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450 Class Electric Helicopters 450 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 01-30-2009, 05:56 PM   #1
Slufoot
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Exclamation New dampers

new dampers Now i have a bad head shake at low head speed ????????
i changed the orings for the 1 pice dampers

i thought maybe the main shaft bearings was bad but i changed them today and still the same shake help please when i go to a higher head speed it stops shaking
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Old 01-30-2009, 05:59 PM   #2
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what about the blades?
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Old 01-30-2009, 06:22 PM   #3
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NEW BLADS and flew good with the blades i changed the dampers and now shake i don't think its the blades i have carbon blades this helie has been babied never even hit the ground hard just figure 8s and hovering
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Old 01-30-2009, 06:25 PM   #4
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Not sure but can this be caused by not enough lube on the dampers? Does it shake after you have spooled up to a higher headspeed and come back to a low headspeed (idle-up back to normal curve lets say) or only while spooling up?
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Old 01-30-2009, 06:33 PM   #5
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it shakes after its spooled up and hover for a wile or when i come down from flight mode 2 or 3
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Old 01-30-2009, 06:35 PM   #6
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Which 1 piece dampeners do you have?

Very stiff dampeners are made for high HS and I think they do wobble at low HS.
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Old 01-30-2009, 07:20 PM   #7
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Put some lube on the dampers and it may help, but stiff dampers can cause that at low headspeeds. I run Trueblood dampers on mine and the heli does shake some on spool up. I only fly in idle up now and am running a Scorpion -8 motor so never notice it after I hit idle up.
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Old 01-30-2009, 08:08 PM   #8
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i am using these http://www.helidirect.com/product_in...oducts_id=4678 hope the link is working
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Old 01-30-2009, 08:12 PM   #9
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i will put the 325 woodys on tomaroe and see my helie fly so good with the oring dampers maby i should go back with them
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Old 01-30-2009, 11:37 PM   #10
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You DO know those dampers are for the V2 ONLY, right?
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Old 01-31-2009, 06:49 PM   #11
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Angry

Yes i have a v2
OK so to day i changed the blades back to the 325 pro woodies
it still shakes like hell but i have learned that the it only starts to shake when i push and pull the elevator making the nose go up and down it starts shaking ... if i jump up to a difrent flight mode it will quit shaking
I have cked the linkage i have went over every thing looks good
new main shaft bearings new blades lubed the dampers ...
maby a servo is going bad HELP
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Old 01-31-2009, 07:24 PM   #12
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its gonna be a long night trying to figure this out
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Old 01-31-2009, 07:30 PM   #13
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Do you still have the old dampers? If so, put them back in and see if it still shakes. The dampers may of may not be your problem, but if they are the only things you changed prior to the problem showing up, might as well rule them out.
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Old 01-31-2009, 07:45 PM   #14
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i will change the dampers back tonight its the only thing i changed i dont understand how the stiffer dampers would cause this
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Old 01-31-2009, 07:49 PM   #15
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I know it seem strange, but stiff dampers can cause issues at lower head speeds. I clipped this from the page at Readyheli for the Trueblood super hard dampers.

**These dampeners are intended for head speeds of 2700 RPM or greater.
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Old 01-31-2009, 07:50 PM   #16
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swapping them right now
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Old 01-31-2009, 07:53 PM   #17
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make sure your main blades are not too tight also check your main shaft feathering spindle and main head block for being truly straight if that fails try another set of main blades also have you balanced your blades checked tracking

hope this helps
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Old 01-31-2009, 07:57 PM   #18
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is the tracking ok with the new dampners?
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Old 01-31-2009, 08:03 PM   #19
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all this stuff is new .Maby the blades is to tite , but i have ruled out the blades being out of balance i have 2 sets both sets do the same .... you haft to consider that it only starts shaking when i jerk the nose up and down like flying foward and pulling the nose up for backward flying it shakes so bad that its just a mater of time befor it slings the helie a part
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Old 01-31-2009, 08:04 PM   #20
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tracking is perfect
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450 Class Electric Helicopters 450 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.

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