cx2 adjustments after rebuild

[RotaryOne]

Have put it back together following crash which took out both blades and also removed some teeth from the outer main shaft gear. In the meantime a heatsink has been fitted.

Carefully put it all back together and tested the motors before fitting new blades. Noticed that the swash plate was tilted to left but everything seemed to be working (servos etc) OK.

On pre-flight testing of the yaw/rudder control, i.e. with motors running move the yaw control left and then right to check that one blade and then the other slows down whilst the other one speeds up. Noticed that with the control to the right the lower blade spun more slowly than the top one, by quite a margin. This difference was confirmed by the strong tendency to yaw to the left on the cusp of lift-off with the training gear fitted.

On top of that it was also moving towards eight o'clock.

Have not changed any adjustments so settings should be the same and therefore the swash plate should be level, so don't understand why this has changed, unless this is a by-product of the crash. It seems the obvious thing to do to remedy this is to change the length of the left side servo rod. However, before I do this I thought it best to get some comments from the forum please.

Thanks in advance for any help on 1) remedying the motor speed differential affecting yaw and 2) the swash plate angle.

[matt27]

i upgraded my cx2 today with aluminium bits!!
there really good!!!!!!!!

i had to sort the lengths of the arms after this to get the swashplate level.
it's not to hard but just take your time and do it properly!!!!

[Boggy]

hi nigel sorry i missed your call last night!

basics first. are your trims all centered (exept throttle at zero)??? and batteries all good???

hold the heli down on a table and spin up the blades till both sets are just spinning.(becarefull if you hold the undercarriage it can come out under high throttle)
apply right rudder the top blades should increase speed quite significantly.and the bottom blades should stop.
apply left rudder and the bottom blades should increase speed and the top blades stop.
center the rudder and the bottom blades should run faster than the top always.

if your heli is moving towards 8 o'clock the swash must be low left and rear.firstly try the trims to see if you can get a stable hover if not center them pop the left link(always looking from rear) off and unscrew it a half turn.try again first using trims.
same with the yaw if your having difficulty controling it with trim post back!