Indoor modelling class rules

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F1D

3.4. CLASS F1D - INDOOR MODEL AIRCRAFT

3.4.1. Definition
Model aircraft which can only be flown in an enclosed space and which are powered by extensible motors and in which lift is generated by aerodynamic forces acting on surfaces remaining fixed in flight, except for changes of camber or incidence.
3.4.2. Characteristics of Indoor Model Aircraft F1D
Maximum wingspan of the monoplane model................550 mm
Maximum chord of the lifting surfaces ..........................200 mm
Maximum tail span .......................................................450 mm,
Minimum weight without rubber motor ..........................1.4 g,
Maximum weight of the lubricated rubber motor ...........0.4 g.
The competitor must be the builder of the models entered.
The model shall carry the FAI unique ID number of the competitor on the motorstick written with permanent marker or other non-removable means.

F1L

3.L CLASS F1L - INDOOR EZB MODEL AIRCRAFT

3.L.1. Definition
Monoplane model aircraft powered by one (1) extensible motor, and in which lift is generated by aerodynamic forces acting on fixed surfaces.
3.L.2. Characteristics
Wingspan, maximum projected .....................................457.2 mm
Wing chord maximum ...................................................76.2 mm
Stabiliser area maximum ..............................................50% of wing
1. a) Structure
  1. 1) Only balsa wood and adhesive are to be used for the basic structure. Exempted are the propeller shaft, rear hook, thrust bearing, surface holding fittings and reinforcements for their attachments. No external bracing is allowed except balsa wood wing struts.
  2. 2) The motor stick must be a solid single piece of balsa. The tail boom must also be solid and of one piece but may be an extension of the motor stick. Balsa splices up to one centimetre in length may be used to repair breaks in the motor stick or boom.
  3. 3) The propeller must be all balsa except for ground adjustable pitch fittings, if used.
  4. 4) There are to be no devices for changing any part of the model's geometry or torque during flight. Only the normal flexing of the structure due to flight loads or motor forces is allowed.
2. b) Covering
  1. 1) Models are to be covered with any commercially available solid sheet material such as paper or plastic.
  2. 2) Microfilm is not allowed.
3. c) Weight
  Weight of the model without rubber motor shall not be less than 1.2 g.
4. d) The model shall carry the FAI unique ID number of the competitor on the motorstick written with permanent marker or other non-removable means.
The competitor must be the builder of the models entered.

F1M

3.M CLASS F1M – INDOOR BEGINNERS CLASS

3.M.1. Definition
As 3.4.1 plus:
3.M.2. Characteristics of Indoor Model Aircraft
The wing span of the model shall not exceed 460 mm, monoplanes only permitted. The minimum weight of the airframe is 3g. The maximum weight of the rubber motor shall not exceed 1.5g. The covering of the model may consist of any material except microfilm.
The model shall carry the FAI unique ID number of the competitor on the motorstick written with permanent marker or other non-removable means.
The competitor must be the builder of the models entered.

F1R

3.R CLASS F1R – INDOOR MODEL AIRCRAFT “MICRO 35”

3.R.1. Definition
Model aircraft which can only be flown in an enclosed space and which are powered by extensible motors and in which lift is generated by aerodynamic forces acting on surfaces remaining fixed in flight, except for changes of camber or incidence.
3.R.2. Characteristics of Indoor Model Aircraft
Maximum wing span of the monoplane model: 350 mm.
The model shall carry the FAI unique ID number of the competitor on the motorstick written with permanent marker or other non-removable means.
The competitor must be the builder of the models entered.

F4F

CLASS F4F - FREE FLIGHT PEANUT SCALE AEROPLANES (PROVISIONAL)

General Rules

Only the following rules from 6.1 will apply: a) 6.1.7. Number of models
b) 6.1.9.2. Name of entry

Definition of Peanut Formula Scale Models

A Peanut Formula scale model aircraft shall be a reproduction of a heavier-than-air man carrying aircraft.

General Characteristics:
Maximum dimensions:
33 cm span or
23 cm overall length excluding the propeller. Motive power: Extensible motor(s) only.

Documentation

The minimum documentation is to be one of the following:

a) A general arrangement drawing of at least two inches (5 cm) wingspan, plus one photograph or printed reproduction of the prototype. If the photograph or printed reproduction is not in colour, then an authentic written colour description must be included; or
b) a coloured three-view ( eg “Profile” publication) to a minimum of 1/144 scale. The competitor must also state in the documentation, the type of covering material used.

Flying Section

Each competitor is allowed up to 9 official flights. An official flight is counted each time the model aircraft is released for a declared flight. The times of the longest two flights (each rounded down to the nearest second) will be aggregated to form the competitor’s flight score. Flights may be hand launched or from take-off. If take-off is successfully achieved, without pushing or similar assistance, then 10 seconds will be added to that flight time recorded.

Appearance Score

Models will be judged visually, in comparison with the documentation provided, by one or more judges. No measurements will be taken.

No-cal

Solid motor stick and boom.

The model should be a recognisable model of a full sized aircraft, with a wingspan not exceeding 16 inches.

Minimum airframe weight without rubber 6.0 g

Balsa wood and jap-tissue shall be the main construction materials. The use of hi-tech materials such as boron, carbon fibre etc. is not permitted.

The model must have control surface outlines, window outline and registration markings as per the modelled full sized aircraft.

The model must have the full landing gear as per the full sized aircraft. No profile gear is allowed. Models of aircraft with retractable gear may be depicted with the gear retracted.

No mechanical means of varying the propeller pitch or wing incidence are permitted.

A-6

The model shall be rubber powered and covered with paper or commercially available plastic; no microfilm allowed.

The total maximum projected wing area shall be 30 square inches, 19350 mm2. The stabilizer area shall not exceed 50% of the wing area.

All wing, stabilizer and rudder wood including wing posts shall be 1/16” (or 1,5 mm) square wood minimum, except ribs shall be 1/32” X 1/16” (or 1,5 x 1.0 mm) minimum. Posts may be rounded in the area of the mounting tubes.

The motor stick shall be from solid wood of 6” maximum length measured from the front thrust bearing face to the front of the rear hook.

The propeller shall be 6” maximum diameter with flat blades from balsa no thinner than 1/32” ( or 1 mm)

The minimum weight of the model shall be 1.2 grams without rubber motor.

No special materials such as boron, carbon fiber or foam are to be used.