Owner manual

Guilin Feiyu Electronic Technology Co., Ltd.
Guilin Feiyu Electronic Technology Co., Ltd http://www.feiyu-tech.com [e-mail]
Page 11
11. Calibrate the Compass
DOS has a built-in magnetic field sensor which can measure the earth’s orientation position, providing the
basis of the hover function. If the magnetic field is disturbed, the hovering mode will draw a circle motion and
be unable to hover.
DOS internal procedure will correct magnetic field in real time, since the magnetic field will change if the
motor starts, so the best way is that control aircraft spin over three circles after take-off. The internal procedure
will calibrate the magnetic field automatically. This is very critical, and can affect the hover mode directly.
Attention: If you want to save the compass calibration value permanently, please landing and wait the aircraft
automatic into the state before execute Combination Stick Commands (CSC) and do the gyro reset. The
compass calibration value will be saved into DOS through the gyro reset procedure.
12. Flight essentials
To achieve satisfactory results, you need to pay attention to the following aspects
1). Good shock mounting is very important, which not only can make a more smooth flight, but also
conducive to the inertial device for measurement of displacement.
2). Try to minimize the interference of the surrounding environment of the internal magnetic field sensor when
you install the DOS.
3). Adjust altitude balance parameters, try to use the larger parameters if the control parameters do not
cause shock. The altitude control has a certain hardness and stability.
4). Before take-off, switch to the Altitude Stabilized Mode, check whether the gyro need initialization.
5). The GPS module should support installation away from interference. You should wait for the green light
double flash each loop or triple flash each loop before take-off.
6) . After take-off, control the aircraft rotation to make three circles, all while making sure the magnetometer is
satisfactorily corrected.
13. Other considerations
(1) Please as far as possible to maintain the current altitude when switching Attitude Stabilized Mode to
Hovering Mode. In Hovering Mode, DoS can automatically control flight altitude. Climbing and descending rate
is directly related to the throttle, when the throttle stick is in the center position,DOS automatic locks the
altitude, in maximum means climb rate is 3 m/s, in minimum means decline rate is 1.5 m/s. The throttle stick
can linearly control the aircraft climb and decline rate.
There are two very important points:
1) To prevent sudden change to the altitude caused by the throttle, you have to put throttle stick back to
balance flight position when switching off hovering mode.
2) After connecting the GPS module, please do not take off yet. You should wait until the GPS positioning LED
shows the GPS positioning is in a good condition(Green light double flash each loop or triple flash each loop).
(2)
1) Please control your aircraft fly 0.8 meters above to the ground, which will give you a good control effect. And