Great Planes Spirit of St. Louis ARF - GPMA1151 - Manual (Page 6)

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1. Using the precut lines as a guide, use a sharp hobby
knife to cut the rudder from the fin and the elevator from
the stabilizer (stab).
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2. Sand a bevel to the bottom of the leading edge of the
elevator. The elevator is upside-down when the slot for the
control horn is on the left side.
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3. Lay the stab and elevator on your workbench with the
slot in the elevator on the right side. Be certain there is a
1/32” gap between the elevator and the stab. Use one piece
of cellophane tape on the top to join the elevator to the stab.
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4. Sand a bevel to one side of the rudder (it doesn’t
matter which side), then use cellophane tape to join the
rudder to the fin just the same as you joined the elevator to
the stab.
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5. Use a hobby knife to carefully widen the slot in the
rudder and the elevator for the 1/64” plywood control horns
(9). Only a small sliver of foam is to be removed.
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6. Enlarge the holes in the control horn for the pushrod
wire with a T-pin. Glue the control horns into the slots. Be
certain the elevator control horn is on the bottom and the
rudder control horn is on the left (the stab and elevator are
shown upside-down in the photo). Also be certain the
control horns are facing forward.
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7. Use epoxy to glue the fin to the stab. Use a small
builder’s square to get the fin perpendicular to the stab, then
use tape or small T-pins to hold them together until the
epoxy hardens.
Assemble the Tail Surfaces
ASSEMBLY
6