High Quality Plan Sets and Laser Cut Partial Kits for Radio Control
Aircraft
Page 9
Carl Goldberg's 1938 Comet Clipper
The
3/16 foamboard base for outer wing panel construction.
The extra outboard wing
plan on sheet 3 has been cut out and taped to the plan. It helps to
cut the plan in a zig-zag pattern where it mates to the base plan so there
are more places to
check the line up. The platform is then slid under after the plan is
taped together. You will be better off to remove the inner wing
panel from the plan to do this. Leave the spar fence
attached to the spars, just unpin it from the plan. It will be used
to align the ends of the leading and trailing edges.
A straightedge is
useful to get the platform in the correct position. The
straightedge needs a good sharp corner for accurate placement. The
corner should be right on the centerline of rib #11.
Slide the platform in or out until the ruler lines up and is just
touching the plan at the centerline. When one edge is correct pin
it to the building board and do the other edge, then go back and
recheck both edges.
Rechecking
the base alignment once the inner wing panel is back on the
plan.
The
#17
rib is pinned to the plan at both ends to keep the parts in line.
The ribs are glued here, but that is only because the photo was
taken out of order. Mate the spars to the inner wing before gluing
any ribs.
The
spars glued and clamped, and then all the ribs are aligned and
glued.
The
spar
fences have been removed and the second wing panel has been built.
The upper spar center reinforcement sub-spars are shown here.
These
are blocks
to hold rib #11 at the proper height when joining the wing halves.
Balsa was used so pins could be stuck in them. These are 2
1/2 inches in height and were used with the feet removed from the #11
ribs. It may be more precise to leave the feet on, if so the
blocks should be 2.024" in height as shown on the plan. Dimensions
are also shown for the blocking when the
wing join is made with one wing panel flat on the plan.
A block under the left
wing panel. The block is pinned to the plan and the rib is
pinned to the block.
The block under the right
wing panel. The rib is pinned to the block, but the block is not
pinned, but is free to move on the plan. This is to allow fitting
of the spars at the center join.
Although the leading and trailing edge assembly is started here,
when the blocking is first installed on the right wing panel these parts
are absent. Photo taken out of order.
Installing
the
upper spar doublers. Note that the leading edge parts on the left
wing panel are installed with the front sheet extending past the
centerline. Also note that the leading and trailing edges
are not yet installed on the right wing panel. The right wing
panel is bought up to the left and adjustments are made to the spars so
they all meet at the centerline. During this process
check that the spars are aligned over the plans properly.
