T-rex 450se V2 Rudder Trim Problem

[moyesboy]

The telebee is a bit fussier to setup than a 401, but if you get it right you can fly with one no probs - but a 401 is better.
May I point yuo to www.trextuning.com if you search there you will findsome good instructions to setup a telebee which is the same as the align rce wahtsit with a different badge.

Step one
Plug tail servo direct to rx and with rudder ch endpoints on 100% check the linkage doesn't bind at full throw each way, and that the rudder goes the right way (you obviously got that bit right).

step 2.
The gain is set with ch5. when ch 5 is low you have rate mode, when ch 5 is high you have heading hold. As ch 5 moves to centre then yuo get less gain until in the middle you have no gain, so no output, and neither hh or rate mode. Make sure you have HH mode when you power up and don't move the rudder or the heli until the redlight comes on on the gyro. try 70-80% gain, that is 70-80 of the way from the middle to the end point (you can plug a servo in to see what ch5 is doing)

step 3
turn the heli 30 degrees and see that the gyro moves the servo the right way to restore the pointing direction back to where it was (you have this right becuase you can fly, if it is wrong the heli spins out of control - the reverse switch on the gyro fixes that).

setp 4 rudder trim must be centred.

step 5
In HH hop the heli. note that it will try to face the way it was when you powered up - if you switch into rate and back then it will reset the heading.
The gyro should keep ther heli ponting the right way.If it wanders slowly from side to side up the gain, if it wags fast, reduce the gain.

step 6
Switch to rate mode and hop the heli again. it will turn. you must correct this turn by adjusting the linkage, or moving the servo on the boom, until it will hover with no rudder input. Impossible to get absolutely correct but near enough.

step 7
go back to hh and you might find you can up the gain a bit.

you may find it wags a bit in forward flight and you have to back off the gain a little once you are flying about.

Tips
The gyro is a cheap one and has some temperature drift. compared to when it was first switched on it might start to turn the heli in HH mode with no rudder after it warmed up. If you power it up and leave it for 5 mins, then swtich off and switch on again immediately it will be more stable on that new initialisatin becuase it is already warm.

Aslo look for nigel fraser kers setup tips which include dealing with this gyro.

[jamiem]

nutz, how much for the 401?

[Nutz]

It is brand new in box with a S9254 I want £110 for gyro and servo, if I got to split it then I want £80 for the gyro and £40 for the servo.

[notscratcher]

Hiya
Thanks for all your help peeps, i think that gy401 and servo is going to have to wait about 6 weeks . Only just layed out for the heli!
Im going to give the telebee a chance today by setting up the heli the way you have told me, and see if all go's well. I will tell you all if it went well, as im going to try setting it up again today, this setting up the heli is very time taking lol. As for letting the gyro warm up , will the battery lose much power while im waiting???????

many thanks james

[notscratcher]

Hi again.
Right i setup the heli so that it could hover with almost no tail drift, and ive done that with hh off, and no trim to the rudder at all
ive now put hh back on and got it to hover and all seems good, i do get a little drift in the rudder still but not much, i sposs the tail drifts about 10 deegrees every say 1min....that doesnt seem to bad to me...im happy with it for the min. I have the gyro gain on 80% both ways, if i put that to say 90% both ways and still get the drift and still dont have a wag of the tail would that compensate for the wind better then 80% both ways????


many many thanks for all your help peeps....