13
PREFLIGHT SETUP AND RECOMMENDATIONS
ADJUSTING UPPER ROTOR BLADE TRACKING
ADJUSTING SERVO TRAVEL AND GYRO SENSITIVITY
❑
Servo travel and gyro sensitivity can both be adjusted using the adjustment
tool included with your M.A.S.H. Army Rescue Chopper. By default, servo
travel is set to maximum and gyro sensitivity is set to 50%.
We suggest
that you leave these settings exactly as they are.
Servo Travel:
Turning the screw counterclockwise will make the servo arms move less with the same amount of control stick input. Turning the screw
clockwise will make the servo arms move more with the same amount of control stick input. By default, servo travel is set to maximum.
Decreasing the amount of servo travel will result in smoother control inputs, but will also result in reduced control response.
Gyro Sensitivity:
Turning the screw clockwise will increase the gyro sensitivity and turning the screw counterclockwise will decrease the gyro sensitivity.
If when you increase power, the tail of the helicopter moves back and forth or moves quickly in one direction, increase the sensitivity
of the gyro by turning the screw clockwise 1/8th of a turn. Continue to increase the sensitivity until you're satisfied with the result. It's
not suggested that the sensitivity be set below 50% or the helicopter will be more difficult to control.
When spinning, both upper rotor blades should
be even with each other. They should not
appear to waver or oscillate up and down.
●
Double-check that the LiPO battery is fully charged and that the transmitter batteries are good. When the transmitter is turned on
the green LEDs should light up.
●
The LiPO battery should be charged and/or "topped off" shortly before flight. The battery will lose some of its charge over time, so
don't charge the LiPO battery the day before, then expect it to produce full power when you're ready to fly.
●
Double-check that the rotor blades are straight and that the rotor blade mounting screws are tight. Even with the rotor blade mounting
screws tightened, the rotor blades can still pivot under pressure. This is normal.
●
Double-check that the flybar stabilizer weights are pulled out to the ends of the flybar.
●
Double-check that the trim levers are adjusted so that the swashplate is level and that all of the fasteners are tight.
PREFLIGHT CHECKS
The upper rotor blade tracking on your helicopter is preset from the factory, but you should double-check it before flying for the first
time and anytime after a crash. The lower rotor blade tracking is fixed and therefore is not adjustable.
❑
To adjust the rotational plane, disconnect the ball-end from the rotor
head. If the blade with the masking tape was higher when rotating, turn the
ball-end /2 of a turn counterclockwise to lengthen the linkage assembly. If
the blade with the masking tape was lower when rotating, turn the ball-end
/2 of a turn clockwise to shorten the linkage assembly.
❑
Reconnect the ball-end and test the rotational plane of the rotor blades
again. Repeat the procedure until satisfied with the alignment.
❑
Place a /2" square piece of masking tape over the leading edge of one
upper rotor blade, near the tip of the rotor blade.
❑
Firmly hold the helicopter at eye level, making sure that the rotor blades
are free of any obstructions. Smoothly open the throttle until the rotor blades
begin to spin at a high rate of speed. You will notice that the flybar will be
level once the correct rotor speed is reached. Watch the rotational plane of
the upper rotor blades. The rotational plane of both blades should be the
same (i.e., level). If they are not, adjustments need to be made.
CONTINUED
