FUTABA 12K Instruction Manual page 163

WINGLET
This function adjusts the left and right rudder
angles of airplanes with winglets.
Winglets are used to improve the efficiency of
aircraft by lowering the lift-induced drag caused by
wingtip vortices. The winglet is a vertical or angled
extension located at the tip of each wing.
Winglets work by increasing the effective aspect
ratio wing without adding greatly to the structural
stress and hence necessary weight of its structure
- an extension of wing span would also permit
lowering of induced drag, though it would cause
parasitic drag and would require boosting the
strength of the wing and hence its weight. There
would come a point at which no overall useful
gains would be made. A winglet helps to solve this
by effectively increasing the aspect ratio without
adding to the span of the wing.
and access the setup screen shown
below by pushing the RTN button.
and return to the Model
menu by pushing the RTN
button or pushing the
HOME/EXIT button.
RETURN
Setting method
Move the cursor to the item you want to
the data input mode.
*When the RTN button is pushed for one second, the rate is
reset to the initial value.)
mode.
*If the mixing direction is reversed, change the mixing rate
polarity (+ or -).
RUDDER 1
Winglet
( )
at Flying wing
<Model Menu (Airplane/Glider Functions)>
RUDDER 2
Winglet
( )
at Flying wing
<Push Dial>
163