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12

2- 5/16"

[ 59 mm]

 1. If using a Great Planes C.G. Machine, set the 

rulers to 2-5/16" [59 mm]. If not using a C.G. Machine, 
use a fi ne-point felt tip pen to mark lines on the top of 
the wing on both sides of the fuselage 2-5/16" [59mm] 
back from the leading edge. Apply narrow [1/16" [2mm] 
strips of tape over the lines so you will be able to feel 
them when lifting the model with your fi ngers.

This is where your model should balance for the fi rst 
fl ights. Later, you may experiment by shifting the 
C.G. 1/8" [ 3 mm] forward or 3/16" [4.8 mm] back to 
change the fl ying characteristics. Moving the C.G. 
forward will improve the smoothness and stability, 
but the model will then be less aerobatic (which 
may be fi ne for less-experienced pilots). Moving the 
C.G. aft makes the model more maneuverable and 
aerobatic for experienced pilots. In any case, 

start at 

the recommended balance point 

and do not at any 

time balance the model outside the specifi ed range.

2- 5/16" [ 59 mm]

 2. With the wing attached to the fuselage and all 

parts of the model installed (ready to fl y), place the 
model upside-down on a Great Planes CG Machine, 
or lift it upside-down at the balance point you marked.

 3. If the tail drops, the model is “tail heavy.” If the 

nose drops, the model is “nose heavy.” Move the motor 
battery forward or aft to balance the plane. If moving 
the motor battery does not shift the weight enough, use 
Great Planes “stick-on” lead (GPMQ4485) to balance 
the plane. To fi nd out how much weight is required, 
place incrementally increasing amounts of weight on 
the bottom of the fuselage over the location where it 
would be mounted inside until the model balances (the 
horizontal stabilizer is level). A good place to add stick-
on nose weight is to the fi rewall. Do not attach weight 
to the cowl—this will cause stress on the cowl and 
could cause the cowl to come off the fuselage. Once 
you have determined if additional weight needs to be 
installed, it can be permanently attached.

Do not rely upon the adhesive on the back of the 
lead weight to permanently hold it in place. Over time, 
vibration may cause the weight to fall off. Instead, 
permanently attach the weight with glue or screws.

Note: 

We have found on our sample models that we 

were able to balance the plane at its forward and aft C.G. 
locations by moving the motor battery. No additional 
weight was required.

 4. 

IMPORTANT:

 If you found it necessary to add 

any weight, recheck the C.G. after the weight has 
been installed.

CHECK LIST

During the last few moments of preparation your 
mind may be elsewhere anticipating the excitement 
of the fi rst fl ight. Because of this, you may be more 
likely to overlook certain checks and procedures 
that should be performed before the model is fl own. 
To help avoid this, a check list is provided to make 
sure these important areas are not overlooked. 
Many are covered in the instruction manual, so 
where appropriate, refer to the manual for complete 
instructions. Be sure to check the items off as they 
are completed (that’s why it’s called a 

check list!

)

 1. Check the C.G. according to the measurements 

provided in the manual.

 2. Be certain the motor battery is securely mounted 

in the fuse. Make sure the battery straps around the 
motor battery are tight.

 3. If you still fl y on 72MHz, extend your receiver 

antenna and make sure it has a strain relief inside 
the fuselage to keep tension off the solder joint inside 
the receiver.

 4. Balance your model 

laterally

 as explained in the 

instructions.

 5. Use threadlocking compound to secure critical 

fasteners such as the screws that hold the wheels on 
the landing gear and the motor to the motor mount.

 6. Add a drop of oil to the landing gear so the wheels 

will turn freely.

 7. Give the control surfaces a quick tug to make 

sure all hinges are 

securely

 glued in place.

 8. Reinforce holes for wood screws with thin CA 

where appropriate (servo mounting screws, cowl, etc.).

 9. Confi rm that all controls operate in the correct 

direction and the throws are set up according to the 
manual. Checking the direction should be performed 

Summary of Contents for Mini Contender Ep

Page 1: ...r accepts all resulting liability If the buyer is not prepared to accept the liability associated with the use of this product the buyer is advised to return this kit immediately in new and unused con...

Page 2: ...rights and interests and is required to fly at most R C sites Academy of Model Aeronautics 5151 East Memorial Drive Muncie IN 47302 9252 Ph 800 435 9262 Fx 765 741 0057 Or via the Internet at http www...

Page 3: ...f Adhesives and Building Supplies that are required to finish the Mini Contender EP ARF 1 2 oz 15g Thin Pro CA GPMR6001 Pro 6 minute epoxy GPMR6045 Threadlocker thread locking cement GPMR6060 Mixing s...

Page 4: ...d separately but is only available with the wing kit Replacement parts are not available from Product Support but can be purchased from hobby shops or mail order Internet order firms Hardware items sc...

Page 5: ...ion to one of the aileron servos Secure the extension to the servo lead with a piece of heat shrink or electrical tape not included 2 Carefully pull the string from the aileron servo opening and tie i...

Page 6: ...heet metal screws 2 Install a 1 8 3mm wheel collar and 4 40 x 1 8 3mm machine screw followed by a 1 7 16 35mm foam wheel and a second wheel collar and machine screw Apply a drop of threadlocker on the...

Page 7: ...bilizer and apply four drops of thin CA to the top and bottom of each CA hinge INSTALL THE SERVOS 1 Connect a 6 152mm servo extension to the rudder and elevator servos Use heat shrink or electrical ta...

Page 8: ...the nose gear block Insert the nose gear pushrod in the nylon nose gear steering arm and then slide the nose gear through the steering arm Secure the steering arm with a 3 x 6mm socket head cap screw...

Page 9: ...tray and trim the battery strap to fit 5 Route the servo wires to the ESC receiver compartment Plug the servos into the receiver and place the receiver in the compartment 6 Place the compartment cover...

Page 10: ...f the fuse under the TE of the fin Do this several times 2 If one wing always drops when you lift the model it means that side is heavy Balance the airplane by adding weight to the other wing tip An a...

Page 11: ...way If your radio does not have dual rates we recommend setting the throws at the high rate settings NOTE The throws are measured at the widest part of the elevators rudder and ailerons These are the...

Page 12: ...t can be permanently attached Do not rely upon the adhesive on the back of the lead weight to permanently hold it in place Over time vibration may cause the weight to fall off Instead permanently atta...

Page 13: ...d correct the problem first Look for loose servo connections or broken wires corroded wires on old servo connectors poor solder joints in your battery pack or a defective cell or a damaged receiver cr...

Page 14: ...excessive speeds TAKEOFF Before you get ready to takeoff see how the model handles on the ground by doing a few practice runs at low speeds on the runway If necessary adjust the nose wheel so the mod...

Page 15: ...mple if you re going to do a loop check your altitude mind the wind direction anticipating rudder corrections that will be required to maintain heading remember to throttle back at the top and make ce...

Page 16: ......

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