Pal Joey (oz4719)

About this Plan

Pal Joey. Sport model for rudder-only radio control with .75 to 1.5 engine.

Quote: "EXPRESSLY designed for such engines as the Cox Medallion .049, Pal Joey is a rugged, rather docile and easy-to-fly sports model. Weighing 21 ounces with a relayless transistorised receiver (3 volt Kraft in picture), Pal Joey has 290 sq in a wing area for an approximate wing loading of 10-1/2 oz/sq ft and a power loading of about 430 oz per cu in.

Pal Joey is not, and is not meant to be a contest type machine. It does not have the requisite ballooning tendencies for so called stunts - the bane of all beginners and sport fliers in wind. The experienced flier can modify the set-up as he sees fit. Rudder control is enough to ensure turn capability when gliding straight downwind in a 10 mph breeze.

Considerable down and side thrust is used. With generous lift, downthrust is essential - in this case - to handle trim difference between power off and on airspeeds, and for into wind flight. Side thrust is usually exaggerated with shoulder wings having a high thrust line. There is not much decalage; but anyway, the model is stable. Trimming out a tail heavy condition by shimming the wing (tail being fixed) is nor recommended in this instance - better to add weight to the nose.

Rudder movement, hence power, requires strict adherence to Elmic escapement instructions - and depends on CG position, weight, etc. Supply for the 3V receiver - common voltage for radio and actuator - is a DEAC 225-mah 3-cell pack, yielding 3.6 volts - more probably after charging. Some brands of receivers won't oscillate in every instance, or become obstinately erratic, at more than 3-and-a-fraction volts specified, so follow manufacturers' directions..."

Supplementary file notes

Article, thanks to brokenenglish.

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