BASIC SETUP
After the MS-044 installation it is needed to setup the gyro corresponding to the application.
Servo Limit Setup
Firstly, a setup of the servo travel Limit must be set up corresponding to the mechanical possibilities of the tail control system. Start with
setting the LIMIT trim to approximately 75% then reset the gyro (by power off and on). Check if the maximum mechanical travel is not
smaller than the electronic one (the rods will bend, or the servo will buzz). If yes, decrease the LIMIT trim, reset the gyro and check
again. This is an repetitive process, which is, of course, influenced among others by the servo horn length.
For MS 10 servos, the proper distance between the control pushrod link and the horn rotation axis is 8-10 mm. For other servos, adjust
the horn in a way the LIMIT trim value is in range of 75°%o - 100%.
Attention! When setting up the gyro LIMIT function, the electronic travel limit in the transmitter must be set to 100% (i.e. No
limit of the servo travel), or, if this is not possible, the maximum mechanically available value!
After the gyro setup, it is
recommended to adjust the electronic servo travel in the transmitter in such a way, so that the servo travel limit an the transmitter is the
same as an the gyro. This eliminates a „dead zone", which occurs if the gyro limit is set to a lower value, than the maximum travel setting
an the transmitter.
Gyro Mode Selection and Gain Setup
The gyro mode selection and gain setup is performed either by a GAIN%DELAY trim, or by a transmitter channel.
In Gases when the trim is used for the Mode and Gain setup:
If the GAIN/DELAY trim is set to 50% (middle of the entire travel), the gain is minimal.
If the trim knob is turned counter-clockwise (the value is decreased from 50 to 0%), the gyro is set to the
Standard Mode,
and the gyro
gain is indirectly proportional to the trim value (the lower the value, the higher the gain) in the Standard Mode.
If the trim knob is turned clockwise (the value is increased from 50 to 100%), the gyro will operate in
Heading-Hold Mode,
and thee
gain is directly proportional to the trim
V
alue -the higher setting. the higher gain.
Don't forget to reboot
the
gyro after each trim setting change, otherwise the new setting will not he accepted by the gyro.
In cases when a radio channel is used for the Mode and Gain setup:
If a free radio channel is used to control the gyro mode and gain, the mode and gain can he changed anytime during the gyro
Operation. Normally Channel No. 5 is used (or the gyro control. This channel is connected to a slider (or switch), and the gyro control
itself is very similar to a control by the trim.
If the value of the channel is below 50%, the gyro is in Standard Mode, and the gain is indirectly proportional to the channel setting (the
lower the setting, the higher the gain.
1f the value of the channel is above 50%, the gyro is in Heading-Lock mode, and the higher the channel value, the higher the gyro gain.
When using the slider, we recommend to set the maximum values of the channel so they correspond to the maximum usable gyro gain.
The maximum gain is recognized by a very slight wagging of the tail of the heli in flight. More convenient is to control the gyro mode
and gain by a switch. In such a case we strongly recommend to set the channel values so that there is a small reserve to the maximum
possible (on the particular model) gain, because there is no way to quickly reduce the gain when the switch is activated. 1 the Standard
Mode is used. normally a REVO-mix is set up in the transmitter. For the Heading-Lock
Mode, the REVO-mix MUST BE DISABLED!
The active REVO-mix will cause an error in the tail neutral position during the flight. If you whish to use the gyro in both modes, we
recommend to use the Standard Mode for hover, where the REVO-mix is not a crucial function, and Heading-Lock Mode for aerobatics.
If your transmitter al lows, you can combine die gyro mode setup, REVO-mix activation with the idle-up or other throttle
controls.
Delay Setup
1his function is active only if the gyro Mode and Gain is set from a transmitter - the function activates when the gyro gain cable is fitted
to the receiver. The right setup of the gyro Delay function will depend an the mode) type, and pilot's preferences. Typically, the smaller
the model, and the slower the tad servo, the lower the Delay trim value. For Hornet hell, the initial setup is 0.
MS-044 OPERATION
Gyro MS-044 is designed for use also in very small helicopters, where the ratio between the tail rotor weight and the tail servo speed is
very inconvenient for precise tail control.
Hic lighter the tail, the Duster is the tail position change, and the Taster must be the servo and the gyro, if the System is to be stable
even in complicated aerobatic situations, or fast backward flight.
Because of the overall flight dynamics of very small models, in the Heading-Lock mode it is normal when the tail slightly oscillates in
hower in complete still (indoor). This is caused by a fact the model can not react an a very small gyro corrections. This effect disappears if
the System is loaded by any control command, change of the main rotor torque or by movement in any direction. ATTENTION - similar
effect as described above can he caused by vibrations transferred to the gyro. Such excessive vibrations are usually caused by incorrectly
mounted (too tight) main rotor blades, or non symmetrically mounted tail rotor blades. If the tail oscillation is too high and if it does not
disappear when the gyro operates in Standard Mode, check the hell setup!
In a dynamic flight the MS-044 gyro provides excellent stabilization.