a maximum of one (1) minute. 5.6.10.4. A zero score will be recorded for overflying the end of the group's working time by more than one (1) minute. Cont/…

 

  Class F3J Thermal Duration Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 22 5.6.10.5. A landing bonus will be awarded in accordance with distance from the landing spot marked by the organisers according to the following tabulation: Distance from spot (meters) points Distance from spot (meters) points up to m Points up to m Points 0.2 100 5 80 0.4 99 6 75 0.6 98 7 70 0.8 97 8 65 1.0 96 9 60 1.2 95 10 55 1.4 94 11 50 1.6 93 12 45 1.8 92 13 40 2.0 91 14 35 3 90 15 30 4

 

b5.6.10.6. The distance for landing bonus is measured from the model aircraft nose at rest to landing spot allocated to the competitor by the organisers.

 

5.6.10.7. A contest number, derived from the matrix, must be allocated to each competitor, which must be retained throughout the qualifying rounds.

5.6.10.8. If the model aircraft touches either the competitor or his helper during the landing manoeuvre, no landing points will be given.

5.6.10.9. No landing bonus points will be awarded if the model aircraft overflies the end of the group's working time.

5.6.10.10. The competitor who achieves the highest aggregate of points comprising of flight points plus landing bonus points minus penalty points will be the group winner and will be awarded a corrected score of one thousand points for that group.

  5.6.10.11. The remaining competitors in the group will be awarded a corrected score based on their percentage of the group winner's total score before correction (i.e. normalised for that group) calculated from their own total score as follows: The corrected score shall be recorded (truncated) to one place after the decimal point. 5.6.11. Final Classification

5.6.11.1.

a) If seven (7) or fewer qualifying rounds are flown, the aggregate score achieved by the competitor will be the sum of these scores for all rounds flown. If more than seven rounds are flown, then the lowest score will be discarded before determining the aggregate score.

b) At the end of the qualifying rounds, a minimum of nine (9) competitors with the highest aggregate scores will be placed together in a single group to fly the fly-off rounds. At the organiser's discretion, if frequencies permit, the number of competitors qualifying for the fly-off may be increased.

5.6.11.2. The working time for each competitor who qualifies for the fly-off rounds will be of fifteen (15) minutes duration. As before, audible signal will be given at the start of the group working time, at exactly thirteen (13) minutes and at exactly fifteen (15) minutes.

5.6.11.3. The scoring of the fly-off rounds shall be as in section 5.6.10. cont/…/ Competitor’s own score multiplied by 1000 Highest points total scored in the group before correction Class F3J Thermal Duration Gliders SC4_Vol_F3_Soaring_13 Effective 1st January 2013 Page 23

5.6.11.4. Final placing of the competitors who qualify for the fly-off shall be determined by scores in fly-off; their scores in the qualifying rounds being discarded. If less then six (6) fly-off rounds are flown their aggregate scores over the fly-off rounds is counted, if six (6) or more fly-off rounds are flown the worst result of each competitor is discarded. In the event that two or more competitors have the same aggregate fly-off score, final positions of those competitors shall be determined by their respective position in the qualifying rounds; the higher positioned competitor being awarded the higher final position. 5.6.12. Advisory Information

 

 

Organisational Requirements a) The organisers shall ensure that each competitor has no doubt about the precise second that the group's working time starts and finishes.

b) Audible indication may be by automobile horn, bell or public address system etc. It must be remembered that sound does not travel far against the wind; therefore the positioning of the audio source must be given some thought.

  c) To be a fair contest, the minimum number of fliers in any one group is four. As the contest proceeds, some competitors may be obliged to drop out for various reasons. When a group occurs with three (3) or fewer competitors in it, the organisers move up a competitor from a later group, ensuring if possible, that he has not flown against any of the others in previous rounds and of course that his frequency is compatible.

5.6.12.2. Time-keeper Duties a) Organisers must make sure that all who are to act as timekeepers are fully aware of just how important their duties are and to make certain that they are conversant with the rules particularly those that require quick positive action in order not to jeopardise a competitor's chances in the contest.

b) The timekeepers will be responsible for handing transmitters to competitors prior to the start of the working time and for returning them to Control immediately after the end of the flight.

c) The organisers must ensure that an official is nominated to note any competitor who overflies the end of the group's working time and to time his excess flight time.

 

5.6.12.3 Groups

 

a) The composition of groups should minimise the situations where any competitor flies against another many times, except in the fly-off. It is recognised that, in practice, with certain numbers of competitors or where more than three rounds are flown, a situation where a competitor flies against another more than once may be unavoidable. This must be kept to a minimum.

b) In order to minimise the time needed to run the contest, it is very important to arrange the starting order to get the minimum number of groups per round, with the maximum possible competitors in each group. It is recommended that groups with vacant starting positions are put at the end of each round, to keep space free for any reflights.

c) The starting order has to ensure that, as far as possible, there are no competitors of the same team.

