RunRyder RC
WATCH
 1 page 1013 views Post Reply
Home✈️Aircraft🚁Helicoptere-Elec-Helicopters New or Limited ActivityBeam › How much vibration is normal?
09-16-2009 06:06 AM  11 years ago
Topic Vote0Post 1
MtnMac

rrNovice

Roseville, CA, USA

MyPosts All Forum Topic
How much vibration is normal?
The Beam is my first 450. Still sorting out setup issues. Tonight I removed the main blades and spun it up. Starts smoothly, passes through a rough patch, then smooths out at about 40% headspeed and stays smooth — barely any vibration, just a faint buzz in the tail.

As it spins down, it passes again through the rough patch where it gets growly sounding, I'd guess around the main gear. In that range, the tail gets funky, too, kind of wagging (I have it sitting on a turntable to observe this). Below the growly zone, it smooths out and comes to a stop.

What parts cause vibration, and how much is acceptable? My guess is that the growl is from a harmonic resonance where several different vibes get together, then separate as the headspeed changes, which changes the frequencies. But what's vibrating? All my shafts and tail are straight, everything's oiled, all the parts move freely including the belt spindles. And you know the vibes aren't because of cheap parts.

Where should I be looking?

Thanks!
Skids
SHARE  PM  EMAIL  HOMEPAGE  Attn:RR  Quote
10-05-2009 03:14 AM  11 years ago
rocco.sj

rrVeteran

California,

MyPosts All Forum Topic
check your pinion gear and make sure its not too tight.also check your main blades,make sure its balanced.if your running new carbon blades then you should be fine on that issue,but check the main gears also.sometimes when the main gear is kind of warp,or slightly mis-deformed it can cause that noise your hearing.i usually dis-assemble my helis after 20 flights of 3D.JR Americas
Evo Power Battery
Radio Frequency RC
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1013 views Post Reply
Home✈️Aircraft🚁Helicoptere-Elec-Helicopters New or Limited ActivityBeam › How much vibration is normal?
Print TOPIC

 1  Topic Subscribe

Friday, January 22 - 5:50 am - Copyright © 2000-2021 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online