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KeithT · 09-26-2009, 05:22 AM

Ok - I have got the K3 airborne at last - into a hover at least.

I noticed it still tends to want to rotate anti-clockwise but does so in sort of 'jerky' movements. Not wagging bac and forth, just a staged and gentle rotation.

Now I can control and reverse this, as my HBFP needs constant tail input, but I guess it should really hold very steady.
It has a BuzzFly HH gyro and I am using the BuzzFly 8Ch Tx/Rx with the HH gain set to 70%.

My question is - is that something I should keep trying to minimise by moving the rudder servo minute amounts, or is it best to trim it out? If the answer is trim, would that be sub trim or main trim?

Thanks for any advice

leonmike · 09-26-2009, 08:45 AM

I always use the sub trim for my helis instead of the main trim...

Magenta · 09-27-2009, 05:33 PM

For a gyro in HH mode, trim (sub or otherwise) should not be used to attempt to correct a problem.

If the gyro doesn't hold, then the gyro isn't setup correctly, the mechanics (including tail rotor speed) aren't setup correctly, the radio isn't setup correctly, or the gyro is a POS

Dusty1000 · 09-28-2009, 04:41 AM

Did you set it up in rate mode first?

Dusty

KeithT · 09-28-2009, 04:29 PM

Hi Dusty - yes I did - and re-set it again today.....
Need to hover test tomorrow if it's not too windy.
I'll post back when I get a chance.
Thanks for the input
Cheers

09-26-2009, 05:22 AM	#1 (permalink)
KeithT Registered Users Join Date: Nov 2008	Set up help Ok - I have got the K3 airborne at last - into a hover at least. I noticed it still tends to want to rotate anti-clockwise but does so in sort of 'jerky' movements. Not wagging bac and forth, just a staged and gentle rotation. Now I can control and reverse this, as my HBFP needs constant tail input, but I guess it should really hold very steady. It has a BuzzFly HH gyro and I am using the BuzzFly 8Ch Tx/Rx with the HH gain set to 70%. My question is - is that something I should keep trying to minimise by moving the rudder servo minute amounts, or is it best to trim it out? If the answer is trim, would that be sub trim or main trim? Thanks for any advice __________________ Raptor 50 TitanSE - AR7200BX + RJX head Raptor 550E with a flybar!! Align 500 pro with Speed fuselage mCPX V2

09-27-2009, 05:33 PM	#3 (permalink)
Magenta Registered Users Join Date: Feb 2007	For a gyro in HH mode, trim (sub or otherwise) should not be used to attempt to correct a problem. If the gyro doesn't hold, then the gyro isn't setup correctly, the mechanics (including tail rotor speed) aren't setup correctly, the radio isn't setup correctly, or the gyro is a POS __________________ One more heli won't hurt anything

09-28-2009, 04:41 AM	#4 (permalink)
Dusty1000 Registered Users Join Date: Sep 2008	Did you set it up in rate mode first? Dusty __________________ Blade 400, mSR, mCPX - Sonix SX450SE - Walkera 1#A, 4#3, 4#3A, 4#3B, 4G3

09-28-2009, 04:29 PM	#5 (permalink)
KeithT Registered Users Thread Starter Join Date: Nov 2008	Hi Dusty - yes I did - and re-set it again today..... Need to hover test tomorrow if it's not too windy. I'll post back when I get a chance. Thanks for the input Cheers __________________ Raptor 50 TitanSE - AR7200BX + RJX head Raptor 550E with a flybar!! Align 500 pro with Speed fuselage mCPX V2

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09-26-2009, 08:45 AM	#2 (permalink)
leonmike Registered Users Join Date: Feb 2009	I always use the sub trim for my helis instead of the main trim...

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