Pazmany PL-4 (oz13503)

About this Plan

Pazmany PL-4. Control line scale model.

Quote: "Control Line scale model of the well known Experimental Aircraft Association light plane. Pretty little thing, designed for .049 power, really goes. Pazmany PL-4, by Bill Blake.

Our model is 1/10 scale and designed right off the 1/10 scale drawing for the real bird. It may seem a little large for the .049 engine, but that is what makes it fly so realistically. For a little more zip, anything up to and including an .09 could be used. Construction is basically pretty simple with a solid balsa wing and stabilator and a built-up sheet fuselage, fin/rudder assembly.

First cut the fuselage sides to shape getting a nice level cut where the wing fits in. Mark the locations of all the bulkheads on each side piece. Glue F-4 in place and when that is dry glue in F-3. Next comes the plywood fire wall and then F-2. When all are good and dry, pull the fuselage together at the tail end and install F-6, pinning in place until the glue sets. Now add F-2 and F-5. Cut the fin spar to shape and glue to F-6. Cut the turtledeck top to shape and glue to F-4 and F-6. Cut a hole in the top to admit the vertical push rod. Next the fin ribs F-1 and F-2 are cut to shape and glued in position. Now set the fuselage aside for a while.

Cut the stabilator to shape with the slot for the dowel. Cut the control horn from plywood, drill a 1/16 hole for the push rod and a 1/8 hole for the dowel. Mark the exact center of the dowel and glue the horn in place. Cut the two bushings from 1/8 aluminum tube and slip over the dowel, sanding the dowel as required to let the dowel rotate freely. Now glue the dowel in place in the stabilator with horn level with the stab. Do not get glue on the bushings.

Back to the fuselage. Install the bellcrank mount and bend both push rods to shape. Cut the 1/2A bellcrank to the shape shown and the pivot wire to a length where the ends are flush with the outside of the fuselage sides. Insert the end of the push rod through the slot in F-4; put the bellcrank on and then the rear bellcrank (remember the bottom of the fuselage is still open). Place the rear bellcrank in position..."

Pazmany, MAN, August 1975.

Direct submission to Outerzone.

Supplementary file notes

Article pages, thanks to RFJ.

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