Model Tech Mini Mach Racer Assembly Instructions Manual page 11

sTeP 3: iNsTalliNg The CoWliNg
q Install your motor, using four M3 x 12mm machine screws and four M3 flat
washers, making sure to tighten the machine screws firmly.
IMPORTANT It's not necessary to use the two plywood spacer plates
with this type of motor.
q Cut out the back of the cowling along its base, making sure to cut the back
edge straight.
q Using the moulded scribe lines as a guide, cut out the sides of the cowling to
clear the wing leading edges, then cut out the holes in the front and the bottom
of the cowling for the propeller adapter and the three cooling intake holes.
IMPORTANT Depending on the motor that you're using, you may need
to cut out more of the front of the cowling than shown.
q Slide the cowling onto the front of the aircraft and align it. When aligned
properly, the hole in the middle of the cowling should be centred around the
motor shaft and the back of the cowling should fit flush against the surface of
the aircraft. The cutouts in the side of the cowling should fit over the contour
of the wing leading edges, too.
IMPORTANT You may need to cut a notch in the bottom of the cowling
to fit around the front of the landing skid.
q When satisfied with the fit and alignment, hold the cowling securely in place,
using a couple of pieces of masking tape.
q Drill two 1/16" (1.6mm) diameter pilot holes through each side of the
cowling for the wood screws. Position one pilot hole centred between the top
of the cowling and the top of the wing, and one pilot hole centred between the
bottom of the cowling and the bottom of the wing. All four pilot holes should be
1/8" (3mm) in front of the back edge of the cowling.
q Remove the cowling and apply a couple of drops of thin C/A into the four
pilot holes and allow the C/A to fully cure.
q Install the cowling, using four M2 x 10mm washer-head wood screws.
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