Era Model Service
Quality Plan Sets for Radio Control Aircraft
Carl Goldberg's 1938 Comet Clipper
The fuselage support trestles. Spruce sticks are to be glued even
with the edges that rest against the fuselage, seen in the next photo.
Use the dashed marks on the plan to place the
trestles. The fuselage sides should rest on all three threstles,
although mine were about
1/32 above the front support. Perhaps my building board is not perfectly flat?
Clothes pins were used to clip the fuselage sides in
place checking that the front of the fuselage sides were in alignment
with the front trestle.
The wing mount
plates were installed on
the fuselage sides before they were put on the trestles. Be sure
and make a left and a right. The
clipped on in the middle of the sides on the middle trestle insure the fore and aft alignment stays accurate. I neglected to take a
photo, but rubber bands were used across the extended front longerons to hold them inward against the upper and lower crossmembers while
they were being fitted and glued in place. The carpenter's square is being used to check for vertical fuselage sides as crossmembers are
The first two are being installed in this photo, it's better to
put the first crossmembers in where the fuselage is largest, and work
front end first. If necessary install temporary diagonals to keep the fuselage square while framing up the fuselage.
Remove them later
After the front crossmembers behind the firewall were installed, the
1/16 ply former was installed using 5 minute epoxy. This part
is a holdover
from the free flight design, but is a convenient way to accurately align the firewall with the fuselage. The original was
this way so the entire firewall and the attached platform that held the coil and batteries could be pulled out the front.
Note the temporary diagonal behind the plywood plate.
Putting in the bottom crossmembers and diagonals takes some care to keep
them flush with the bottom of the fuselage. A balsa stick
was held under
the fuselage where it was high enough off of the building board to
allow that, and the parts were pressed down to
rest on it.
A rubber band holding the fuselage sides together in a few places
helps so the sticks stay put for gluing.
Some views of
the fuselage bare framing. Carl G. still has in mind a lot more
A permanent internal diagonal was installed at the back of the wing saddle. Stresses get high there in less than perfect landings. The front diagonal will
be removed, the battery will slide through there.
II Building Photos and Notes
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