Table of Contents
Advertisement
❏
2. Place 4" [102mm] of masking tape over each block
extending back to the fuselage. Measure back from the
center of the two blocks on the sides of the fuselage 3"
[76mm] and 2" [51mm] back from the center of the top block.
Draw a reference line on the tape as shown.
❏
3. Slide the cowl onto the fuselage. Position the cowl so
that it is centered on the engine crankshaft and so there is
approximately 1/8" [3mm] clearance between the front of the
cowl and the spinner backplate. Measure forward from your
reference lines 3" [76mm] on the sides and 2" [51mm] on the
top. Mark the cowl and drill a 3/32" [2.4mm] hole through
each of the marks. Secure the cowl to the fuselage with
three #4 x 1/2" [13mm] SMS. After mounting the cowl
remove the screws and put a couple of drops of thin CA into
the holes to harden the threads. Allow the glue to harden
before re-installing the cowl.
❏
4. This step is optional. The cowl fits closely to the
fuselage sides but this step will assure that the tip of the
cowl stays tight to the fuselage sides and will help to make
a good alignment with the accent stripes on the cowl and
fuselage. Measure forward from the tip of the cowl 1/2"
[13mm]. Drill a 1/16" [1.6mm] hole through the tip of the cowl
and through the fuselage side. Remove the cowl. Drill a
3/32" [2.4mm] clearance hole through the hole in the tip of
the cowl you just made. (You may wish to consider
countersinking this hole to allow the head of the #2 screw to
set into the cowl. This portion of the cowl has a resin build
up behind it so there is plenty of material to allow for
countersinking the head.) Apply a couple of drops of thin CA
into the hole in the fuselage to harden the threads. Re-install
the cowl using the #4 mounting screws.
❏
5. Look inside the fuselage to see where the screw has
come through. Glue a 3/32" x 1/2" x 1/2" [2 x 13 x 13mm]
plywood plate over the hole. Using a 1/16" [1.6mm] re-drill
through the hole, drilling through the plywood plate. Screw
the two #2 x 3/8" [9.5mm] SMS through the tips of the cowl
and into the plywood plates.
❏
6. Locate the spinner components. Install the bushing into
the backplate. If your engine has a larger crankshaft
diameter than the backplate or the bushing, you will have to
drill out the backplate to fit your engine's crankshaft.
22
Advertisement
Table of Contents
