R4
STEP 9-4 FINAL SERVO AND RADIO SETUP
9. Throttle Curve
It is very important to match the throttle curves to those of the main blades. Throttle values should be adjusted so that the engine does not over rev
when the pitch range is close to zero degrees and the rotor head should not exceed 2,200 rpm under any circumstances. Below are three examples of
throttle curves for basic flight conditions.
NOTE:
Throttle curves values can vary greatly due to engine and muffler combinations and so it will be necessary to fine tune these settings by test
flying to achieve the best results.
0%
50%
100%
100%
50%
0%
50%
100%
100%
50%
0%
50%
100%
100%
50%
STICK POSITION
NORMAL MODE
STICK POSITION
IDLE UP
STICK POSITION
AUTOROTATION
THROTTLE HOLD
10%
10%
10. Engine Adjustment
For optimum results it is important that the engine is set up to run properly, and since this depends on the setting of the mixture needle, the best position
should be obtained by running he engine on the bench if possible. If you are using a brand-new engine, please refer to the manufacturers instructions for
the break-in procedure.
NOTE:
For the first flights always run the engine a little rich and adjust for optimal performance as you progress. Remember, a lean engine is a dead
engine.
11. Final Checks before attemping to flights
Before attempting to fly please go through this manual and double check your work again.
Check that the main and tail rotor blades turn in the correct direction.
- Check to ensure that all of the servos are operating smoothly and in the correct direction and that each servo horn is secured with a screw.
- Ensure that the throttle servo is working properly and in the correct direction.
- Check that the gyro is operational and compensating in the correct direction.
- Make sure that both the transmitter and receiver have been fully charged.
- Check that the main and tail rotor blades are installed correctly.
- You are now ready for your first flight with the X-TREME 50 and your next step is the adjustment of your engine. Since this depends on the fuel, plug
and weather conditions we suggest that you seek help from an experienced helicopter pilot if possible.
