❑
4) Remove the cowling and set it aside for now, while installing
the throttle pushrod.
THROTTLE PUSHROD
Locate the following parts from the kit contents:
❑
(1) Nylon Outer Pushrod Sleeve (already in the fuselage)
❑
(1) 1/8” od x 16” Nylon Inner Throttle Pushrod Tube
❑
(2) M2 x 7/8” Threaded Studs
❑
(2) Metal R/C Links
Note: Most 2-stroke engines provide low throttle when the throttle
arm is pulled fully back toward the rear. High throttle is forward.
Check your carburetor and confirm the correct direction of travel
for "low" and "high" throttle movement and then check the throttle
servo to be sure it also moves in the right direction.
❑
1) Install your throttle servo in the fuselage, using the rubber
grommets and screws that came with the servo. Mount the servo
in the front opening in the servo tray, lengthwise across the fuse-
lage. For a 2-stroke engine like ours, the servo arm should be to-
wards the left side of the airplane, as shown in the photo below.
❑
2) The outer sleeve for the throttle pushrod is already installed
in the fuselage, but not glued. Position the sleeve so the servo
end is approximately 1/4” behind the fuselage former that is right
in front of the throttle servo. Then glue the sleeve to the former.
❑
3) Screw a M2 threaded stud into one end of the 1/8” od x 16”
nylon inner pushrod tube - thread it in at least 1/4" or more. Then
screw an R/C link halfway onto the stud. NOTE: If the stud screws
into the plastic tube too easily, not getting a good “bite” in the plas-
tic, put some epoxy glue or medium CA on the threads and in the
end of the tube before screwing it in.
❑
4) Insert the unprepared end of the nylon inner pushrod tube
inside the pushrod sleeve, starting at the servo end inside the
fuselage. Slide the inner pushrod tube all the way forward until
you can snap the R/C link into the last outermost hole of the throt-
tle servo arm. Note: You will need an extra long or adjustable arm
on the throttle servo, so that the outermost hole is in line with the
pushrod sleeve.
❑
5) Finish the engine end of the throttle pushrod as follows:
a) Turn on your radio system and move the transmitter throttle
stick to full high throttle position.
b) Clip an R/C link and threaded stud into the bottom hole of
the carburetor throttle arm.
c) Put the carburetor in full high throttle position.
d) Use a marker pen to mak the nylon pushrod tube where it
should be cut and still accept 1/4" of the threaded stud.
e) Use a sharp blade to cut the pushrod tube at the mark.
f) Take the R/C link and threaded stud off the carburetor throt-
tle arm. Screw the end of the threaded stud at least 1/4" into the
end of the nylon pushrod tube.
g) Reattach the R/C link to the carburetor.
h) Turn on the radio system and test the operation of the throt-
tle pushrod and carburetor. Use the EPA (End Point Adjustment)
feature of your transmitter to accurately dial-in the desired amount
of pushrod travel. Make adjustments to one or both of the R/C
links until you can achieve full range of throttle movement. Also
make sure there is no binding in the throttle linkage, which could
cause unnecessary battery drain.
The installation of your glow engine is now completed. Skip the
next section on electric motors and proceed directly to “Attach The
Tail Surfaces” on page 14.
If you are going to use an electric motor system in your RASCAL
72 EG, you will need to acquire these items (not supplied):
❑
(1) Electric Motor and suitable Propeller
❑
(1) Motor Mount
❑
(1) set of suitable Mounting Bolts and Blind Nuts
❑
(1) ESC (Electronic Speed Control)
❑
(1) Battery Pack
❑
(1) set of Connectors (Battery-ESC)
❑
(1) 3/4” wide Hook-and-Loop (Velcro®) sticky-back Tape
❑
(1) 3/4” wide Hook-and-Loop (Velcro®) Strap
There are literally dozens of good electric motors and accessories
on the market that are suitable for flying the RASCAL. All of them
have their own unique features and dimensions, making it impos-
sible to write detailed instructions for every brand. As mentioned
in the beginning of this manual, we will be installing a Maxx Prod-
ucts #HC3528-1000 brushless outrunner electric motor, with the
Maxx Products #ACC3958 Motor Mount, and a Castle Creations
ESC. Even if you use other brands, the following instructions
should provide you with enough guidance to successfully install
your electric power system.
IMPORTANT NOTE ON MOTOR MOUNTS: If you are using a
different brand electric motor or motor mount, you need to make
sure that the combination you select can provide exactly 4-1/2”
distance from the front of the prop adaptor to the front of the fire-
wall (i.e. back of the mount). 4-1/2” is the distance needed for the
cowling to fit properly.
11
ELECTRIC MOTOR INSTALLATION