Just curious; gpro quality?

[tourerjim]

Just set up my first Gpro yesterday and was amazed how easy it was. I fly Futaba and used the Sbus connection to reduce the number of connections going to the receiver...So far so good as they say.

What heli you setting your Gpro on,

[Nigel Armstrong]

Hi, I have fitted it into a new Trex 550L. The set up went very well as I said in my last post. However, I have a very slow "Wag" of the tail that I just cant get rid off!! Flew it today and have tried various Tail Gain settings without any success. Back at home the tail linkage and smoothness of the tail pitch slider have all been tested and found to be fine. Starting to run out of ideas now.

[600srad]

Nigal, try adjusting rudder gyro gain in the g pro software to somewhere between 90-95 then adjust gyro gain in your transmitter as normal.
You can tell if overall gain is too high by very low gain in the transmitter.
On my 600 I aim for transmitter gain around 60 (spektrum)
Hope this helps.
Ian

[Nigel Armstrong]

Hello Ian. I have tried turning the Gain up using the Gpro software. I even tried it turned up to the 120% limit. It was still the same. I wont be able to do any more testing until Sunday now due to work commitments. I will set the Gpro to 95% and turn the gain on my transmitter down to 60% as you suggested and report back.
When flying the model in fast circuits and doing some basic aerobatics the model feels very good in the Cyclic controls. My idle up 1 is set to a flat line 80% and I was very pleased with the way the model flew. If we can crack the wag problem then this should be a very good model. The build quality was very good with everything fitting as it should. I look forward to the next trip to the heli pad

[tourerjim]

Hello Ian. I have tried turning the Gain up using the Gpro software. I even tried it turned up to the 120% limit. It was still the same. I wont be able to do any more testing until Sunday now due to work commitments. I will set the Gpro to 95% and turn the gain on my transmitter down to 60% as you suggested and report back.
When flying the model in fast circuits and doing some basic aerobatics the model feels very good in the Cyclic controls. My idle up 1 is set to a flat line 80% and I was very pleased with the way the model flew. If we can crack the wag problem then this should be a very good model. The build quality was very good with everything fitting as it should. I look forward to the next trip to the heli pad

If that doesn't work lower left/right gain stops a little as ive found these can also effect tail gain.

[Nigel Armstrong]

I have now managed to get out and do a little more testing on my Trex 550L fitted with the Gpro. I now have the "Gain" set at 70% in the Gpro. I have disabled the gain adjustment in the TX and have made all adjustments via my laptop. A this setting there is still a very sight wag of the tail whilst in the hover. However this almost vanishes in fast forward flight. I have also reduced the left/right gain stops a little. The "I" gain has also been reduced by 5%.
For the moment I am going to live with this slight problem and concentrate on getting to grips with this superb little model. I have never flown a helicopter that looped and rolled with so little effort. I look forward to trying out some new manouvers and trying to crack flying inverted.

[Grumpy]

Slow wag is usually due to too high 'I-gain'.. so try adjusting it down a bit further in the software.
I-gain is the heading hold part of the gain and is adjustable independently of master gain. On the old Align 3GX I-gain (3GX called it 'Rudder locking gain') used to default to 70 but on some helis you needed to drop it to around 40 to stop that lazy wag of the tail.