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❑
Divide the measurement found in the previous procedure
in half.
❑
Measure this resulting distance and draw one horizontal
line above and one below the horizontal thrust line.
☞
As an example, if using the Magnum XL .61ARNV, you
would draw the two lines 1-1/16" above and 1-1/16" below the
horizontal thrust line.
Step 2: Installing the Engine Mounting Beams
❑
Remove your engine from the mounting beams and
install them to the firewall using four 4mm x 20mm socket-
cap screws, four 4mm flat washers and four 4mm blind nuts.
Tighten the screws firmly to draw the blind nuts into the back
of the firewall.
☞
We suggest applying threadlocker to the screws to
prevent them from coming loose during flight.
Step 3: Aligning and Installing the Engine
❑
Slide the spinner backplate onto your engine and secure
it into place using your engine's prop washer and nut.
❑
Set the engine onto the engine mounting beams.
❑
Using a ruler, measure the distance from the firewall to
the back of the spinner backplate. Adjust the depth of the
engine so the measurement is 5".
❑
Using a pencil, mark the locations of the engine mounting holes onto the mounting beams. Remove the engine
and drill 3/32" diameter pilot holes through the beams at the marks you drew.
☞
Be careful to drill the holes straight down and not at an angle.
❑
Carefully enlarge the pilot holes using an 11/64" diameter drill bit.
❑
Install the engine using four 4mm x 25mm socket-cap screws, eight 4mm flat washers and four 4mm lock nuts.
❑
Using a drill with an 11/64" diameter drill bit, drill a hole through the firewall at each of the four intersecting lines.
IMPORTANT
So the upper engine mounting beam will fit properly, you may need to cut away a portion of the balsa
stringer from the top of the firewall.
