GRAUPNER Micro Star 1000, Руководство пользователя

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Micro Star 1000
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The “normal” power curve is suitable for hovering and circuits.
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The “aerobatic” power curve prevents the motor stopping at any position of the collective
pitch stick. This means that you must only select this curve when the model is already flying.
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The values stated above can only be a guideline as they vary greatly with the motor in use.
For this reason there is no alternative but to fine-tune them during the test-flying programme.
2.4 Further adjustments
If you have made up all the linkages exactly as described in the previous sections, no changes
to the mechanical arrangements will be necessary. The following adjustments can all be carried
out at the transmitter:
1. Dual Rates
You can set switchable travels for roll-axis, pitch-axis and tail rotor if you wish. As a starting
point we recommend 100% and 75% as the two Dual Rate settings.
2. Exponential
For the basic set-up you should leave all control systems set to a “linear” curve.
3. Servo travel centre offset
Do not make any adjustments to this point. At a later stage you may wish to make minor cor-
rections here.
4. Servo travel adjustment
This is where you can adjust the maximum servo travel. The travels should always be the
same on both sides of neutral, otherwise you will end up with unwanted differential effects:
The collective pitch servo should produce a range of blade pitch angles covering -10° to
+10°, with symmetrical travels; you may find it necessary to remove the servo output arm,
move it round by one spline and fit the retaining screw again. When the collective stick is at
centre (hover point), collective pitch should be about 5°, and the speed controller should be
at the “half-throttle” position.
Note:
The collective pitch and power curves can be adjusted later to meet your personal require-
ments. However, if you have already set differential travels in the basic set-up procedure, as
shown in diagram “B” above, any fine adjustments required later will be more difficult!
5. Collective pitch and power curves
These adjustments are of fundamental importance to the flight performance of any model
helicopter. The aim of the procedure is to maintain a constant rotor speed when the model is
climbing and descending, i.e. regardless of load. This then represents a stable basis for fur-
ther fine-tuning, e.g. of the torque compensation system etc. (see also “Collective pitch and
throttle curves”).
6. Static torque compensation (not if the gyro system is set to heading-lock mode)
The tail rotor servo is coupled to the collective pitch function via a mixer in the transmitter in
order to compensate for changes in torque when you alter the collective pitch setting. On
most transmitters the mixer input can be set separately for climb and descent. Recom-
mended values for the basic settings are: climb: 35%, descent: 15%.