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Home✈️Aircraft🚁Helicoptere-AlignOther › Head speed wobble on a TREX600 ideas anyone
01-26-2007 04:10 PM  12 years ago
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falcon

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UK

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Head speed wobble on a TREX600 ideas anyone
I am running a standard motor and pinion on TP5000s i have a good head speed but i have not checked it with a Tacho yet.
I do have a wobble for want of a better word it seems related to the head speed.
The undercarraige has a slow wobble and i think this gets worse with a increase in head speed, it is a very gentle wobble nothing like out of balance parts but i don't know if it will get better when the head has done some serious flying because its only hovered at the moment.
Any one come across this one?
www.m0kwr.com
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01-26-2007 05:03 PM  12 years ago
bparro

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indianapolis,in

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If your throttle curve is already 90 percent or above then check the balance of your blades. A bent mainshaft will also cause this.
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01-26-2007 05:32 PM  12 years ago
falcon

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UK

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The blades i have used before and this is only the second hovering session(new 600) while giving the TP5000 Lipos some exercise.www.m0kwr.com
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01-26-2007 05:33 PM  12 years ago
cranester

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Bogota, Colombia

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A missaligned paddle can also cause this.Juan Crane
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01-26-2007 05:35 PM  12 years ago
falcon

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UK

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Thank for your input cranester.
I will check em out later
www.m0kwr.com
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01-26-2007 05:37 PM  12 years ago
mikeangiulo

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Bellevue, WA - USA

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Main blades too tight? Tail blades too tight?

Are your head dampers really really cold (like you keep the chopper in a garage in winter)?

Of course more headspeed fixes this most of the time. On my 450 the head damper o-rings get old and the wobbles come back especially when I kick out of idle up. I haven't had the problem on my 600 yet.
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01-26-2007 06:34 PM  12 years ago
heli pod

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Consider your main blades. My first set were TT mains and I too had some strange wobble. One of the guys at the field recommended that I rotate the blades (meaning--flip the position of the blades on the grips). This helped about 60%. Then I decided to spend about 20 bux more for some Radix mains. SOLVED 100%. No shaking nor wobble. I also changed the landing gear from the black stock to the 3D whites. Give that a try!
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01-26-2007 07:18 PM  12 years ago
falcon

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UK

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Thanks guys a few things to consider there.
I will check it out shortly, it has been cold when flying but the heli was kept in the house so i am not to sure about the temperature affecting the dampers.I have a few sets of blades i will try a different set tomorrow.
cheers
www.m0kwr.com
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01-30-2007 06:20 PM  12 years ago
falcon

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UK

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Changed the dampers for the softer light grey ones and flew it today without a wobblewww.m0kwr.com
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01-30-2007 09:28 PM  12 years ago
hazchem88

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W.Mids UK

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check your 2 side frames are screwed together tight.
mine wobbled until i checked and tightened the screws in the frame holding the main shaft bearings
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