Top Flite TOPA0101 - Manual (Page 30)

❏
15. Cut two 3-1/8" long elevator fillet blocks
from 3/8" x 1/2" stock. Tack glue one to the root
end of each elevator. Carve and sand them to
match the taper of the elevators. Bevel the root
end until the blocks mate to the fuselage when the
elevators are both
neutral (make sure the
elevators are both aligned the same). Glue the fillet
blocks to the fuselage while the elevators are both
neutral. When the elevator blocks are properly
glued to the fuselage, break loose or cut through
the tack glue joints, leaving the fillet blocks
attached to the fuselage. Sand the root end of the
elevator to provide clearance between the elevator
and the fillet.
FIREWALL AND ENGINE
INSTALLATION
Read through this entire section
before proceeding!
Depending on your choice of engine, 2-stroke or
4-stroke, you may have to be a little inventive for
engine mounting and throttle, tank and muffler
hookup. The installation of a 2-stroke .60 to .75
size engine with a Top Flite In-Cowl Muffler
(TOPQ7915) is pretty straightforward. Some
4-stroke engines allow the throttle linkage to be
rotated 180 degrees, thereby permitting the same
servo setup as a 2-stroke engine. The O.S. .91
Surpass is one such engine.
This model flies very well on an O.S. .61 SF
2-stroke engine. As the .61SF also allows for the
most “sterile” setup with everything contained in
the cowl, we will detail its installation.
❏
1. Mark a horizontal and vertical centerline on
the firewall F-1 . Mark a line 3/16" to the right of the
centerline. (If the engine mount is centered on this
line, 2 deg. of right thrust starting at the firewall will
cause the prop shaft to be centered in the cowl.
❏
2. Spread 30-minute epoxy over the entire
firewall. Use multiple strips of masking tape to hold
the firewall to the fuselage while the epoxy cures.
Install the firewall so the reference lines are vertical
and horizontal.
❏
3. Decide how you will mount the engine. For a
.61 size 2-stroke engine, mounting at a 45 degree
inverted position will allow the cowl to be installed
as shown on the plans. Mounting the engine in
other positions will require the cowl mounting bolts
to be relocated.
❏
4. Remove the spacer bar from the back of both
engine mount halves and trim off any burrs. Snap
the Engine Mount halves together and place the
engine between the rails, adjusting the width
between the rails accordingly.
❏
5. Position the engine so that the propeller
backplate is exactly 5-3/4" (146 mm) from the aft
30