RunRyder RC
WATCH
 3 pages [ <<    <     1     ( 2 )     3     NEXT    >> ] 2518 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Anyone got THE answer?? before I give up for good!
04-20-2009 11:23 PM  9 years agoPost 21
Raptor Pilot

rrVeteran

Northern Ireland U.K

My Posts: All  Forum  Topic

I use 401 gyros and 9254 servos on the tail on all my helis and if one of them starts to judder the tail from side to side, not a wag like the gain being too high, after months of being perfectly normal the first thing i do is examine the gyro sticky mounting tape and i usually find it is starting to seperate into two pieces, one sticks to the gyro and the other stays stuck to the heli. Replace the gyro tape and the heli is normal again. If the gyro tape is fine then 2 or 3 clicks leaner on the main needle cures it to. Again these are what works for me but if they can help you jgheli, then thats great.

If it doesnt move and its meant too... use WD 40. If it moves and its not meant too...use duct tape!

PM  EMAIL  GALLERY  Attn:RR  Quote
04-20-2009 11:35 PM  9 years agoPost 22
The_Dave

rrVeteran

Las Vegas / Pahrump, Nevada

My Posts: All  Forum  Topic

~
The engine is your answer...that bad boy is hammering...I would look there.

Mark McAlpine - 2005 - We will never forget.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-20-2009 11:44 PM  9 years agoPost 23
Mr502go

rrApprentice

Kennesaw, GA

My Posts: All  Forum  Topic

Also ensure your boom supports are tight.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-21-2009 07:37 PM  9 years agoPost 24
jgheli

rrNovice

united kingdom

My Posts: All  Forum  Topic

What sort of distance do i need from the regulator to the servo lead and gyro? Obviously space is tight....
Weather is too bad to fly today, tomorrow looks good though.

I did take the engine out today for a clean - but also to check the fan as somebody else mentioned that might cause me the problem. There is a tiny (almost invisible) warp to the fan. Could this be it? I repeat though, the warp is less than 0.5mm.

Im guessing this isnt the issue.

Tail bearings are all smooth.

PM  EMAIL  Attn:RR  Quote
04-21-2009 07:50 PM  9 years agoPost 25
rotormonkey

rrKey Veteran

Ottawa, ON - Canada

My Posts: All  Forum  Topic

Just don't run the wires bundled up right next to one another. I'm inclined to say the fan isn't the problem.

PM  EMAIL  Attn:RR  Quote
04-21-2009 08:19 PM  9 years agoPost 26
helinelly

rrVeteran

st.helens england

My Posts: All  Forum  Topic

hi there matey
is your tracking ok............also check your clutch bearings....mine started vibes realy bad the other week it turned out to be the clutch bearings......any advice to stop the shaking is good...hope you find it regards helinelly

if it broken.....glue the bast#$d...keep flying..i tell the wife my crashes cost £20! works for me

PM  EMAIL  GALLERY  Attn:RR  Quote
04-21-2009 08:31 PM  9 years agoPost 27
mlucia

rrKey Veteran

Essex Jct., Vermont

My Posts: All  Forum  Topic

where is mounted? My had issues while mounted above the servos; moved back and problem solved;
I had the same issue with my 600np. There was a ton of rf interference mounting it on the front 2 servos. Placed in the back and all was good. This was a gy401 and 9254 as well. You can see it while on the bench actually. Lots of twitching going on

PM  EMAIL  GALLERY  Attn:RR  Quote
04-21-2009 08:43 PM  9 years agoPost 28
predatorman

rrVeteran

Falkland Islands

My Posts: All  Forum  Topic

If you have a torque tube tail drive, check the fittings within the tail gear box.

I had a bad vibe around the tail of my Predator a while back. It was one of the fittings on the drive train coming loose. It would go away if I landed and powered down...I could power back up and the vibe would go...but then come back again after I had flown a circuit.

Just a thought.

Quality takes........time!

PM  EMAIL  Attn:RR  Quote
04-21-2009 10:58 PM  9 years agoPost 29
doorman

rrProfessor

Sherwood, Arkansas

My Posts: All  Forum  Topic

You may want to check to confirm that the carrier bearings are in the proper position in the tail boom so that you are not getting a "whip" in the drive shaft...
Just a thought...
Good luck

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

PM  EMAIL  GALLERY  Attn:RR  Quote
04-21-2009 11:24 PM  9 years agoPost 30
heliraptor10

rrKey Veteran

kokomo, in-US

My Posts: All  Forum  Topic

If it is a gyro mounting issue you might consider a foam cradle for the gyro.

