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HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsSkookum › SK360 tail wag vs stability
04-08-2010 09:53 PM  8 years agoPost 1
denizcan

rrNovice

Ankara - Turkey

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I sent the similar info to skookum, however, there is no reply.

My Trex 450 with flybar flies much better than my flybarless Trex 600..

I installed SK360 on Trex 600 ESP, on the tail boom case. (The plastic part that boom is attached to). I used the tape suplied, and other brands of foam tapes. I also tried adding metal plate sandwich to reduce the vibration..

The problem is the wag of tail. If I reduced the hiller dial, the wag went out but this time the heli did not hold well, if I increase the dial, it holded fair (not as good as flybar with weigh though), but wagging comes back. If I leave the heli in hover, the tail slides down step by step, not smooth, but stays 1 second, then steps down a little, and waits 1 second.

What do you suggest? Where is the best location on Trex 600 to mount the gyro?

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04-08-2010 10:05 PM  8 years agoPost 2
Ben-T-Spindle

rrProfessor

Central Illinois

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Since the SK360 in only a two-axis gyro I don’t see that it has anything to due with the tail. Sounds like you have a tail gyro, tail servo, or tail linkage problem.

... BTS

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04-08-2010 11:12 PM  8 years agoPost 3
denizcan

rrNovice

Ankara - Turkey

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Ok, I mean tail moves up and down.. Not sideways. Also heli bends to one side. (I think to the heavier side). In hoover, tail moves down in steps.

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04-08-2010 11:32 PM  8 years agoPost 4
ke6d

rrApprentice

San Jose, CA

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Nodding is a symptom of low headspeed.

What is your T-600 headspeed?

My Fleet: T-Rex 700e VBar, T-Rex 600e VBar, Logo 500 VBar, T-Rex 500 VBar, T-Rex 450Pro VBar

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04-08-2010 11:37 PM  8 years agoPost 5
denizcan

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Ankara - Turkey

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I am running it at 1800 and 1900 RPM..

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04-08-2010 11:41 PM  8 years agoPost 6
ke6d

rrApprentice

San Jose, CA

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Mine flies very nice at 2000 rpm. I use the basic 3d profile and it was almost "dead on"

My Fleet: T-Rex 700e VBar, T-Rex 600e VBar, Logo 500 VBar, T-Rex 500 VBar, T-Rex 450Pro VBar

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04-08-2010 11:43 PM  8 years agoPost 7
denizcan

rrNovice

Ankara - Turkey

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did you install the gyro on the same spot?

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04-08-2010 11:47 PM  8 years agoPost 8
ke6d

rrApprentice

San Jose, CA

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No, I have the SK-360 on the receiver tray. I had the Spartan gyro installed on the tailboom case already.

My Fleet: T-Rex 700e VBar, T-Rex 600e VBar, Logo 500 VBar, T-Rex 500 VBar, T-Rex 450Pro VBar

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04-08-2010 11:52 PM  8 years agoPost 9
denizcan

rrNovice

Ankara - Turkey

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Thank you. I'll first try increasing the head speed, and than moving the gyro to lower locations. Lower location might have lower vibrations though..

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04-09-2010 01:12 PM  8 years agoPost 10
denizcan

rrNovice

Ankara - Turkey

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Incresing head speed to 2000RPM helped a lot. However, I still see very small nodding. For normal flight it is not important, but for AP I care.. Is small nodding natural for Vbar?

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04-09-2010 02:06 PM  8 years agoPost 11
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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No

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

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04-09-2010 02:15 PM  8 years agoPost 12
max232

rrVeteran

Pensacola

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I have mine mounted on the the tail boom case with thin 3m adhesive tape. maybe your settings are off. if you post all the settings im sure someone could help if that is the case.

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06-10-2010 10:56 AM  8 years agoPost 13
denizcan

rrNovice

Ankara - Turkey

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Ok, I used SK720 and Skookum finally told me that SK720 has some additional computing to prevent nodding. They have plan updating 360's software.. I sold all the units and bought the old HeliCommand Rigit. What a difference for scale flight..

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