Available from:

E-Flite Power 60 Brushless Outrunner Motor 400 Rpm/V

  Features

  • Equivalent to a 60-size glow engine for 6 to 10 lb (2.7 to 4.5 kg) airplanes
  • Ideal for 46-size 3D airplanes up to 7 lb (3.2 kg)
  • Ideal for models requiring up to 1700 watts of power
  • High-torque, direct-drive alternative to inrunner brushless motors
  • Includes mount, prop adapters and mounting hardware
  • External rotor design—6mm shaft can easily be reversed for alternative motor installations
  • Slotted 14-pole outrunner design
  • High-quality construction with ball bearings and hardened steel shaft
  • Quiet, lightweight operation

Ideal for 60-size sport and scale airplanes weighing 6- to 10-pounds (2.7–4.5 kg), 46-size 3D airplanes up to 7 pounds (3.2 kg), or models requiring up to 1700 watts of power.

Available from:

E-Flite Power 160 Brushless motor, 2700 watts, suit Models to 9kg


Features

  • Equivalent to or surpassing the power of a 160-size, 2-stroke, glow engine for 12–20 lb (5.4–9 kg) airplanes
  • Ideal for 3D airplanes up to 15 lb (6.8 kg)
  • High-torque alternative to inrunner brushless motors
  • Includes mount and mounting hardware
  • External rotor design for better cooling
  • High-quality construction with ball bearings and hardened 8mm steel shaft
  • Includes two 12mm prop shaft adapters tapped out for 10–32 threads
  • Ideal for models requiring up to 2700 watts of power
  • Slotted 14-pole outrunner design

Ideal for 160-size sport and scale airplanes weighing 12 to 20 lb (5.4–9 kg), 3D airplanes up to 15 lb (6.8 kg), or models requiring up to 2700 watts of power. 

Available from:

Multiplex Roxxy C35-48 1150kv Brushless Motor

 

Width

35 mm

Length

45 mm

Weight

0.169 kg

Motor type

brushless OR

Motor size diameter

35 mm

Revolutions per volt

1150

Motor shaft diameter

5 mm

Voltage range in V

7-12V Motor

Power in watts

450

Available from:


Multiplex Roxxy C35-48 1150kv Brushless Motor 

 

E-Flite Park 400 Brushless Outrunner Motor, 740Kv

Features

  • Slotted 12-pole outrunner design
  • Prop adapter (EFLM1923) and gold-plated connectors included
  • Excellent motor for small 3D and scale park flyers weighing 10–20 oz (280–560 g)
  • Motor mount included
  • Replacement for Speed 370 and Speed 400 applications
  • Quiet operation\low noise compared to gearbox systems

The great performance and small size of this engine makes it perfect for small 3D and other park flyer models. The external rotor design eliminates the need for a gearbox, saving you valuable weight to get the maximum performance out of the model. 

Available from:

E-Flite Power 90 Brushless Outrunner Motor 325 Kv

Designed to deliver clean and quiet power equivalent to or surpassing the power of a 90-size 2-stroke glow engine for sport and scale airplanes weighing 8 to 13 pounds (3.6 to 5.9 kg), 3D airplanes up to 10 pounds (4.5 kg), or models requiring up to 1800 watts of power. It will provide excellent 3D performance for the Hangar 9 Frenzy 100 ARF, ShowTime 4D 90 ARF, Funtana X 100 ARF and other similar class models. The Power 90 also provides great power and performance for the Seagull Ultimate Bi-Plane 90 ARFs.

Features

  • Equivalent to or surpassing the power of a 90-size, 2-stroke, glow engine for sport and scale airplanes weighing 8 to 13 lb (3.6 to 5.9 kg)
  • Ideal for 3D airplanes weighing up to 10 lb (4.5 kg)
  • Ideal for models requiring up to 1800 watts of power
  • High torque, direct drive alternative to inrunner brushless motors
  • External rotor design for better cooling
  • High-quality construction with ball bearings and hardened 6mm steel shaft
  • Includes mount and mounting hardware with two 10mm prop shaft adapters tapped out for 8-32 threads
  • Slotted 14-pole outrunner design
Available from:

E-Flite Park 250 Brushless Outrunner motor; 2200Kv

Features

  • Ideal for 3D models 4–6 oz (115–170 g) and sport and scale models 6–12 oz (170–340 g)
  • Up to 55 watts
  • Designed for firewall mount or carbon tube mount
  • Integrated prop saver design
  • Extremely quiet and lightweight—just .5 ounces (14 grams)
  • Upgraded performance motor for indoor IPS and 180 motors
  • High-torque, direct-drive alternative to inrunners
  • Includes mount, mounting hardware and 2mm gold BL connectors
  • High-quality construction with ball bearings and hardened steel shaft
  • Great lightweight outrunner for small indoor foamies

Available from:

E-Flite Power 25 B/Less Outrunner Motor. 870 Rpm/V

Ideal for 25-size sport and scale airplanes weighing 3- to 5.5-pound (1.4- to 2.5-kilograms) 15-size 3D airplanes up to 3.5 pounds (1.6 kilograms), or models requiring up to 600 watts of power. 

