21
METHOD 2:
Mounting the Cowl with Wood Screws
Hard point
Hard point
❏
A. If using wood screws to fasten the cowl, mark
the screw hole locations over the
hard points
under the
covering on both sides of the fuselage where shown.
❏
B. Make four
screw hole templates
as shown from thin
plastic or cardstock. Tape the templates to both sides of
the fuselage, aligning the holes in the templates over the
marks made over the hard points.
❏
C. Fit the cowl into position. If you haven’t yet done so,
trim the propeller cutouts in your spinner cone to fi t the
propeller, and then mount the propeller and spinner.
In the following steps it may be helpful to have an
assistant drill the holes while you hold the cowl…
❏
D. Holding the cowl in position, use one of the templates
as a guide to drill the fi rst 3/32" [2.4mm] hole through the
cowl into the fuselage.
❏
E. Enlarge the hole
in the cowl only
with a 1/8" [3.2mm]
drill. Mount the cowl to the fuselage through that fi rst screw
hole with a #4 x 1/2" [13mm] Phillips screw.
Don’t forget to put the 3/32" [2.4mm] drill bit back into
your drill before drilling the next hole.
❏
F. Holding the cowl in alignment again, drill the second
3/32" [2.4mm] screw hole. Enlarge that hole
in the cowl
only
and insert the second screw.
❏
G. Drill the two holes and mount the other side of the
cowl to the fuselage the same way.
❏
H. After all the holes have
been drilled remove the cowl.
Use CA to glue the thin,
plastic bushings to the inside
of the cowl centered over the
holes.
❏
I. Add a few drops of thin
CA to each screw hole in the
fuselage and allow to harden.
Summary of Contents for Sequence 1.20
Page 31: ...31 ENGINE CUTOUT TEMPLATE FOR O S 1 55FS a...
Page 32: ......
