ORIGINAL: JohnBuckner
As always when you are talking a technical field, language becomes very fluid and is constantly changing. In the full scale world I believe the word spoilers was used in connection to systems such as the P-61 as well a virtually ever glider/sailplane still to this day but all of these typically were never mixed ailerons and spoilers. The were normally separate surfaces positioned near mid cord and they killed lift to provide increased rate of descent or used differentially to provide roll control. The P-61 not only had these for primary roll control but also small conventional ailerons to provide primarily some tactile pilot feedback on the controls, something pure differential spoilers were/are poor at.
Spoilerons is something that I cannot think of a single application in the full scale world but its early this morning
and the pure use of mixed spoilers is OK but even the spoiler function is poor when used in this manner as there is excessive pitching when applied. This is something pure spoilers mounted near mid cord do not do. Those are a joy to use both in full scale and RC true spoilers do not effect any pitching at all.
John
Doesn't the Mitsubishi MU-2 "Rice Rocket" doesn't have normal ailerons - it uses full span faps and spoilerons for roll control?
As far as using flapperons, if it's a flat bottom airfoil on a trainer, I've used them will good success if the ailerons are dropped about 1/4". I've found they do help the overall flying characteristics of the trainers I've tested, but are not down enough to create a tip stall or induce a spin (I've intentionally tried to spin a couldn't induce anything more than a big spiral). They did make a slight difference in the stall characteristics (more benign), slowed the approach speed slightly and did decrease the landing roll by about 30' or so. Overall I thought the made the trainers more forgiving with slightly less speed but also need to be adjusted for each individual plane to find what is optimal. Spoilers and airbrakes are a different story and can get one into trouble really quickly. Graupner airbrakes could be a much better alternative to spiolers but they have to be built into the wing when the wing is being fabricated.
Hogflyer