Features

  • Equivalent to a 25-size glow engine for sport and scale airplanes weighing 3–5.5 lb (1.4–2.5 kg)
  • Ideal for 15-size 3D airplanes up to 3.5 pounds (1.6 kilograms)
  • Ideal for models requiring up to 600 watts of power
  • High-torque, direct-drive alternative to inrunner brushless motors
  • Includes mount, prop adapter and mounting hardware
  • External radial rotor design—6mm shaft can easily be reversed for alternative motor installations
  • Slotted 14-pole outrunner design
  • High-quality construction with ball bearings and hardened steel shaft
  • Quite, lightweight operation

E-Flite Park 370 BL Out,1200Kv w/4mm Hollow Shaft

Available from:

E-flite’s latest Park 370 is a brushless outrunner motor that features a 4mm hollow shaft, ideal for use with variable pitch propellers. It’s perfectly designed for electric models equipped with variable-pitch propeller systems, such as the E-flite® ShowStopper VPP system. However, you don’t need a VPP to use this motor—it’s an excellent motor for small 3D airplanes that weigh 7–14 ounces. A motor mount, prop adapter and all hardware are included. 

Features

  • Ideal for models requiring up to 120 watts of power
  • Optimized windings for 3D performance
  • High-torque, direct-drive alternative to inrunner brushless motors
  • Includes mount, prop adapters and mounting hardware
  • 4mm hollow shaft is easily reversed for alternative motor installations
  • Excellent motor for small 3D airplanes 7–14 oz (200–400 g)
  • Extremely lightweight—just 1.6 ounces
  • Ideal for variable pitch props such as the E-flite® Showstopper Variable Pitch Prop System
  • External rotor design for better cooling
  • High-quality construction with ball bearings

Available from:

E-Flite Park 450 Outrunner brushless motor, 890 rpm/V

Features

  • Extremely quiet and lightweight—just 2.5 ounces (72 g)
  • High-torque alternative to inrunner brushless motors
  • Includes mount, prop adapter and mounting hardware
  • External radial rotor design—4mm shaft can easily be reversed for alternative motor installation
  • Slotted 12-pole outrunner design
  • Ideal for 3D park flyers (15–25 oz) and scale park flyers (20–30 oz) using 2–3S 1200–2100mAh Li-Po batteries
  • Quiet, efficient operation

The Park 450 is ideal for 3D park flyers 15 to 25 ounces and scale park flyers 20 to 30 ounces, using 2S–3S 1200–2100mAh Li-Po battery packs.

It will provide sport 3D performance for a Mini Edge-size plane and great performance on the new E-flite® P-47.

Available from:

E-Flite Power 360 Outrunner Motor

 

Peace of mind is priceless and modelers who value it most choose E-flite® brushless motors. Just ask anyone who’s flown with them. E-flite brushless motors consistently provide the kind of power and reliability that transform a modeling experience—no matter what you’re flying. Whether you’re a sport modeler or scale master, E-flite has the brushless power system to truly realize your plane’s full potential.

The E-flite Power 360 brushless electric motor is designed to deliver clean and quiet power equivalent to or surpassing the power of a 360-size 2-stroke glow engine for sport and scale airplanes weighing 15 to 40 pounds (6.8 to 11.0 kg), 3D airplanes up to 25 pounds (8.28 kg), or models requiring up to 6000 watts of power. 

Features

  • Ideal for giant-scale airplanes requiring up to 6000 watts of input power
  • High-torque alternative to inrunner brushless motors
  • Designed in collaboration with World Aerobatic Champion Quique Somenzini
  • Equivalent to a 50cc–60cc gas engine
  • For high-power airplanes weighing 15 to 25 pounds (6.8 to 11.0 kilograms)
  • External rotor design for better cooling
  • Includes 4-bolt propeller mount, 12mm prop shaft center-tapped with 10–32 threads
  • High-quality construction with ball bearings and hardened 10mm steel shaft
  • Includes X-mount and 6.5mm gold bullet connectors
  • Slotted 14-pole outrunner design
  • Requires 160A–200A HV brushless ESC

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

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