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HelicopterFlybarless Rotor Head SystemsV-Bar › Vbar & T/R Torque Pre-Comp
11-28-2011 10:52 PM  5 years agoPost 1
Smooth3D

rrApprentice

San Francisco Bay Area

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I got the 5.2 upgrade as a gift. Went through the upgrade process. all went well and it kept my settings. My Logo 600SE is much crisper now.

One Minor problem: The T/R pre-compensation. When I do a fast climb out the nose kicks left / Tail right. Doesn't feed in enough counter Torque.

How do I fix This?
Should I increase the collective PreComp value from default of 22 ( Main screen - Tail Rotor - Advanced - Torque Pre-Comp - Collective-- Default is 22 ?

Or is there something else I need to look at. Prior to upgrade the T/R was OK.

Thank you much.

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11-28-2011 10:56 PM  5 years agoPost 2
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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What version did you change from???

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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11-28-2011 10:57 PM  5 years agoPost 3
MrMel

rrProfessor

Gotland

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Have a look at this video, I think that will take care of it for you right away.

Watch at YouTube

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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11-28-2011 11:46 PM  5 years agoPost 4
superjosh

rrApprentice

Corona, CA

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I believe your precomp is to high for collective.

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11-29-2011 03:17 AM  5 years agoPost 5
Smooth3D

rrApprentice

San Francisco Bay Area

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Thank you MrMel..

I think balancing the parameters you've noted in the video is going to do it. I'll test it out over the next couple of days, I hope.

Cheers!!

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11-30-2011 06:36 AM  5 years agoPost 6
Sam2b

rrElite Veteran

Seattle, WA

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@superJosh
nose kicks left / Tail right
His description describes a counter clockwise rotation (with the torque). That means more collective torque compensation is needed, and/or tail rotor gain.

_Sam B_
Team MSH USA * Protos Max * Xpert servos * Cyclone Blades * ProgressiveRC * VoltMagic * Ecalc

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11-30-2011 07:44 AM  5 years agoPost 7
OICU812

rrMaster

Edson, Alberta, Canada

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You should always do what tests you need to acheive MAX tr gain prior to the tr comps IMO otherwise you'll get varied results. Do FFF or hurricane into funnel and look for shudder, till you see it you have room left. THEN do your tr comps. All IMO of course.

...Once upon a time there were Nitros, flybars and frequency pins...

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11-30-2011 12:32 PM  5 years agoPost 8
superjosh

rrApprentice

Corona, CA

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Your right, gave you the wrong info. I read your post a few times and still screwed it sorry about that.

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11-30-2011 12:37 PM  5 years agoPost 9
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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If it worked well before the update, why would it change after....unless he went from 4.0 to 5.2 (new setup)

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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12-01-2011 08:31 AM  5 years agoPost 10
Smooth3D

rrApprentice

San Francisco Bay Area

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Hey guys, thanks for the additional input.

I made the changes according to the video. Seems to be the path of least resistance !! I hope to be able to test it tomorrow if we don't have gail force winds out here again...

Ron: I upgraded from 5.0 Express to 5.2pro. I don't know why the behavior of the tail changed. I'll tweak the Tail prameters as suggested and we'll see.

I am so glad its all working, and Smooth again, Little setup still to do pm 5.2, but that kinda cool.. Most important I am so glad I was able to fix the squeaking tail belt / pulley noise.. things are back to Smoothness.

Doing my best to upgrade my flying and not my machine

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12-04-2011 07:03 AM  5 years agoPost 11
Smooth3D

rrApprentice

San Francisco Bay Area

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OK guys, I flew late today. First to release some stress, and also try out the changes MrMel suggested to improve things.
**
changed Torque PreComp Prameters -> Collective=10 & Cyclic=3
Changed Acceleration / P-Gain & I-Gain = 75 each.
Changed RC Deadband from 5 to 3
**

There seemed to be a noticeable improvement, however the T/R is not totally dialed, yet. From any upright attitude, If I go easy while increasing collective its good, but If I punch it, the tail still kicks right, but less than before the above edits.

Tomorrow, I will try increasing the PreComp parameters a bit more to see what happens.

Also; noticed the T/R control loop optimization is 81 / 62.. Is this OK?

Cheers!

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