F5b
Encyclopedia
F5b is a type of remote control electric model aircraft
contest that consists of doing as many laps as possible between 2 poles 150 meters apart in 200 seconds followed by 10 minutes of thermalling, and then landing on a 30 meter landing circle. The laps must be made while gliding only, no motor allowed, so the motor is used to rapidly climb and power into the course. There is a limit of 10 climbs, so to get more than 20 laps (a complete circuit- to the far pole & back- is 2 laps) the plane must climb high and glide 4 laps. To score more than 40 laps, the plane must glide a combination of 4 laps sets and 6 lap sets.
A typical F5b aircraft is commonly referred to as a hotliner
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For more information on the rules, one may refer to Fédération Aéronautique Internationale
(FAI) Sporting Code Volume F5 Radio Control - Electric Powered pg. 12 http://www.fai.org/aeromodelling/system/files/sc4_vol_f5_electric_11.pdf
Model aircraft
Model aircraft are flying or non-flying models of existing or imaginary aircraft using a variety of materials including plastic, diecast metal, polystyrene, balsa wood, foam and fibreglass...
contest that consists of doing as many laps as possible between 2 poles 150 meters apart in 200 seconds followed by 10 minutes of thermalling, and then landing on a 30 meter landing circle. The laps must be made while gliding only, no motor allowed, so the motor is used to rapidly climb and power into the course. There is a limit of 10 climbs, so to get more than 20 laps (a complete circuit- to the far pole & back- is 2 laps) the plane must climb high and glide 4 laps. To score more than 40 laps, the plane must glide a combination of 4 laps sets and 6 lap sets.
A typical F5b aircraft is commonly referred to as a hotliner
Hotliner
In radio-controlled aircraft, Hotliner is a term used to describe a fast sailplane with an electric motor. The range of what is often described as a hotliner varies from a sailplane with ailerons to 7000 watt competition F5b planes...
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For more information on the rules, one may refer to Fédération Aéronautique Internationale
Fédération Aéronautique Internationale
The Fédération Aéronautique Internationale is the world governing body for air sports and aeronautics and astronautics world records. Its head office is in Lausanne, Switzerland. This includes man-carrying aerospace vehicles from balloons to spacecraft, and unmanned aerial vehicles...
(FAI) Sporting Code Volume F5 Radio Control - Electric Powered pg. 12 http://www.fai.org/aeromodelling/system/files/sc4_vol_f5_electric_11.pdf