I made one so that zip ties hold the cradle and then the cradle has a separate tie system to hold the gyro.

There is no way for vibration to hit my gyro without having to go through foam first.

Have it set up like this on my 450 and my Raptor e550

Goblin! where have you been all my life?
RC helis, the original fidget spinners

PM  EMAIL  GALLERY  Attn:RR  Quote
04-21-2009 11:51 PM  9 years agoPost 31
Gyronut

rrProfessor

Martinsville In.

My Posts: All  Forum  Topic

Had the same issue with my new 600 this past weekend and leaning the mtr cured it.

Rick

PM  EMAIL  GALLERY  Attn:RR  Quote
04-21-2009 11:57 PM  9 years agoPost 32
RaptorMan23

rrKey Veteran

Sioux City, IA

My Posts: All  Forum  Topic

I know exactly what your fighting, Im about 99% sure. PM sent, Ill have to call you or somthing becuase Im not writing 2 pages

It has to do with "mechanical gain", not gyro gain, Ill explain on the phone

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-21-2009 11:58 PM  9 years agoPost 33
GREYEAGLE

rrElite Veteran

Flat Land's

My Posts: All  Forum  Topic

Check your switch
Tough one for me to admit but I've done it ! Make sure 401 dip switch is set to DS. !!! Same symtom ! I guess I must of bumped it when I was in a hurry

greyeagle

PM  EMAIL  GALLERY  Attn:RR  Quote
04-22-2009 12:00 AM  9 years agoPost 34
GREYEAGLE

rrElite Veteran

Flat Land's

My Posts: All  Forum  Topic

Just squirt over the white paper ! too him
Don't tell me you erased it !!! Dang that's got to got in the Black Book ! the other one with the 3 RIng's

greyeagle

PM  EMAIL  GALLERY  Attn:RR  Quote
04-22-2009 12:01 AM  9 years agoPost 35
heliraptor10

rrKey Veteran

kokomo, in-US

My Posts: All  Forum  Topic

Ain't it wonderful?

One problem,
and hundreds of different possibilities.

Do helicopter tails run on Windows?

Goblin! where have you been all my life?
RC helis, the original fidget spinners

PM  EMAIL  GALLERY  Attn:RR  Quote
04-22-2009 12:22 AM  9 years agoPost 36
Yug

rrMaster

UK. Herts

My Posts: All  Forum  Topic

Lots of reasons why you may be experiencing this problem. Could be a system balance issue or a physical issue when under load.
Perhaps dodgy pot on the 9254 which is effected by vibes
Gyro mounting - try Zeal
Engine running too rich
Tail boom support resonance - try a simple brace
TR pushrod force overpowering the servo - check TR dynamic balance
Check for binding of pitch fork under load
What effect does different gains have ?
Try reducing mechanical gain by moving in a hole
Consider playing with chinese weights to lower the servo loads

Vegetable rights and Peace

PM  EMAIL  GALLERY  Attn:RR  Quote
04-22-2009 12:23 AM  9 years agoPost 37
RaptorMan23

rrKey Veteran

Sioux City, IA

My Posts: All  Forum  Topic

Try reducing mechanical gain by moving in a hole
Thats what I was talking about, I just wanted to explain to him "why" that is mechanical gain and what effect it has on his gyro

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-22-2009 12:38 AM  9 years agoPost 38
holzback

rrKey Veteran

noblesville IN United States

My Posts: All  Forum  Topic

in a hover watch your tail, and when it moves take note to any change in the sound of the engine.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-22-2009 08:23 PM  9 years agoPost 39
jgheli

rrNovice

united kingdom

My Posts: All  Forum  Topic

wow, loads of answers.
It seems that leaning the engine might be the cause. Mainly as I have tried most else. Too windy again to try!!
i will come back when i have tried some of your great suggestions.
Thank you all for your help.

PM  EMAIL  Attn:RR  Quote
04-23-2009 12:54 AM  9 years agoPost 40
ch-47c

rrElite Veteran

san jose, ca

My Posts: All  Forum  Topic

Motor 4-stroking will pulse the drivetrain out to the blades and the gyro will attempt to correct it. Give up for good? Never.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 3 pages [ <<    <     1     ( 2 )     3     NEXT    >> ] 2518 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Anyone got THE answer?? before I give up for good!
 Print TOPIC  Make Suggestion 

 15  Topic Subscribe

Wednesday, October 17 - 1:42 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online