High Quality Plan Sets for Radio Control Aircraft
Henry Struck's 1937 Benny Boxcar
Scaled to 108 inch span
Page 9
The outer ends of the center section main spars aligned with a square.
Initial assembly of the ribs and spars on the left center wing panel.
Sub spars are installed and the trailing edges are being prepared. The inboard edges of the subspars, trailing edge and leading edge should be left long and will be cut to proper length when
the center panels are joined. The diamond file shown is exactly the right width to cut the notches for the ribs. An initial cut is made with a razor saw to make sure the location is accurate.
The leading edges and trailing edges are installed. The trailing edges were first cut to rough cross section with a band saw and then filed to shape. They should be installed flush with the
bottom of the ribs and 1/16 above the top of the ribs to allow for matching to 1/16 capstrips. The trailing edge rests on the plan at the aft edge and fairs to the lower curve of the ribs.
Construction of the outer wing panel joiners. Spar stock and the ply shear webs are glued in halves while clamped to an aluminum angle.
The completed joiner parts. The halves shown before have been assembled while clamped in the angle.
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