How to check before maiden flight

[ThomasJoehnk]

Hi

I have setup my Minicopter joker II with the VStabi unit, but I am not sure if everything is ready for the first flight. I have checked:

1) The rudder behaves correctly (like if I used a heading-hold gyro).

2) The swashplate tries to stay level when tilting the helicopter - but only barely. E.g. when I turn the helicopter 45 degrees the swashplate only turns a few degrees in the opersite direction.

3) The sensor is mounted with the lead pointing forward.

4) With no transmitter input the swashplate tend to stay level

5) The swashplate and rudder reacts correctly to transmitter input.

6) The swashplate stays within limits when transmitter iput is taken to the extrems.

7) I have not changed any gain or other advanced parameters.

Any other things to check would be appreciated!

:-) Thomas

[jakeg1999]

Sounds like you are ready to go...I know for me, my gains were low for my first flight so I just kept raising them each flight thereafter....it's a pretty cool system, and I too was very nervous for my first flight and hover with it, but it went off without a hitch....good luck...

[hamslice]

just remember to relax and dont move the cyclics until the heli lifts off. you will be fine.

[Mercuriell]

Sounds good - main dangers are reverdeds cyclic gyros and it sounds like yours are good

[jaxrotor]

just remember to relax and dont move the cyclics until the heli lifts off. you will be fine.

I made this comment on the other forum and was told it was no different than the flybar. I let three guys try the V-Bar as it is new to us and they had trouble at liftoff,but after they saw how it reacted they had no trouble.

Strange?

[ThomasJoehnk]

Hi

Finally I got my Joker II with VStabi airborne. My only problem now is that the tail wags a lot regardless of how I set the rudder gyro gain (kreiselempfindlichkeit on 'heck' tabpage in the VStabi setup program). I have tried with the values 75, 50, 25 and 15!

How do I get rid of this wag'ing of the tail???

:-) Thomas

[Dynamic]

Try using a different type of foam tape to mount your sensor, it is possible that your sensor (gyro) is picking up an ocsillation or vibration.

make sure that you have your mechanical setup of the servo correct, and that your torque offset (tail symetry) is set correctly for your bird. Stock is 15 the trex 600 baseline is 7, not sure about the jokers.

Check the length of your tail servo horn to make sure it is an ideal length and is not reacting to inputs too quickly (too long) or to slowly (too short).



Those are just some things that came to mind that could induce a wag if not setup correctly.

[Zaaaguy72]

Mounting tape for the sensor makes a huge difference. I used the Zeal tape on mine and it shakes alot. I put a strap over the top of the sensor and that stopped it from shaking and the system tightned up.

[ThomasJoehnk]

I have solved my tail wag problem. I was not aware that Gyro Gain could be set to values larger than 100. I now have a value of 120 and the wag problem has disapeared.

My only problem left is that the tail drifts slowly to the left (as seen from a tail in hover). O the next flight I will try with a little higer 'Symmetrie' value (10 or 12 instead of 7). But I thought that the rudder gyro i the VStabi unit ought to work like a HEADING HOLD gyro where trimming is not used.

Can anybody put some light on what exactly the 'Symmetrie' parameter does and especially why it is requiered.

:-) Thomas