RunRyder RC
WATCH
 1 page 1441 views POST REPLY
HomeAircraftHelicopterFlybarless Rotor Head SystemsFutaba CGY › CGY 750 ROT Equa - Heli Drifts Left
06-03-2012 09:14 PM  6 years agoPost 1
Big Edge

rrApprentice

Oldsmar, FL USA

My Posts: All  Forum  Topic

When I enable ROT Equa (Rotational equalizer) the heli drifts to the left in a hover - like there's a small amount of left aileron being held on the stick.
I correct with right aileron but when the stick returns to center the heli starts its drift to the left again.

With ROT Equa (Rotational equalizer) OFF the heli sits in a solid hover, no drift.
Feels very good in flight as well. Although, piros aren't as stable.

Any ideas?

Here's some specs:
Stock Trex 550E V2
100% throttle in idl 1 and 2

Phase Equalizer is OFF (no difference off or on)
ROT His 16 (Default)

AFR
Ail - 51
Ele - 55
Pit - 58

Gyro Gains
Rud - 45
Ele - 80
Ail - 90

I Gain
Ail - 40
Ele - 30

D Gain
Ail - 100
Ele - 100

Thanks,
Edge

-----------------------------
Don't taze me bro...

PM  EMAIL  GALLERY  Attn:RR  Quote
06-05-2012 01:28 AM  6 years agoPost 2
malagese

rrNovice

utica new york united states

My Posts: All  Forum  Topic

Hello, I hope someone answers u becuase I am having same issue with one of my heli's with cgy. My other 3 heli's with cgy are perfect

PM  EMAIL  GALLERY  Attn:RR  Quote
06-05-2012 01:39 AM  6 years agoPost 3
rstacy

rrElite Veteran

Rochester, NY

My Posts: All  Forum  Topic

I have seen this a couple of times.
Both times the ROT Eqa was reversed from what it should be.
Check the direction again.
It makes for sloppy piros when this is backwards.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
06-05-2012 02:34 AM  6 years agoPost 4
Big Edge

rrApprentice

Oldsmar, FL USA

My Posts: All  Forum  Topic

Verified direction as shown in this Youtube video.. and just confirmed on the bench.

Watch at YouTube

Aft elevator is applied during directional verification.
Turning the heli nose to the right - right aileron is applied.
As heli turns, swashplate maintains the same orientation as starting point.

Piros were not all over the place as would be expected if the direction was reversed.

Heli CG is nearly perfect with the ESC mounted in front under battery.
(Turnigy 40C 5000 Mah)
BEC and GCY mounted on side frames directly center of main shaft.

Thank you very much for the reply..!

-----------------------------
Don't taze me bro...

PM  EMAIL  GALLERY  Attn:RR  Quote
06-05-2012 04:09 AM  6 years agoPost 5
rstacy

rrElite Veteran

Rochester, NY

My Posts: All  Forum  Topic

Does it drift if you put the 750 in rate mode? (all 3 axes)

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
06-05-2012 04:48 AM  6 years agoPost 6
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

And, if you separate your idle up trim from whatever flight condition in which you boot up and trim the model in that idle up and when in AVCS, will the model the hold still?

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

PM  EMAIL  GALLERY  Attn:RR  Quote
06-05-2012 01:28 PM  6 years agoPost 7
Big Edge

rrApprentice

Oldsmar, FL USA

My Posts: All  Forum  Topic

I have not yet entered Rate Mode. Only booted up and flown in AVCS.
Also checked my trims in all flight modes and they are all 0, no trim.

I'm hoping to get some flight time this weekend. Will try Rate mode and see what happens.
And, if you separate your idle up trim from whatever flight condition in which you boot up and trim the model in that idle up and when in AVCS, will the model the hold still?

Ben Minor
Sorry Ben, I'm not sure I understand how to perform this process..

Appreciate your help guys,
Edge

-----------------------------
Don't taze me bro...

PM  EMAIL  GALLERY  Attn:RR  Quote
06-05-2012 01:56 PM  6 years agoPost 8
rstacy

rrElite Veteran

Rochester, NY

My Posts: All  Forum  Topic

I have not yet entered Rate Mode. Only booted up and flown in AVCS.
Also checked my trims in all flight modes and they are all 0, no trim.

I'm hoping to get some flight time this weekend. Will try Rate mode and see what happens.
Thats a problem. I am guessing that you have never completed a trim flight if you have never been in rate mode.

The 750 is pretty forgiving but doing a trim flight makes it so much better.
Sorry Ben, I'm not sure I understand how to perform this process..
Are your trims separate or combined?

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
06-05-2012 05:52 PM  6 years agoPost 9
Big Edge

rrApprentice

Oldsmar, FL USA

My Posts: All  Forum  Topic

Thats a problem. I am guessing that you have never completed a trim flight if you have never been in rate mode.

