http://lightake.com/detail.do/sku.KX015076_Superior_T_REX_450_Sport_Super_Combo_Kit-47023

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Trex 450 Frequent Problems And Solutions
1. Trex 450 aircraft nod
Reason 1: The propeller speed is too low. Workaround: hover point accelerator
(usually 65-70%), reducing the PITCH (usually 4-5 degrees),
Reason 2: damping apron strong or badly worn. Workaround: do not thicken the
horizontal axis washers, replacement of worn horizontal apron.
2. Trex 450 flying noise
Reasons: In addition to the large paddle, Trex 450 maximum noise motors, first check
the pinion gear and the gear gap is sufficient. Tight noise will be great, the judgment of
the usual gap: the left hand fixed motor gear, the right hand turning left and right gear,
have a slight gap, about 0.1mm,Large gear is usually a slight deviation, so check the
whole round, adjusting the gap the smallest place, if the gear gap is normal, you
check the motor, remove the motor power test; if the motor vibration, it is necessary to
replace the motor bearings; After the replacement, if the invalid to be replaced motors,
usually, the motor vibration is very small, rotation brisk.
3. Trex 450 body vibration
Reason 1: paddle imbalance, there is some of the big paddle, they are relatively poor
quality, too much weight and center of gravity deviation, when the high-speed rotation,
the eccentric vibration. Solution: Replace the good quality paddle, or bigger the
paddle's movement equilibrium.
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Reason 2: paddle lock tight, unable to throw off by centrifugal force, creating an
unbalanced solution: hand pulled the feeling that the damping is like, you can not lock
tight.
Reason 3: an imbalance of the tail rotor or tail rotor lock tight. This is not much.
Solution: get a new tail rotor locking tail rotor. Requirements and a large paddle.
Reason 4: motor quality is poor, did not do a good job balancing remove the motor,
then power idle check if you feel vibration on the replacement.
Reason 5: Spindle or associated bending, inspection methods: hand rotation propeller,
observe the brake head screws (excluding brake head screw bending factor), if found
to swing much, it could be the spindle bending, if the replacement of the spindle can
not be solve the problem, that is, the associated bend, spindle or associated bending
caused by imbalances in the big paddle, causing vibration. solution is simple: change
the spindle and associated.
Reason 6: The horizontal axis bending, inspection methods: remove the side of the big
paddle, 1.5 hex screwdriver to rotate the horizontal axis, to see whether the swing of
the big paddle folder represents the horizontal axis bent.
4. Trex 450 sculls issues
Reason 1: The bracket screws loose. Inspection methods: hand stuck in the Alliance,
shaking the flybar, flybar holder with a substantial shake the screws must be loose, the
screws to remove the glue plastic screws, locking.
Reason 2: mounting holes copper wear or bearing damage, check as above, if the
screw is not loose, that is the problem, solution: replacement of the copper sleeve or
bearing.
Reason 3: ball buckle wear, ball head buckle you want to check, if the axial gap
between the discovery of more than 0.5mm, to be replaced.
6. Trex 450 Emergency refueling, do not lock the tail (to exclude the factor of the gyro
and servo)
This is caused by the pulley or belt slipping. Inspection methods: hand stuck tail rotor
to rotate a large paddle, check whether the pulley slip, in general, plastic pulley prone
to this problem, a relatively small metal pulley. Solution: change the new metal tail belt
axle and new section belt drive wheel group. In addition, loose screws can cause
unlock tail.
By Travis Hu
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