FAI Free Flight Model Classes

No physical connection what so ever between the model and the competitor.

Table extracted from Fédération Aéronautique Internationale Sporting Code Section IV, Volume F1, Effective February 10, 2002.

Classes F1C and F1E permit the use of radio control "..only for irreversable action to restrict the flight.." which is dethermalization (both( and motor stop (F1C only, obviously).

Data represents gross specifications only. I urge you to download the current specification from the FAI Web Site and read all the convoluted fine-print!

Code Class	General Type	Brief Description
F1A	Gliders (A2 'Nordic')	Surface area: 32 - 34 dm2 Minimum weight: 410 g Max length of launching cable: 50 m at 5kg load with minimum cable pennant area of 2.5 dm2 World Championship Class
F1B	Model Aircraft with Extensible Motor (Wakefield)	Surface area: 17 - 19 dm2 Minimum weight less motor : 200 Max weight of the motor: 30 g World Championship Class
F1C	Model Aircraft with Piston Motors	Maximum swept volume of motor(s): 2.5 cm3 Minimum total weight: 300 g/cm3 Minimum loading: 20 g/dm2 Maximum loading: 50 g/dm2 Maximum motor run: 5 seconds World Championship Class
F1D	Indoor Model Aircraft	Maximum Wing Span: 550 mm Maximum Tail Span: 450 mm Maximum chord of all lifting surfaces: 200 mm Minimum weight without rubber: 1.2 gram Maximum weight of lubricated rubber motor: 0.6 g Ceiling heights categories Category I: less than 8 metres Category II: between 8 and 15 metres Category III: between 15 and 30 metres Category IV: higher than 30 metres World Championship Class
F1E	Gliders with Automatic Steering	Maximum surface area: 150 dm2 Maximum loading:100 g/dm2 Maximum flying weight: 5 kg
F1G	Model Aircraft with Extensible Motors (Coupe D'Hiver)	Minimum total weight less motor: 70 grams Maximum motor weight: 10 grams Mini-Event Class
F1H	Gliders (A1)	Maximum surface area: 18 dm2 Minimum weight: 220 g Max length of launching cable: 50 m at 2kg load with minimum pennant area of 2.5 dm2 Mini-Event Class
F1J	Power Model Aircraft (1/2A class power models)	Maximum swept volume of motor(s): 1.0 cm3 Maximum motor run: 7 seconds Minimum weight total: 160 g Mini-Event Class
F1K	Model Aircraft with CO2 Engines	Minimum weight without CO2: 75 g Maximum surface area: 12 dm2 Maximum volume of CO2 tank(s): 3 cm3
F1L	Indoor EZB Model Aircraft	Maximum projected wingspan: 458 mm (18.0 inches) Maximum wing chord: 76 mm (3.0 inches) Maximum stabilizer area: 50% of wing area
F1M	Indoor Beginners' Class	Maximum wing span: 460 mm Minimum weight: 3 g Maximum motor weight: 1.5 g
F1N	Indoor Handlaunch Glider	Folding wings not permitted

Code Class

General Type

Brief Description

F1A

Gliders
(A2 'Nordic')

  Surface area: 32 - 34 dm2
  Minimum weight: 410 g
  Max length of launching cable: 50 m at 5kg load
  with minimum cable pennant area of 2.5 dm2
  World Championship Class

F1B

Model Aircraft with Extensible Motor
(Wakefield)

  Surface area: 17 - 19 dm2
  Minimum weight less motor : 200
  Max weight of the motor: 30 g 
  World Championship Class

F1C

Model Aircraft with Piston Motors

  Maximum swept volume of motor(s): 2.5 cm3
  Minimum total weight: 300 g/cm3
  Minimum loading: 20 g/dm2
  Maximum loading: 50 g/dm2
  Maximum motor run: 5 seconds
  World Championship Class

F1D

Indoor Model Aircraft

  Maximum Wing Span: 550 mm
  Maximum Tail Span: 450 mm
  Maximum chord of all lifting surfaces: 200 mm
  Minimum weight without rubber:  1.2 gram
  Maximum weight of lubricated rubber motor: 0.6 g
  Ceiling heights categories
    Category I:   less than 8 metres
    Category II:  between 8 and 15 metres
    Category III: between 15 and 30 metres
    Category IV:  higher than 30 metres
  World Championship Class

F1E

Gliders with Automatic Steering

  Maximum surface area: 150 dm2
  Maximum loading:100 g/dm2
  Maximum flying weight: 5 kg

F1G

Model Aircraft with Extensible Motors
(Coupe D'Hiver)

  Minimum total weight less motor: 70 grams
  Maximum motor weight: 10 grams
  Mini-Event Class

F1H

Gliders
(A1)

  Maximum surface area: 18 dm2
  Minimum weight: 220 g
  Max length of launching cable: 50 m at 2kg load
  with minimum pennant area of 2.5 dm2
  Mini-Event Class

F1J

Power Model Aircraft
(1/2A class power models)

  Maximum swept volume of motor(s): 1.0 cm3
  Maximum motor run: 7 seconds
  Minimum weight total: 160 g
  Mini-Event Class

F1K

Model Aircraft with CO2 Engines

  Minimum weight without CO2: 75 g
  Maximum surface area: 12 dm2
  Maximum volume of CO2 tank(s): 3 cm3

F1L

Indoor EZB Model Aircraft

 
  Maximum projected wingspan: 458 mm (18.0 inches)
  Maximum wing chord: 76 mm (3.0 inches)
  Maximum stabilizer area: 50% of wing area

F1M

Indoor Beginners' Class

 
  Maximum wing span: 460 mm
  Minimum weight: 3 g
  Maximum motor weight: 1.5 g

F1N

Indoor Handlaunch Glider

 
  Folding wings not permitted

Once upon a time there was a F1F category for rotary wing free flight models, but it does not appear in Section IV, Volume F1 for 2002. Guess it has died...

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