15
1-1/2"
2-5/8"
38 mm
67 mm
2-3/16"
56 mm
The recommended C.G. is
2- 3/16" [ 56 mm]
back from
the leading edge of the wing. The recommended C.G.
range is from 1-1/2"— 2-5/8" [ 38 mm — 67mm ].
❏
5. Set a Great Planes C.G. machine to 2-3/16" [56mm],
or mark the recommended, starting C.G. location on the top
of the wing where shown in the diagram.
❏
6. Install the canopy hatch. At this point the model should
be completely ready to fl y with the wing, propeller and spinner.
Test the C.G. by placing the model on the C.G. machine, or
lift at the lines you marked indicating the recommended,
starting C.G. Shift the battery forward or aft to get the model
to balance.
❏
7. Once the location of the battery has been determined,
make a mental note of this location, or mark the inside of
the fuselage or the battery tray to position the battery here
for the proper C.G. when fl ying the model.
❏
8. Make a battery strap by overlapping 3" [75mm] of the
included hook-and-loop strap material. Insert the strap
through and under the battery tray and cut the strap to the
correct length to secure the battery.
❏
9. Double-check the C.G. and, if necessary, reposition the
battery and adjust any marks you may have made, noting
the battery’s location for the desired C.G.
Balance the Model Laterally
❏
1. Lift the Piper several times by the propeller shaft and
the tail to see if one wing drops.
❏
2. If one wing drops consistently, add weight to the
opposite tip by sticking it to the outside or strategically
concealing it inside the balsa tip.
An airplane that has
been laterally balanced will track better in fl ight and
maintain its heading better during maneuvers when the
plane is climbing.
MOTOR/BATTERY/PROPELLER INFORMATION
WARNING:
Never have the flight battery
connected to the ESC without the transmitter
turned on – after each fl ight (or any time after
running the motor)
always
disconnect the battery
before
turning off the transmitter. And when ready to fl y (or
whenever running the motor for any reason), always turn
on the transmitter fi rst before connecting the motor battery.
Also make certain your
Fail Safe
is programmed correctly so
in the event the receiver loses signal (or, if you inadvertently
turn off the transmitter before disconnecting the battery or
vice-versa) the motor will not turn. Follow the instructions
that came with your radio control system to check and
set the Fail Safe.
The recommended RimFire .10 is rated for 30A constant
current and 35A surge current, so it is desirable to load (prop)
the motor to operate within that limit.
For starters, an APC 9 x 6E (on a 3S LiPo) draws about
24A static, but averages a little less than 15A with “normal”
throttle use. This is a suitable propeller choice and fl ies the
Cherokee well—it can be zoomed around or cruise at lower
throttle for more scale-appearing fl ight and extended air time.
We’ve also fl own the Cherokee with a 10 x 5.5 MR (Multi-
Rotor). The current draw is only slightly higher, so this is
also a suitable propeller choice.
With every propeller, fl ight time depends greatly on how you
use the throttle.
