Not flying level

[agh321]

Trying to tweek my trex 700 nitro with the spirit pro

Fast forward flight very sensitive on the elevator and worse out of a loop With pitching up

And inverted fast forward flight heading for the deck ime having to hold a bit of up trim in on the elevator to fly level

I've reset the swash on the sub trim so I know its not that

Any help please

[Alyon187]

If your cyclic gain is too high you can have very sensitive controls in fff so you could try lowering it to see if it helps. W the pitching up issue try raising the pitch up compensation a point at a time til it improves or gets worse. Check cg as well...

[ZeXx86]

Hi,

first from all I recommend to verify CG. It looks like something is very off - mechanically not correct.
If CG is not correct unit will try to hold it, but during FFF forces are changing a lot so compensations are not accurate.

You should never use any trim or subtrim in the transmitter. It should be zeroed all the time.

Next possibility is that vibrations are extremely high so I recommend to perform vibration analysis (without main blades).
This is also good to check overal state of the helicopter just to be sure everything is good.

If you observe abnormal sensitivity for elevator or extremely fast pitch up, then Cyclic Ring value is too low - configured mechanical limit is not high enough. Increasing the value will solve this problem. But from your description I guess this is not the case.
Increasing Pitch Up Compensation is mostly not needed. Problem is often somewhere else.

Do you use Flybarless blades?

[agh321]

Ok re checked the set up all ok
I am using fbl blades
And I've had to put 160 grams of lead on the nose to balance the heli with half a tank of fuel

So ime off to see what happens now

[agh321]

Ok I did everything that youve suggested and no joy ime afraid

Can't understand it because it flew great on v1.32 and now it doesn't

Is there any way of going back to the version v1.32

[ZeXx86]

Of course, you can install older version without any problem.
I believe that the problem is related only with the settings, because there is no difference in the firmware that could be responsible for this.

There is a big chance that after the update settings were not modified to match version 2. There are few things that when configured improperly will cause such issues.
After update from 1.3.X basic settings should be performed again, because e.g. subtrims may be wrong.

When you enable Subtrim (tuning) your swashplate should be perfectly level, all servos in the center and on the rotor head there should be 0° angle.

[agh321]

Of course, you can install older version without any problem.
I believe that the problem is related only with the settings, because there is no difference in the firmware that could be responsible for this.

There is a big chance that after the update settings were not modified to match version 2. There are few things that when configured improperly will cause such issues.
After update from 1.3.X basic settings should be performed again, because e.g. subtrims may be wrong.

When you enable Subtrim (tuning) your swashplate should be perfectly level, all servos in the center and on the rotor head there should be 0° angle.

Ok I understand what you are saying but I did check everything again and only had to sub trim on one servo by a couple of clicks to get the swash level
I've tried to go back to version 1.3.2 but it keeps asking for 1.3.2 software can you send me a link for that
Then I'll fly that version before re doing v2.0 again just to se it's not mechanical

[Coco66]

1.3.2 software:
http://www.spirit-system.com/dl/setting ... -win32.exe

[agh321]

1.3.2 software:
http://www.spirit-system.com/dl/setting ... -win32.exe

Ok just gone back to 1.3.2 Will fly asap and let you know

The only adjustments I've had to make we're reversing the pitch adj ail sub trim
And altering the 6deg ail elev from 8.5deg
L

[ZeXx86]

There are at least 4 different parameters that must be reconfigured for the new version again as stated during the Update and in the News in the announcement.
It can fly, but without precise adjustment and verification with the Cyclic Leveler it can suffer from various issues.