High Quality Plan Sets and Laser Cut Partial Kits for Radio Control
Aircraft
Page 8
Henry Struck's 1937 Benny Boxcar in 108 inch span
Rudder fit.
All of the 5/8 X 3/16 spar stock has been
cut to length and the ends have been shaped as shown on the plans.
This photo shows the upper spar reinforcemnents being glued
to the upper spars. Take care to align the inner ends of these
components properly.
This photo shows the outer ends of the
outer wing panel lower spars. The slice in the ends is to allow them to
conform to the curve of the balsa end spar parts.
Balsa blocks support the lower spar at the
proper height. The blocks are .402 inches high, as shown on the
lower right corner of
sheet one of the plans. The five
center ribs are not installed until the
center wing sections are joined. 1/16 soft balsa was glued to 3/8
stock to make the blocks, followed by sanding to the proper dimension.
The dihedral jig is used to align the
inner end of the spars. The other end of the spars should rest
against a right angle square if the spars are properly dimensioned.
