Era Model Service
Quality Plan Sets for Radio Control Aircraft
Carl Goldberg's 1938 Comet Clipper
As in construction of the fin, the elevator spars are attached to the
stabilizer rear spar by spot gluing 1/32 balsa in between.
The perimeter parts were first assembled over
the plan with the 1/4 inch parts flat on the plan and the 3/16 parts
shimmed up 1/32".
.277 shims were placed under the 3/16 parts, .246 shims under the 1/4
inch leading edge parts, a 3/16 shim under the center of the stabilizer
spar in the
area relieved for the 1/16 lower sheeting, and finally a .146 shim
under the center of the stabilizer front spar. These shims are
next to the fin
shims on the 1/4 inch balsa
laser cut sheet. The two spars were then attached to the
perimeter. It might be well to shim up under the front spar with
whatever fits at some points along the taper when adding the ribs. There are two in this photo.
upper 1/16 X 1/4 ribs are installed. Try to use balsa of the same
stiffness throughout so the stabilizers and elevators keep a
The top center balsa sheeting is installed next.
The lower ribs are next installed, and the elevator ends, from scrap 1/8 balsa.
fin has been fit to the stabilizer top sheet. The fin was laid
sideways across the stabilizer, with the aft side of the fin front spar
even with the
face of the
stabilizer main spar. An Exacto knive was used to lightly score the
cut lines, being careful not to bend the fin's aft spar
those scores. After that,
calipers were used to measure from the sides, taking dimensions from the plans. The side cuts were made
with the knife, and then the cross cuts
fin spars were then boxed in with scrap 1/8 balsa, being careful to not
get glue on the spars, then the fin was removed and final gluing was
The boxes are sanded down to fair with the bottom sheeting's eventual place.
II Building Photos and Notes
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