CEI Conrad Electronic International Limited RCE-NAVIGATOR User Manual

Flying The Navigator 250  |  27

 

D

Compass calibration should be done at open outdoor area. The calibration process

may fail due to magnetic interference from surrounding environment.

Failing of compass calibration is indicated by 3 prominent beep sounds (3 beeps). In case

of failure:
1.  Move away from magnetic interferences.

2.  Disconnect the flight battery and re-connect it.

3.  Restart the procedure.

 

Successfully completed calibration procedures can be skipped.

 

Before you install the battery, turn on the transmitter. An unbound aircraft is considered

uncontrolled.

 

Inspect  the  Navigator  250  for  damage  before  every  flight.  Replace  damaged

components before flying again. Only use original spare parts.

 

Ensure the motor arms are fully unfolded in flying position and the locking screw/nuts

are completely tightened.

 

Ensure the propellers can freely rotate without hitting any parts of the Navigator 250 body.

 

Observe the condition of each motor:

 

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Motor shaft

 

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Motors can freely rotate

 

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Propeller position and condition

 

Always replace defective parts immediately.

 

If you are unsure about your product’s condition consult an experienced RC pilot or

contact our customer support. Do not attempt any further flight until the Navigator 250

is fit for flight.

Place the Navigator 250 on a level surface (e.g. stone floor). Take note of chapter

.

Refer to chapter 

and also study

. 

 

D

Start with simple flight manoeuvers and gradually proceed to more challenging ones.

1.  Place the Navigator 250 on even ground, wait and observe the GPS signal reception level.

2.  Turn on the motors.

3.  Check proper functioning of aileron, elevator, throttle and rudder.

4.  Increase throttle until the Navigator 250 is at least 50 cm above the ground.

 

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At this height, you have passed the so-called ground effect and the Navigator 250

is more stable in its flight position, thus can be controlled more easily.

 

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Be careful when applying rudder, which will rotate the Navigator 250 around

its vertical centre axis, causing you to become disoriented. Study carefully how

aileron and elevator behave after applying rudder.

5.  You  have  now  managed  the  critical  part  and  can  familiarize  yourself  with  the

Navigator 250 by gentle throttle motions.

6.  To land, decrease the throttle slightly until it gravitates to the ground.

 

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A somewhat solid touchdown is no problem and should not be corrected with

jerky throttle movements.

 

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Attempt to touch down vertically (“helicopter landing”). Avoid landing with high

horizontal speeds (“airplane landing”) to prevent the legs from getting entangled,

resulting in the Navigator 250 tumbling.

7.  After landing, turn off the motors.

8.  Disconnect the battery.