High Quality Plan Sets for Radio Control Aircraft
Henry Struck's 1937 Benny Boxcar
Scaled to 108 inch span
Page 10
Bevel the lower side of the upper spar at the tip as shown.
Assembly of the left outer wing panel. The root end of the spars rest against a square and the .402 blocks are beneath the lower spar. All the ribs are installed as well as the balsa tip spar.
The leading and trailing edges are installed. Do not join the tip parts flat on the plan, that will void the warranty. Next the tip parts are installed, starting with the front section, then the aft section, and finally the
middle section. The ribs will align the front section and the aft section, and the top spar and the end of the front and back sections will align the middle section. Don't worry, a little sanding will fix it all up just fine.
Assembly of the outer wing panel joiners. The joiner blocks are inserted between the spars with paper on top to give a little extra clearance. The spar ends
are tack glued to the ribs with the spars held against the joiner blocks. The 5/32 brass tubing and the 1/8 music wire are in place to insure wing alignment.
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