deepak kirpalan Heliman Location: Trinidad and Tobago
Hi Folks I've been doing some flying lately. I now have about 212 flights on my 600 3d fly bar version. Doing simple rolls flips stall turns etc. just the basic sttuff. I have some vibes showing up on the vertical fin and on the skids. The tracking is dead on, the fly bar is centered all the nuts and bolts are tight. Does any one have any ideas on what one should look so that I can eliminate the vibration? Kindly let me know Thanks D
07-03-2008 02:41 PM
Blackrat Heliman Location: Peterborough UK
with nothing bent or broken i would be looking at a worn bearing, perhaps the thrust bearing in the tail grips ? check for 'notchiness'
07-03-2008 04:16 PM
Terrabit Senior Heliman Location: Seattle, WA - USA
I would recomend the following:
check all bearings including the motor check tail shaft/rotors/hub assembly check belt tension check main gear for wobble look for any slop in your servos or linkages
After 212 flights and assuming no crashes or hard landings, I suspect your problem is most likely a bad bearing. You may have one spining or moving in its recess. Don't forget the belt tensioner bearings.
Good luck!
07-03-2008 05:24 PM
deepak kirpalan Heliman Location: Trinidad and Tobago
tail rotor vibesWell, I did some feeling around the tail rotor and found there was a lot of play in the blade grip where it screwed onto the blade holder. Switched out all bearings and now everything is tight.Will fly tomorrow. Let you know how it works out. Thanks deepak
07-06-2008 03:15 AM
deepak kirpalan Heliman Location: Trinidad and Tobago
tail rotor changedFolks Changed out parts but still have vibration. Any ideas. Let me know please Thanks d
07-07-2008 11:59 PM
helicraze Key Veteran Location: Victoria - Australia
I had a problem on my E550, turns out the main gear had been worn funny causing vibs, took me 3 months to find it. Change the main gear maybe???
07-08-2008 01:54 AM
deepak kirpalan Heliman Location: Trinidad and Tobago
re main gearJust stripped one on friday last Brand new gear on. Any other thoughts? D
07-08-2008 02:03 AM
helicraze Key Veteran Location: Victoria - Australia
Spindle straight? Could be bent from hard landing? Not running crap rotors? Could have thrown a weight. Did you increase of decrease the RPM to see if it comes or goes?
07-08-2008 02:05 AM
deepak kirpalan Heliman Location: Trinidad and Tobago
re spindleNever took it out of the head and rolled on a piece of glass. Vblades track properly and blade grips roll smooth to the touch. Not exactly sure what you mean by throwing a weight or increase od decrease rpm to see if it comes or goes? D
07-08-2008 02:10 AM
laughingstill Key Veteran Location: Gainesville, Fl, USA
The weight in the blades could have shifted. Increase/decrease the throttle curve to see if the problem happens only at a certain RPM....Ron
3DMP-E, Logo 6003D, Logo103D Carbon and Trex 450se Flyin Firefighter
07-08-2008 02:18 AM
deepak kirpalan Heliman Location: Trinidad and Tobago
weight in bladeHi Ron Long time no chat. Dont understand what you mean. I'm using v blades. How would the weight shift? D
07-08-2008 02:21 AM
laughingstill Key Veteran Location: Gainesville, Fl, USA
Yeah, long time Where ya been? If you were using woodies. Weights shift sometimes I meant. Sorry for the confusion....Ron
3DMP-E, Logo 6003D, Logo103D Carbon and Trex 450se Flyin Firefighter
07-08-2008 02:30 AM
deepak kirpalan Heliman Location: Trinidad and Tobago
Still hereRon, Just trying to figure how to get rid of the vibes. Funny thing when its on the ground it seems not to vibrate as much ? Any ideas? D
07-08-2008 02:39 AM
KC Elite Veteran Location: WA
deepak, I had a similar vibe that was easy to fix.
tracking was fine, everything looked right, except in climbouts where I figured out it was the blades weren't rotating on axis.
all of the m0915 grips I have tried are tapered and very few blades are a perfect fit inside them except a few of the Mikado blades
Maybe worn out damper rubbers in the head. Have they been changed at all since the first flight?
Regards
Fergus
07-08-2008 09:08 AM
deepak kirpalan Heliman Location: Trinidad and Tobago
re vibesHey, Thanks for the responses. I have not changed the dampers and the head is not as rigid as it once was. Perhaps I'd give it a try. Thanks Deepak
07-08-2008 01:21 PM
deepak kirpalan Heliman Location: Trinidad and Tobago
tail rotor vibesHi Folks Checked the main rotor head today. Sheesh, found a destroyed thrust bearing. The balls of the bearing wer all over the place. There was a lot of play in the head as well. Changed the thrust bearings and added the k&s dampers. Will fly again tomorrow and let you know how it turns out. Thanks for the advice guys D
07-09-2008 12:56 AM
helicraze Key Veteran Location: Victoria - Australia
sounds like it would be the problem
07-09-2008 01:41 AM
KC Elite Veteran Location: WA
K&S or K&B??? I still cross them up but I figure you mean K&B. If you are going to use those, use the thin shim from the Mikado 3092 dampener set between the dampener and the grip...the other shims (i.e. 2755, 2756) are too thick and will squeeze the thrust bbs.
Where ya been? If you were using woodies. Weights shift sometimes I meant. Sorry for the confusion....Ron