The 750 is pretty forgiving but doing a trim flight makes it so much better.
Copy that. Trim flight in Rate mode will be my next task.
Are your trims separate or combined?
How do I verify that?
Tranny is a 8fg super.

Edit: With some Google searching - found in the t1-t4 menu.
It appears the default is COMB.
Need to check my transmitter.

-----------------------------
Don't taze me bro...

PM  EMAIL  GALLERY  Attn:RR  Quote
06-05-2012 10:42 PM  6 years agoPost 10
Big Edge

rrApprentice

Oldsmar, FL USA

My Posts: All  Forum  Topic

Are your trims separate or combined?
Trims are seperate.

-----------------------------
Don't taze me bro...

PM  EMAIL  GALLERY  Attn:RR  Quote
06-06-2012 12:11 AM  6 years agoPost 11
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

Do the trim flight in rate mode as Ray suggested. If you still detect a drift in flight, you may trim it in AVCS mode as long as you boot the system up in a flight mode that has no trim in it. As long as the system is booted up in a condition with no trim in it, it will follow any trim input present in other flight conditions with separated trims.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

PM  EMAIL  GALLERY  Attn:RR  Quote
06-06-2012 01:33 AM  6 years agoPost 12
Big Edge

rrApprentice

Oldsmar, FL USA

My Posts: All  Forum  Topic

In my searchng I find there's different thoughts on Trimming.
Here's the process as I understand it from the manual and other Dr. Ben posts.

1. Verify the the ELE and AIL gyros are set to 50% or less in Normal mode.
2. Arm the ESC in normal with no trim in the model at all.
3. Hover the model and trim for Roll.
(Pitch trim is acomplished with GC adjustments)
4. Switch the gyro gain from Normal to AVCS 3 times in 1 second.
(I have my ELE and AIL Normal/AVCS switching setup on switch SD)

Then:
Copy to all flight modes.
Remove trim from Normal mode.

Is this process correct??

-----------------------------
Don't taze me bro...

PM  EMAIL  GALLERY  Attn:RR  Quote
06-06-2012 10:46 PM  6 years agoPost 13
aviator493

rrNovice

Bristow, VA USA

My Posts: All  Forum  Topic

Interesting problem. I'm having "right" drift issues with my 750 both in rate and avcs mode. I think I am going to go back and check my setup and maybe start again just to be sure I got it right.

I did check some of the above recommendations pertaining to "ROT EQU" but all is set perfectly.

PM  EMAIL  Attn:RR  Quote
06-07-2012 01:30 PM  6 years agoPost 14
Big Edge

rrApprentice

Oldsmar, FL USA

My Posts: All  Forum  Topic

I believe I have a better understanding of gyro trimming now..

Each gyro can be trimmed independantly using Rate mode.
With seperate trims, each flight mode/condition - Normal, idle 1 and idle 2 can then have it's own trim setting.

Hovering trim may be different than trim needed for F3C or 3D type flying.

If your swash is setup correctly, using the trim memorization technique seems to be the way to go.

The trim copy function on the 8fg makes it easy to copy trim to different flight modes.

-----------------------------
Don't taze me bro...

PM  EMAIL  GALLERY  Attn:RR  Quote
06-07-2012 01:38 PM  6 years agoPost 15
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

Each gyro can be independently trim in separated flight conditions in AVCS too as long as the system is always booted up in a condition with zero trim. The system can only memorize one trim setting for the gyros. I PERSONALLY do not bother memorizing trim into the 750 because I always boot mine up with zero trim and have the system precisely trimmed for hover and for aeros (AIL trim varies a little bit; no ELE trim ever in any flight condition). It's just a matter of taste and understanding of how the 750 treats trim.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

PM  EMAIL  GALLERY  Attn:RR  Quote
06-08-2012 06:13 PM  6 years agoPost 16
Big Edge

rrApprentice

Oldsmar, FL USA

My Posts: All  Forum  Topic

Thanks for the info Ben..
If work doesn't get in the way I'm gonna do a trim flight on my 550 this Sunday.
I'll report back and hopefully this drift issue is no more..!

-----------------------------
Don't taze me bro...

PM  EMAIL  GALLERY  Attn:RR  Quote
06-11-2012 01:35 AM  6 years agoPost 17
Big Edge

rrApprentice

Oldsmar, FL USA

My Posts: All  Forum  Topic

Performing the trim flight resolved the issue..!

6 flights on the 550 today.

Lesson learned.

-----------------------------
Don't taze me bro...

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1441 views POST REPLY
HomeAircraftHelicopterFlybarless Rotor Head SystemsFutaba CGY › CGY 750 ROT Equa - Heli Drifts Left
 Print TOPIC  Make Suggestion 

 7  Topic Subscribe

Sunday, July 22 - 2:22 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online