Details of the Scale Technical Committee can be found here.
Perhaps the most realistic form of aeromodeling, in its main purpose to replicate full-scale aircraft designs from aviation history, for testing of future aviation designs, or even to realize never-built "proposed" aircraft, is that of radio control scale aeromodeling, as the most practical way to re-create "vintage" full-scale aircraft designs for flight once more, from long ago. RC Scale model aircraft can be of any type of steerable airship lighter-than-air (LTA) aviation craft, or more normally, of the heavier-than-air fixed wing glider/sailplane, fixed-wing single or multi-engine aircraft, or rotary-wing aircraft such as autogyros or helicopters.
Full-scale aircraft designs from every era of aviation, from the "Pioneer Era" and World War I's start, through to the 21st century, have been modelled as radio control scale model aircraft. Builders of RC Scale aircraft can enjoy the challenge of creating a controllable, miniature aircraft that merely "looks" like the full scale original in the air with no "fine details", such as a detailed cockpit, or seriously replicate many operable features of a selected full scale aircraft design, even down to having operable cable-connected flight control surfaces, illuminated navigation lighting on the aircraft's exterior, realistically retracting landing gear, etc. if the full-sized aircraft possessed such features as part of its design.
Various scale sizes of RC scale aircraft have been built in the decades since modern digital-proportional, miniaturized RC gear came on the market in the 1960s, and everything from indoor-flyable electric powered RC Scale models, to "giant scale" RC Scale models, in scale size ranges that usually run from 20% to 25%, and upwards to 30 to 50% size of some smaller full scale aircraft designs, that can replicate some of the actual flight characteristics of the full scale aircraft they are based on, have been enjoyed, and continue to be built and flown, in competition and for personal pleasure, as part of the RC scale aeromodeling sport.
Scale Control Line
Scale Control Line is an event where an accurate scale model of a real aircraft is flown. Scoring is based on static judging of how closely the aircraft resembles the full-size prototype and on the flight performance. Extra points are often awarded for "working" features of the model, such as a retractable landing gear, droppable bombs, and other prototypical functions or operations. The number of features used to be limited by the number of lines that could be practically used to mechanically control them. Some complex scale models use a fly-by-wire approach to allow a multitude of extra working features. A radio-control transmitter's encoder unit can be adapted, with no RF signal board present, to send its control signals along insulated control lines, instead of broadcasting them using radio frequencies. If signals are sent down the lines, the normal serial multiplexing of the control signals by such an adapted RC transmitter's encoder unit, solely sending those signals along the usual duo or trio of control lines, gets picked up by decoding gear in the model - usually adapted from an RC receiver, without an RF "front end" section - and permits many functions to be controlled without the use of additional lines. Standard servos can then be used in the model. From 2013, in the USA, the radio control "over the airwaves" of any moveable feature of control-line Scale or Carrier models (except the elevator) is permitted - this may spread to Europe and beyond in time.
Scale models replicate full-scale aircraft. Scale documentation is used at contests to check the accuracy and compliance of the model to the full-scale aircraft modelled.
There are a number of power sources for Scale Free flight models, such as Rubber, CO2, Electric and Internal Combustion.
Most rubber scale models are in the 20” to 30” wingspan range. Exceptions are for "Peanut Scale" class models, with a maximum 13” wingspan and "Jumbo Scale" class models, with 36” or greater wingspan. The models are powered with loops of rubber matched to the weight of the model and the diameter and pitch of the propeller. The length of the loops often exceed twice the length of the fuselage of the model. The flying duration of the scale model is greatly increased because of the number of windings that can be made on such a long loop of rubber with multiple strands. A mechanical winder is used and the rubber is stretched up to fives times original length to pack in maximum winds on the motor. In flight, these models look just like the real thing. All that is missing is the noise of the engine in the original airplane. Experts can achieve spectacular flights from obscure designs such as the Wright brothers original and Bleriot’s channel crosser, to one-of-a-kind Depression era homebuilt and modern day experimental aircraft.