Great Planes Learjet 40 Kit - GPMA0439 - Manual (Page 27)

D 2 Sand the sides of the canopy base to an angle to
match the shape of C-1 and C-2 Tack glue the canopy
frame into the fuselage, then trim the canopy (starting
outside the cut lines) to fit When satisfied, remove the
canopy and frame from the fuselage, then glue the canopy
and frame together.
D 7 Position a straightedge between F-1 and the spinner,
then draw the angle of the cowl on the edge of each
mounting block Remove the spinner Sand the tops of the
blocks to the lines you drew Mark the centerline of each
block on a piece of tape wrapped around the fuse
D 3 Glue the die-cut plywood canopy hook inside of the
canopy frame at the notched location in C-2 Fit and glue
two 1/4" x 3" balsa sticks (cut from 6" piece) to the bottom
of the canopy frame to prevent the canopy from moving
sideways The canopy is held in position by a rubber band
(not included) looped around the cross piece on former
F-2 and then attached to the plywood hook.
D 8 Cut the opening at the front of the cowl and trim the
rear edge to along the "cut line " Cut out the engine access
hole on the side of the cowl following the cut lines Position
the cowl on the fuse and make adjustments to the engine
opening as required Sand the edges of the mounting
blocks if needed for a good fit.
D 4 After referring to the plan, glue the die-cut plywood
firewall cowl ring to the front of F-1 NOTE: The cowl ring
is "inside" the perimeter of F-1 by about 1/16" to allow for
the thickness of the cowl material
D 5 Use 6-minute epoxy to glue the five 1/2" x 1/2" x 1/4"
hardwood cowl mounting blocks into the notches of the
cowl ring
D 6 Install the engine with four #6 x 3/4" sheet metal
screws that have been provided with this kit Install a
Learjet 2-1/4" spinner (not included, GPMQ4542) on the
prop shaft.
D 9 Reinstall the spinner and prop then adjust the cowl to
clear the back of the spinner by 1/16" Securely tape the
cowl in position, then drill 1/16" (1 6mm) holes through the
cowl into the mounting blocks (using the centerlines you
drew in step 7) for the #2 x 3/8" cowl mounting screws
NOTE: A 1/16" plywood spinner ring has been included to
shim the front of the cowl if needed.
D 10 Cut the cowl as necessary to allow clearance for the
muffler, then remove the cowl and engine in preparation for
final sanding.
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