Aeronca Champion. Radio control scale model.
Quote: "Fully aerobatic scale model for 4 function proportional radio control and 5.8 - 7.4 cc (.35 - .45) engines. OS Max H40P shown.
Let's start immediately without frills and get cracking with the fuselage. Join 3/32 in medium balsa sheet together to obtain the necessary width and cut the two sides, without the windows. White glue the 1/32 in ply doublers in place and leave overnight. Cut all ply formers and screw the brass tubing on F3A. Then, solder the joints. glue on wing mount WM2 to F5 and U/C block to F3.
Now mark cabin windows and cut through sides and doublers with a pointed balsa knife and sand window frames, mark F positions, glue in U/C1s. The problem of holding the sides curved round F2 is solved by nailing them in while the glue sets! Make sure they are dead square to F2 and then join together at the tail end, retaining with a paper clip. Fit in all the formers and leave to set.
Next job is planking the top and bottom of the nose, using soft 1 in balsa. Fit all the 3/16 in square stringers and cabin frames and the ply tailwheel mount. Before sanding the planking, brush glass fibre resin inside, all around F2 and F3, after which the fuselage can be finish sanded. It's a good idea at this point to matt black the cabin inside way back to F6, but don't fit the celluloid windows yet.
Wings. Cut all ribs first, using scrap bits of balsa where possible (they can be 1/8 or 3/32 in, soft or medium) and drill for the aileron pushrods in appropriate position. Spars are cut next, from 1/8 in firm balsa. If you wish to build a 'clipped' version as used in Air Shows, etc, cut the spars one or two ribs shorter from the centre, leaving the ailerons and strut fixing points as they were. The dihedral braces are cemented to the spars before building the wing..."
Aeronca Champion, RCM&E, September 1971.
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