T E A M
This thread to share F5J info.
F5J is a class of thermal soaring that is getting very popular, as its a very simple format and allows gliders of all types and class to participate, no need for high powered and expensive motors/escs.
Goal :
-Last 10 mins in the sky with one motor run. (15mins in finals)
-Spot landing
There is a 10 minute window for a flight. Within that window you are allowed 1 continuous motor run that must not be longer than 30 seconds (a electronic device will cut the power at 30 seconds if the pilot has not already done so). The maximum altitude the model reaches, during the period from launch until 10 seconds after switching off the motor, will automatically be recorded by said electronic device and used for scoring.
Flight time will be recorded from launch (when model leaves hand of starter, but not before the start of the 10 minute window) to landing (when model touches the ground or any other object or at the end of the 10 minute window), each second yielding one point (600 max in theory).
The landing must not be outside of the 10 minute window (or it will not be scored, overflying more than 1 minute results in a zero score for that flight), and will score 50 points if within one meter of the designed landing spot, 45 within 2m and so on.
The altitude recorded is used to determine the "height penalty" : 0.5pt per meter is taken from the score for each meter up to 200m, 3 points per meter are subtracted for each meter above 200m. A perfect flight from a 200 m starting height would thus yield 600+50-(.5*200)= 550 points. If you go for 100m starting height, you could get 600 points.A 300 m starting height would only score 600+50- (.5*200+3*100) = 250
The aim is to use minimum launch height needed to achieve the 10 minutes, and this is a matter of fine judgement since there is only one motor run. It sounds really simple yes it is, but at the same time, its also quite challenging with different strategies for different kind of conditions. Give it a try when you go out to the field next time.
F5J is a class of thermal soaring that is getting very popular, as its a very simple format and allows gliders of all types and class to participate, no need for high powered and expensive motors/escs.
Goal :
-Last 10 mins in the sky with one motor run. (15mins in finals)
-Spot landing
There is a 10 minute window for a flight. Within that window you are allowed 1 continuous motor run that must not be longer than 30 seconds (a electronic device will cut the power at 30 seconds if the pilot has not already done so). The maximum altitude the model reaches, during the period from launch until 10 seconds after switching off the motor, will automatically be recorded by said electronic device and used for scoring.
Flight time will be recorded from launch (when model leaves hand of starter, but not before the start of the 10 minute window) to landing (when model touches the ground or any other object or at the end of the 10 minute window), each second yielding one point (600 max in theory).
The landing must not be outside of the 10 minute window (or it will not be scored, overflying more than 1 minute results in a zero score for that flight), and will score 50 points if within one meter of the designed landing spot, 45 within 2m and so on.
The altitude recorded is used to determine the "height penalty" : 0.5pt per meter is taken from the score for each meter up to 200m, 3 points per meter are subtracted for each meter above 200m. A perfect flight from a 200 m starting height would thus yield 600+50-(.5*200)= 550 points. If you go for 100m starting height, you could get 600 points.A 300 m starting height would only score 600+50- (.5*200+3*100) = 250
The aim is to use minimum launch height needed to achieve the 10 minutes, and this is a matter of fine judgement since there is only one motor run. It sounds really simple yes it is, but at the same time, its also quite challenging with different strategies for different kind of conditions. Give it a try when you go out to the field next time.
. Yeah, when you catch a big one, you be hooked for more. I remember my first feel of thermal was with my first e glider , the easystar during the marina south days, it just went up higher n higher without power.
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