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- Is the model too heavy?


- Is the center of gravity (fore and aft) within the range shown on the plans?
- Is the model balanced side to side? (right and left wings of equal weight)


Are all flying surfaces at the proper angle relative to each other?
- Are there any twists in the wings? (other than designed)


Control Surfaces
Are they all securely attached? (i.e. hinges glued, not just pushed in)
- Are the control throws in the proper direction and amount? (usually indicated in the plans)


Control Linkage
Have all linkages been checked to make sure they are secure?
- Are all snap-links closed?
- Have snap-links been used on the servo end? (They are more likely to come loose when used on the servo)
- Have all screws been attached to servo horns?


Electrics Motor, Engine and Fuel (if applicable)
Has the motor / engine been thoroughly tested?
- Are all engine screws tight?
- Has the motor / engine been run up at full throttle with the plane's nose straight up in the air? (To make sure it won't stall when full power is applied on climbout)
- Is the fuel tank level with the flying attitude of the plane?
- Is the carburetor at the same height (not above) as the fuel tank?
- Is the fuel tank klunk in the proper position and moving freely?


- Has a full range check been performed?
- Has the flight pack charge been checked with a voltmeter?
- Have the receiver and battery been protected from vibration and shock?
- Is the receiver's antenna fully extended and not placed within a fuselage with any sort of metallic covering?

After Repair
The checklist should be gone through again, with particular attention to the areas that were worked on or repaired.

Before EVERY Flight

- Start the engine (if applicable) and test the entire throttle range. Run it at full throttle with its nose in the air for 15 seconds or so.

- Check the receiver flight pack with a voltmeter to ensure enough charge.
- Check the control throw direction for all surfaces. It's very easy to do a repair or radio adjustment and forget to switch these.

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