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diff-red (Differential reduction)
The problem of reduced aileron response in the butterfl y
confi guration has been mentioned earlier: if aileron diffe-
rential is employed, the aileron response on the landing
approach may be adversely affected through the extre-
me “up” defl ection of the ailerons, permitting virtually no
further up-movement; on the other hand the “down” tra-
vel has already been reduced by the programmed diffe-
rential setting. The overall result is signifi cantly reduced
aileron response compared to the normal setting of the
control surfaces.
In this case you really should use “differential reduction”
it at all possible. This reduces the degree of aileron dif-
ferential when you invoke the butterfl y setting using the
airbrake stick. Differential is reduced progressively, or
even eliminated altogether, as the airbrake stick is mo-
ved towards its end-point.
A value of 0% means that the full programmed aileron
differential is retained. A value of 100% means that the
aileron differential is completely eliminated at the maxi-
mum butterfl y setting, i.e. when the airbrakes and other
glide path control surfaces are fully extended. If you set
a value above 100%, the aileron differential is eliminated
even before full travel of the airbrake stick is reached.
Wing mixers – Fixed-wing model
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