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F3j - Thermal duration

F3j - Thermal duration

Events: 6

Flying rules for F3J are quite straight-forward and require as much flight time as possible in a ten minute “slot” period ending with a precision landing.  The gliders are flown in groups (usually of between six and ten models at a time) so as to neutralise the effect of any one slot having nothing but “poor air” so resulting in nothing but low flight times for that slot.  The model should be landed close to a marked target spot to get landing bonus points.  In competitions, launching is generally accomplished in Australian events with a power winch but hand towing (150 metre line) is a requirement for international status events and two persons are allowed to tow. 

These two tow men generally use a pulley and stake and, by so doing, even more power can be injected into the model than from a power winch giving rise to quite spectacular launches.  Because the flyers believe that some of the group who will find thermal air to allow for a ten minute flight (and they can re-launch if they choose anyway), flyers will launch simultaneously at the start of the slot time; this gives a quite spectacular start to the slot and the landings, if multiple models fly out the ten minutes can be equally exciting.

Show Events


Date Title Venue City
14.01.2018 Thermal #4 Diggers Rest Diggers Rest Field Diggers Rest
25.01.2018 - 28.01.2018 Thermal #5 Armidale NSW Armidale contest site -
10.03.2018 - 11.03.2018 Thermal #6 Milang SA Milang Milang

F3k - Handlaunch

F3k - Handlaunch

Events: 6

A Discus Launch Glider (DLG) is a radio controlled model sailplane  launched using a 'discus launch' in which the glider is held by a wingtip and rotated around the flyer by hand before release. Using this method of launching the average flier can achieve launch heights of greater than 140 feet (43 m), with the better throwers exceeding 200-foot (61 m) high launches.

The discus method of hand launching has now in effect replaced the older 'javelin style' launch, where a hand launched model glider would be launched over-arm, like a javelin would be thrown. The discus launch is far easier, more efficient and less physically demanding than the javelin launch.

F3K is the international contest class for radio controlled, hand-launched model gliders.

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Date Title Venue City
21.01.2018 F3K #4 (Full Day) Diggers Rest Diggers Rest Field Diggers Rest
18.02.2018 F3K #5 (Full Day) Diggers Rest Diggers Rest Field Diggers Rest
18.03.2018 F3K #6 (State Championships) Diggers Rest Diggers Rest Field Diggers Rest

F5J & ALES - Electric Thermal Glider

F5J & ALES - Electric Thermal Glider

Events: 5

F5J is an electric motor launched version of F3J.  No high cost motor/battery combination is needed and the maximum wing span is 4 metres.
The maximum (and only) motor run allowed is 30 seconds.  There is a penalty based on the maximum height reached from launch to 10 seconds after the motor is turned off. Normally 0.5 points up to 200 metres and 3.0 points for each metre over 200 metres.  There is a device in each model that records the height during the launch phase of the flight and allows only one motor run up to 30 seconds.  There is no penalty related to motor run time.The flight target time is 10 minutes measured from the time the model leaves the hand to the time the model touches the ground.  No landing bonus if the flight time exceeds 10 minutes. The landing bonus is a maximum of 50 points.The aim is to use the minimum launch height needed to achieve the 10 minutes, and this is a matter of fine judgement since there is only one motor run.

ALES (Altitude Limited Electric Soaring) is a competition class for electric powered gliders. Gliders are all flown to a set altitude where the motor is turned off for the remainder of the flight. A thermal duration task is then flown and the flight ends with a precision landing component.

Show Events


Date Title Venue City
25.01.2018 - 28.01.2018 F5J #4 Armidale NSW Armidale contest site -
09.03.2018 F5J #5 Miland SA Milang Milang
08.04.2018 F5J #6 (State Championships) Brewster/Ballarat Ballarat Aeromodellers Inc (new field 2016) Brewster