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HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsBeastX › vertical wag on the tail?
10-16-2011 10:18 PM  7 years agoPost 1
Diego

rrApprentice

Oviedo or Cartagena, Spain

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Hey guys,

What could cause a vertical wag on the tail when doing FFF or a full power climbout?

I've been reducing pot one half way to get rid of this wag during hover but it remains in the situations i mentioned. I'm starting to feel there is something else wrong and that i'm just masking it with pot.

What should i do?

By the way
It´s a trex 600 nitro pro, os 55

Thanks,

DIego

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10-16-2011 10:37 PM  7 years agoPost 2
az_heliguy

rrKey Veteran

San Tan Valley, AZ

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so the tail is bouncing up and down?

Mastercard Team Pilot :)

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10-16-2011 11:31 PM  7 years agoPost 3
cudaboy_71

rrElite Veteran

sacramento, ca, u.s.

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usually headspeed is too low. definitely a head issue and not a tail issue.

if it ain't broke, break it.

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10-16-2011 11:38 PM  7 years agoPost 4
az_heliguy

rrKey Veteran

San Tan Valley, AZ

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typically, yes, too low of a headspeed causes that tail "bobble", the 600n likes a higher headspeed. i run my 600n fbl with the microbeast at 2100-2150.

but since it is fbl, it can also be related to the mb. if turning down pot 1 reduces it while in a hover, but nowhere else, its hard to say.

what headspeed are you running?

Mastercard Team Pilot :)

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10-17-2011 12:45 AM  7 years agoPost 5
red_z06

rrProfessor

Dumont, NJ

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If it is the head speed you like, then temporarily increase the head speed about 100rpm or so to see if it goes away. If it does, your head damper may be too hard. Try one that is 10 durometer lower. If it only does sometimes regardless of the head speed, check and replace your damper. It might be worn.

www.JustinJee.com

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10-17-2011 01:12 AM  7 years agoPost 6
az_heliguy

rrKey Veteran

San Tan Valley, AZ

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yea, those tail bobbles can be more then one thing, but usually it is head speed and or dampers.

Mastercard Team Pilot :)

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10-17-2011 04:33 AM  7 years agoPost 7
lewma

rrApprentice

San Diego, CA

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I had the same thing on my 550e. Increasing the head speed cured the problem.

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10-17-2011 04:38 AM  7 years agoPost 8
red_z06

rrProfessor

Dumont, NJ

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We initially flew with 500mm blades and the red dampers on Justin's X5. But, after changing to 520mm, staying at 2700 head speed was not an option. Lowering the head speed started the wobble. Actually this occurs with FB helis as well.

So, with lowering, I had to replace the red with black stock dampers. Problem solved.

www.JustinJee.com

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10-17-2011 08:17 AM  7 years agoPost 9
nickwap

rrVeteran

Berwick-upon-Tweed, Northumberland, England

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+1 on the head speed or dampers

Nick

"Give me another one, this one's broke!"

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10-17-2011 09:03 PM  7 years agoPost 10
Diego

rrApprentice

Oviedo or Cartagena, Spain

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Sorry it took so long to respond it was one of those mondays...

The headspeed at the moment is 2050, i did not want to go higher because i´m getting a little overspeeding that i am trying to figure out.

The head is an RJX, it has no more than a gallon of use, but i did not fly it for a month, maybe the dampners got pressed into an out of round shape?

i will try and go to 2100-2150 and see what happens before taking the head apart.

Thanks

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10-17-2011 10:38 PM  7 years agoPost 11
red_z06

rrProfessor

Dumont, NJ

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600 and 2050 is plenty fast. It should not cause the low speed wobble. I would focus on the dampers or source of vibration.

www.JustinJee.com

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10-17-2011 10:43 PM  7 years agoPost 12
az_heliguy

rrKey Veteran

San Tan Valley, AZ

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yea, 2050 is plenty fast on a 600n. check your dampers and if possible, swap them out to a softer dampers.

Mastercard Team Pilot :)

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10-18-2011 06:01 AM  7 years agoPost 13
Dwntyme

rrApprentice

U.S.A.

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First off what blades are you using?
If you are using FBL blades try going into your "Parameter menu"
and to C and ajust your Pitching up compensation higher one light seting at a time until it stops.

Good luck
Malcolm

Love a Twitchy Heli.... :) and Remmington Model 700

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