Banker - Radio control model for single channel with ailerons only, for 1.5cc power.
Quote: "The urge to progress, to improve on one's flying ability and to try out new developments, led to the building of this model, as a determined effort to get out of the rut. Aileron-only control seems to be used a great deal in Japan, so I thought there must be something in it. Now I would not revert to rudder - unless it was to try kick-up elevator again.
You see, the Banker was originally fitted with kick-up elevator and this proved only partially successful in that, although it would loop and half-roll off the top, it had a nasty habit of pointing its nose up at about 60 degrees every right-hand signal. The Elmic Compact escapement rotates through the up-elevator position after each left signal and the elevator, therefore, kicks-up just before right-aileron, causing this to happen. I have since removed the elevator function and Banker flies very smoothly indeed. Spiral dives are fairly wide, and the model will loop and roll, etc., using normal rudder flying techniques.
A low-wing configuration was considered to be a little dodgy for a first try at aileron-only, hence the somewhat stereotyped general layout. Construction was kept simple and the fuselage is wide enough to take most receivers. The wing features a full-depth sheet spar, and wide leading-edge sheeting. The engine used on the original is the O.S. Max 10, which gives ample power. Radio gear is a MacGregor Minimac receiver, Elmic Compact escapement, coupled with Fred Rising clockwork actuator for motor speed control.
If the model is to be used without the motor-control or the 225 DEACS shown. it would be advisable to lengthen the nose by about 3/4in to keep the centre of gravity in the correct place without ballasting.
Construction: When choosing your balsa, select the correct grade of wood for each part..."
Banker, Radio Modeller, September 1967.
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