Gliders and powered model aircrafts
Powered model aircrafts
The basic elements of a model airplane
All model airplanes are equipped with the same elements, such as fuselage, wings, stabilizers and control surfaces. Due to many different demands on the type of construction there is a variety of model types with different flight performance and characteristics. Last but not least the elaborate technology of radio-controlled equipment contributes to this variety making it possible for the model aircraft to perform in exactly the same way as the full size.
How do gliders and powerd aircraft work ?
Every aircraft including the model aircraft has to obey the laws of aerodynamics.
Gliders use rising air to supply the necessary lift force, while a powered aircraft relies on an electric or combustion engine. The running engine draws the model forward by means of the thrust generated by the propeller.
Due to the forward motion of the aircraft air streams along the upper and lower side of the wing producing lift. Having reached a certain speed the lift becomes greater thand the model's weight. The model aircraft lifts off and flies, while the tailplane stabilizes the direction of flight. A rudder movement has an effect on the vertical axis (yaw); the model flies a curve. An aileron deflection creates a movement around the longitudinal axis (roll) rolling the model. A change in elevator creates a movement in the lateral axis (pitch); the plane ascends or descends.
Various forms of propulsion for model aircraft
Electric motors as well as combustion engines are suitable to power gliders, motor gliders or powered models. The type of electric propulsion captivates through its ease of handling.
Modern electric motors with efficient batteries, as well as combustion engines (there are two-stroke and four-stroke engines available) can be installed in all types of model aircraft.
The power required depends on the type of model you choose.
Different types of model gliders
The total wing loading on thermal gliders is kept to a minimum. With a lightweight and relatively slow flying glider even the slightest thermal lift can be used.
Gliders with 'all round' performance are very popular. With their efficient airfoils and new construction materials they can be flown at the slope in medium wind force as well as from a flat filed searching for thermal lifts.
Agile slope soarers can be flown in strong winds and are usually equipped with ailerons for aerobatic flight.
Different types of powered aircraft
Shoulder and high-wing planes tend to have a high level of inherent stability, which means that after an incorrect command from the pilot, the model will recover to straight and level flight on its own. These models are preferred by beginners to learn to fly and are used as trainer models.
Low wing, mid wing planes and biplanes are generally used for aerobatic flying demanding control from an experienced and skilled pilot. These models, controlled around all three axes allow any type of aerobatic figure in flight.
Criteria for selecting your model
First ask yourself the following questions:
- Do you prefer an all wood construction or would you prefer a highly prefabricated model because of lack of available building time?
- Does the selected model have the flight characteristics, speed and number of functions to match your piloting skills? - Do you want to fly the model every-where must it be capable of being hand launched?
- Do you have a runway or grass strip at your disposal?