Trouble Shooting - THUNDER TIGER mini Titan E325 Manual

TROUBLE SHOOTING

Helicopters
Q: What would you check when the helicopter shakes during flying?
a.
A: Are the main blades out of track?
b.
Are the paddles out of track?
c.
Are the main blades well balanced?
d.
Are the paddles well mounted at the same distance from the
rotor shaft?
e.
Is the spindle or the flybar bent?
f.
Is the main shaft bent?
g.
Is the main rotor hub damaged?
h.
Is the motor well installed and is the shaft of the motor bent?
i. Is the tail rotor shaft bent?
j.
Is the tail rotor hub damaged?
k.
Do all the ball bearings work well?
Q: What would you do if there comes out a lot of noise from the
helicopter during flying?
a. Please check the gear mesh between the main gear and the
A:
motor pinion. If there is too much gear mesh, it would generate
a lot of gear noise during flying.
b. If the tail drive belt is too loose, it will bring about some noise
and may cause the failure of tail control.
c. Check the linkages and control system of main rotor and tail
rotor to make sure every linkage is working correctly and not
colliding with something else.
d. Check if the motor is running out of balance.
Motor, Battery and Speed Controller
Q: How to choose the motor and the pinion?
A: It depends on the battery and the motor. The following is the formula
of how to calculate the wanted head speed.
Motor RPM = Motor KV x Volt(3.7V) x Series x constant (0.8)
Head Speed = Motor RPM / Gear Ratio
Gear Ratio = 150T / Motor Pinion
Example:
We choose TT OBL 29/35-10H brushless motor.
IF using a 3S(11.1V) Li-Po battery, the motor rpm should be
3500KV x 3.7V x 3S x 0.8= 31080 rpm
And we expect to have the head speed of 2600~2800rpm
31080 / Gear Ratio = 2800
Gear Ratio = 11.1
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