RunRyder RC
 3  Topic Subscribe
WATCH
 1 page 1082 views
Scorpion Power Scorpion Power
Helicopter
e-
Elec-Helicopters New or Limited Activity
Ikarus › Balanced the TR blades and still get vibrations...​(eco 8)
08-11-2007 07:08 PM  10 years agoPost 1
beefcake

rrApprentice

Racine,WI

My Posts: All  Forum  Topic

My TR blades are balanced real nice like, but I still get a "buzz" in the tail. Enough to see on the fin. How have you successfully eliminated this type of vibration????

-CaKe

PM  EMAIL  GALLERY  Attn:RR  Quote
08-11-2007 10:33 PM  10 years agoPost 2
tahustvedt

rrNovice

Troms, Norway

My Posts: All  Forum  Topic

Your tail rotor shaft may be slightly bent.

-I got wheels... with clickety-clackers-

PM  EMAIL  Attn:RR  Quote
08-12-2007 08:01 AM  10 years agoPost 3
DogWood

rrApprentice

Bend, OR. USA

My Posts: All  Forum  Topic

Nice setup there Willy, are all those parts "drop in"?

what kind of blades do you run?

PM  EMAIL  Attn:RR  Quote
08-12-2007 03:29 PM  10 years agoPost 4
beefcake

rrApprentice

Racine,WI

My Posts: All  Forum  Topic

I ran it with just the tail slider attached, and no vibration, so it has got to be the blades and the hub. What I understand to be the hub is what the TR blade grips screw into.

3 questions:

1) Even with the blade grips screwed all the way into the aluminum hub, I get a little lateral play. Like maybe the bearings are oversized? Is this normal??

2) On the slider control, the part where you screw the ball links to does not seem to be square. If this is the case am I inducing vibration here at this point? I have tried a 2nd one of those plastic pieces to see if I could get is more square, but have had limited success in threading it on.

3) What method do you use to balance the TR?

thanks
-CaKe

PM  EMAIL  GALLERY  Attn:RR  Quote
08-13-2007 01:59 AM  10 years agoPost 5
Rob_T

rrElite Veteran

..

My Posts: All  Forum  Topic

Balancing T/R

Make absolutely sure your T/R shaft is straight. Even the slightest bend will cause vibration (which goes away when you take the weight of the end of the shaft, fooling you into thinking it's the T/R blades. Yes, been there and done that )

If the shaft is absolutely straight, then the only way to balance T/R blades I know is trial & error. Put some tape on one blade and see if it's better or worse. If it's worse, try the other blade. Then try more or less tape until you find the amount that gives the smoothest running.

1) Normal IMO. Centrifugal force helps take out some play while running anyway.

2)Not sure I'm thinking about the right part, but remember the spacing between the balls will vary with T/R pitch.

3) See above.

PM  EMAIL  Attn:RR  Quote
08-13-2007 03:39 PM  10 years agoPost 6
tahustvedt

rrNovice

Troms, Norway

My Posts: All  Forum  Topic

If you are 100% sure the shaft is straight...

I got vibes when I switched to stiffer blade grips and bolts. My soluton was to brace the tail gearbox with aluminium doublers. There are pictures in my thread a little bit below this thread on the forum. With the doublers it's super smooth.

-I got wheels... with clickety-clackers-

PM  EMAIL  Attn:RR  Quote
WATCH
 1 page 1082 views
Scorpion Power Scorpion Power
Helicopter
e-
Elec-Helicopters New or Limited Activity
Ikarus › Balanced the TR blades and still get vibrations...​(eco 8)
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Friday, November 24 - 2:56 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online