Aileron-rudder mixing
The purpose of aileron-rudder mixing is to eliminate adverse yaw, i.e., an inherent opposite yaw or skid that occurs when the ailerons are deflected in flight. Adverse yaw is especially ronounced with flat-bottom wing airplanes. Aileron-rudder (A/R) mixing automatically coordinates the rudder with the aileron in the same direction to eliminate adverse yaw, thus providing a precise axial roll response when banking and correcting turns, adjusting course, performing aerobatics, etc..
Originally, 1st RC Flight School did not utilize A/R mixing at first because it wasn't the norm in RC at the time (even though full-scale aviation has widely applied the use of yaw damper (A/R mixing) since the 1950's). When we started mixing rudder and ailerons on our flat-bottom wing primary trainers, the students' weekly average number of landings leaped from 10-15, to 30-40, an increase of over 200%!
The reasons for the increase are simple: Whether the beginning RC flyer applies his or her inputs correctly or not, they always has honest results to learn from. The airplane's true representation of the control inputs made leads to an improved understanding of proper control and therefore his practice is more consistent and predictable. The improved control achieved with A/R mixing also allows effective training in winds that would ground all other trainers. See Reviews
Our school's primary purpose mandates taking advantage of all the tools available, including the use of A/R mixing, to ensure every student's ability to safely solo in all kinds of conditions in less than a week, knowing that they will then use that foundation and confidence to continue learning and advancing on their own. Furthermore, the amount of rudder mix required to produce coordinated turns is usually less than 50%, therefore, there's plenty of rudder authority available to the pilot if he wants to independently cross-control the rudder and aileron in a strong crosswind, assuming he has the skill. The point is that the aim of A/R mixing is to get new pilots soloed and flying symmetrical-wing planes that don't require aileron-rudder mixing, but in hours as compared to months or years!
Our school's primary purpose mandates taking advantage of all the tools available, including the use of A/R mixing, to ensure every student's ability to safely solo in all kinds of conditions in less than a week, knowing that they will then use that foundation and confidence to continue learning and advancing on their own. Furthermore, the amount of rudder mix required to produce coordinated turns is usually less than 50%, therefore, there's plenty of rudder authority available to the pilot if he wants to independently cross-control the rudder and aileron in a strong crosswind, assuming he has the skill. The point is that the aim of A/R mixing is to get new pilots soloed and flying symmetrical-wing planes that don't require aileron-rudder mixing, but in hours as compared to months or years!
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Center of Gravity rules of thumb explained
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