Great Planes Ultra Sport 40 Kit - GPMA0410 - Manual (Page 22)

F-1 and use it as a guide for drilling the four 5/32" holes.
If you will be using a different mount, note that the mount
should not be positioned on the vertical and horizontal
centerlines of F-1, but, due to the engine thrust angle,
should be offset approximately 3/32" above the center-
line and 1/8" toward the left side. Drill the holes and
install the blind nuts on the back of F-1, pressing them in
with a pliers or a vise.
aft edges of F-1, and glue them in place.
DRILL ENGINE MOUNT
(Great Planes MM40 or MM60 mounts)
1. Place the engine pointing straight ahead on the
mount and mark the mounting hole locations on the
mount. At the marked locations, accurately drill 7/64"
(or#36) holes. NOTE: If you have access to a drill press,
use it for drilling these holes to insure that they are drilled
vertically.
2. Now you may use one of the following methods
to attach your engine to the mount:
Method 1: Screw the #6 x 3/4" sheet metal
screws (provided in the kit) through the engine mounting
flange and into the mount. When first installing these
screws, put a drop of oil into each screw hole.
Method 2: Cut threads into the holes you just
drilled using a 6-32 tap and tap wrench. If you use this
method you'll have to supply your own bolts (6-32 x 1"
socket head cap screws) for attaching the engine to the
mount
8. Use 30-minute or 5-minute epoxy to securely
glue F-1 to the fuse sides, holding with clamps or tape
until the glue has firmly set. NOTE: Before the glue
sets, double check to make sure F-1 is properly aligned
with the top and bottom edges of the fuselage, and fully
back against the firewall spacers. After the glue has fully
hardened, sand off the front of the fuse sides flush with
the front of F-1.
INSTALL SERVOS AND PUSHROD GUIDE
TUBES
NOTE: Although you may choose to wait until
later, this is the best time to install the pushrod
guides, because the fuselage is wide open and it is
very easy to work inside.
IMPORTANT: Before proceeding, plan your
servo and pushrod installation. Especially note which
side of the fuselage the throttle pushrod and nose gear
pushrod (if any) will be located. Remember that the
throttle arms of2-cycle and some 4-cycle engines arc on
opposite sides. It will be helpful to actually sketch your
pushrod locations on the plans with a pencil. It is
desireable for the throttle pushrod (and the nosegear
steering pushrod) to run along the sides of the fuselage.
1. Set the fuselage upside down on blocks at least
1-inch high.
9. Cut pieces of 1/4" balsa triangle to fit around the
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