redbaron9898

My Feedback: (2)

Whats going on i can not figure out what this shake is...watch at about :18 seconds it starts shaking....whats wrong blades tracked perfect

http://www.youtube.com/watch?v=nHw-VRNWfok

RC David

After watching I don't know either. The only thing I could think of is you were flying too low and too close to the wall (or other large objects) which created "ground effect" but something tells me that's not it.

I'd re-check your cyclic servos and make sure the rear servo isn't going bad. It looked like you were rapidly moving your cyclic stick forward and back (which I know you were not)

Dave

Ybenjulkay2x

check your fly bar it could be bent, happen to me before, same on your video, also check lenght on each side.

redbaron9898

My Feedback: (2)

i don't really know how to make the flybar perfectly centered any tips?

Druss

digital calipers. then use your pitch gauge on the paddles to get 0 pitch.

check shafts and balance blades.

Check your tail set up too.

bad400

bad gyro?

redbaron9898

My Feedback: (2)

not a gyro problem....unbalanced blades?

bad400

thats to much movement for the blades i would think anyway.have you crasched this heli. it could be a bent mainshaft or feathering shaft that only shows up under slower head speeds

redbaron9898

My Feedback: (2)

i have crashed it before. the main shaft is brand new....i think ill try the feathering shaft...and balance the blades. when im spooling it up it shakes/vibrates briefley

Bugzilla

A little vibration on spool up is normal, as long as it goes away when it speeds up a little more.

Ybenjulkay2x

how about the tail shaft? you mention it crashed

DriveWRX

I also posted this in your other [link=http://tinyurl.com/7zydwy]thread[/link].

That's a classic symptom of low head speed.

What motor are you using?
What batteries?

Try using a bigger pinion to bring up the head speed.
Are your batteries old? Low C rating? Try a new battery with a 25C rating. A good battery will help considerably.

BTW, I like your canopy. I may have to copy it...

redbaron9898

My Feedback: (2)

ybenjulkay2x- there is a small dent in the tail boom from the blade hitting hit but its still straight.

DriveWRX- 3550 stock motor
20c 1250mah battery
13t pinion (i have a 15t too) i did have my throttle curves a little low 0..40..50..60..70 normal

DriveWRX

OK. Your throttle curve is the main cause of the shakes. It is low. Try something like 0-50-60-85-85
Also your battery is a little small for this size heli. It may not be able to put out enough power.

So the combo of low throttle and small battery = shakes.
When you up the throttle curve, watch your battery. It's already working hard and it will have to put out more power to spin the head faster, so it may heat up too much. Heat kills batteries. 160F is the max, anything above that and the battery is cooked. If you have an [link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXEMG5&P=ML]IR thermometer[/link], watch those temps!

Try a 25C 2200mAh. You'll be amazed at the difference.

Give it a try and let us know how it works out.
Hope this helps!

redbaron9898

My Feedback: (2)

yeah i was always kinda worried about that battery When i bought the heli (barely Used) i got a free battery pack with it. I am glad i am actually making progress though...thanks guys\
ybenjulkay2x- feel free to copy my canopy...i used tamiya paints royal blue and black

ArrowNaughtic

That up and down tail bobbing is a classic symptom of the blade grips being too tight. Ask me how I know.....heh. tracking is right on the money....don't go tossing good money at a non issue. I usually tighten my grips and then back them off a half turn so they rotate freely thru out thier range of movement without moving away from the rotor head. Give it a try before you get too involved........sometimes the simplest fix is the right one.


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