Decisions You Must Make; Radio Equipment; Glow Engine Recommendations - GREAT PLANES U-Can-Do SF Instruction Manual

2. You must assemble the model according to the
instructions. Do not alter or modify the model, as doing so
may result in an unsafe or unfl yable model. In a few cases
the instructions may differ slightly from the photos. In those
instances the written instructions should be considered as
correct.
3. You must take time to build straight, true and strong.
4. You must use an R/C radio system that is in fi rst-class
condition, and a correctly sized engine and components (fuel
tank, wheels, etc.) throughout the building process.
5. You must correctly install all R/C and other components so
that the model operates correctly on the ground and in the air.
6. You must check the operation of the model before every
fl ight to ensure that all equipment is operating and that the
model has remained structurally sound. Be sure to check
clevises or other connectors often and replace them if they
show any signs of wear or fatigue.
7. If you are not an experienced pilot or have not fl own this type
of model before, we recommend that you get the assistance
of an experienced pilot in your R/C club for your fi rst fl ights.
If you're not a member of a club, your local hobby shop has
information about clubs in your area whose membership
includes experienced pilots.
8. While this kit has been fl ight tested to exceed normal use,
if the plane will be used for extremely high stress fl ying, such
as racing, or if an engine larger than one in the recommended
range is used, the modeler is responsible for taking steps to
reinforce the high stress points and/or substituting hardware
more suitable for the increased stress.
9. WARNING: The cowl and wheel pants included in this kit
are made of fi berglass, the fi bers of which may cause eye,
skin and respiratory tract irritation. Never blow into a part to
remove fi berglass dust, as the dust will blow back into your
eyes. Always wear safety goggles, a particle mask and rubber
gloves when grinding, drilling and sanding fi berglass parts.
Vacuum the parts and the work area thoroughly after working
with fi berglass parts.
We, as the kit manufacturer, provide you with a top quality,
thoroughly tested kit and instructions, but ultimately the
quality and fl yability of your fi nished model depends on how
you build it; therefore, we cannot in any way guarantee the
performance of your completed model, and no representa-
tions are expressed or implied as to the performance or
safety of your completed model.
REMEMBER: Take your time and follow the instructions
to end up with a well-built model that is straight and true.

DECISIONS YOU MUST MAKE

This is a partial list of items required to fi nish the U-Can-Do SF
that may require planning or decision making before starting
to build. Order numbers are provided in parentheses.

Radio Equipment

The U-Can-Do SF requires a minimum 4-channel radio system
with a minimum of fi ve 72 oz.-in. [5.2 kg-cm] minimum torque
standard sized servos and an additional standard torque servo
if you are installing a glow engine.
For maximum 3D performance, we recommend using digital
servos with at least 72 oz.-in. [5.2 kg-cm] of torque.
In addition, two 12" [305mm] servo extensions are required
for the aileron servos and three 24" [610mm] servo extensions
are required for the tail servos. A 6" [152mm] servo extension
is required for the ESC if you are installing a brushless motor.
If you are using a radio system that does not support mixing
functions, a Y-harness will also be required to connect the
aileron servos to the receiver. You will also need a reversing
Y-harness to reverse the rotation of one of the elevator
servos in order for both elevator halves to move together in
the same direction.
Recommended part numbers for the radio components are
provided below:
❍ Futaba S3010 Standard High-Torque BB Servo
(FUTM0043)
❍ Futaba S3050 Digital Standard High Torque BB MG
Servo (FUTM0300)
❍ Futaba S3004 Standard Ball Bearing Servo
(FUTM0004)
❍ Hobbico 6" Extension Futaba J (HCAM2000)
❍ Hobbico 12" Extension Futaba J (HCAM2100)
❍ Hobbico 24" Extension Futaba J (HCAM2200)
❍ Futaba Dual Servo Extension 6" J (FUTM4130)
❍ EMS Servo Reverser Futaba J (EMOM0027)
❍ Ernst Charge Receptacle Futaba J FM (ERNM3001)
❍ Futaba SWH13 Switch Harness & Charge Cord Mini J
(FUTM4370)
❍ Great Planes Heat Shrink Tubing 3/8x3" (3)
(GPMM1060)
If you plan to install a brushless motor, the availability of space
on the battery tray will limit you to a standard 4.8V receiver
battery (larger batteries may fi t inside the fuselage but there
are no provisions for mounting them). If you installed a glow
engine, a standard 4.8V receiver battery or a high energy
6.6V LiFe battery can be used. The high energy density and
6.6V nominal voltage rating would be a good match for this
3D model. The installation of a LiFe battery is shown in the
manual. A charger capable of safely charging a LiFe battery
is also required. Recommended part numbers are provided:
❍ Hobbico HydriMax NiMH 4-Cell 4.8V 2000mAh Flat
AA Rx U (HCAM6321)
❍ Hobbico LiFeSource LiFe 6.6V 2100mAh 10C
Receiver U (HCAM6436)
❍ Hobbico LiFeSource AC/DC Balancing Charger 1S-
3S (HCAM6375)

Glow Engine Recommendations

The recommended engine/motor size for the U-Can-Do SF is
a .55 –.65 cu in [ 9 –10.5cc] two-stroke engine or .82 [13.5 cc]
four-stroke engine. Choose a propeller based on the engine
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