RunRyder RC
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1570 views POST REPLY
HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › main blade axle too short.
04-28-2013 06:36 AM  5 years agoPost 1
Santiago P

rrProfessor

South West, Ohio

My Posts: All  Forum  Topic

Almost finishing the R30

Took the head apart, had to loctite all its bolts and screws, grease the thrust bearings.

In the process of putting it back together, It seems the axle is about 1mm too short.
As a tighten the two axle bolts the head jams and it wont rotate.

I am bummed out having to order an axle to finish the heli.

or
Is there a trick to the head bearing stack?

S

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-28-2013 12:27 PM  5 years agoPost 2
al_voisine

rrNovice

Grand Falls, New Brunswick, Canada

My Posts: All  Forum  Topic

Have you possibly reversed the order of the thrust bearings??

PM  EMAIL  GALLERY  Attn:RR  Quote
04-28-2013 04:02 PM  5 years agoPost 3
Santiago P

rrProfessor

South West, Ohio

My Posts: All  Forum  Topic

Enlight me please.

Is the large ID thrust plate inside or out?

Santiago

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-28-2013 05:10 PM  5 years agoPost 4
James Kovach

rrKey Veteran

canton, oh - US

My Posts: All  Forum  Topic

Did you install all the shims. They do not all need to be installed

*disclaimer: These are my opinions. Agree or disagree, Your Call :)
Let'r Rip Tator Chip

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-28-2013 08:21 PM  5 years agoPost 5
Santiago P

rrProfessor

South West, Ohio

My Posts: All  Forum  Topic

Even without any shims, the moment one start to set the spindle screws, the grips become solid, they wont rotate.

All I can think is this spindle is out of length tolerance, or there is something wrong internaly with the grips.

Can someone tell me what length dimensions the spindle should be?

S

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-28-2013 08:28 PM  5 years agoPost 6
adamsz06

rrVeteran

Geilenkirchen Germany

My Posts: All  Forum  Topic

Are the grip bearings fully seated and square with the pockets?

R.I.P. Roman

PM  EMAIL  Attn:RR  Quote
04-28-2013 09:01 PM  5 years agoPost 7
Santiago P

rrProfessor

South West, Ohio

My Posts: All  Forum  Topic

Grip bearings are factory installed, and yes they are seated.

S

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-28-2013 09:10 PM  5 years agoPost 8
Santiago P

rrProfessor

South West, Ohio

My Posts: All  Forum  Topic

Here's a picture for you:

If I bottom out the grips against the main hub, basically no dampeners, no shims, the spindle still comes short 1mm below the bearing stack.

S

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-29-2013 03:09 AM  5 years agoPost 9
James Kovach

rrKey Veteran

canton, oh - US

My Posts: All  Forum  Topic

Sounds like they put the wrong spindle in your kit. Sorry, but you will need to get ahold of Heli-World/Century. They will send you the right spindle.

*disclaimer: These are my opinions. Agree or disagree, Your Call :)
Let'r Rip Tator Chip

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-29-2013 11:30 AM  5 years agoPost 10
rapidity

rrVeteran

ohio

My Posts: All  Forum  Topic

If these are the plastic grips, I ran into the same problem on my multihead. They say you need a different shim package. I said screw it and got the metal grips. I think they have a problem with their plastic.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-29-2013 02:34 PM  5 years agoPost 11
Santiago P

rrProfessor

South West, Ohio

My Posts: All  Forum  Topic

They are aluminum grips.

I did a work around after staring at all the shims and the spindle lenght.
Out came the 2 shim washers.
I removed the 1mm spacers and placed the large 0.12mm washer in their place, they seem to work in trasfering the grip load from the radial bearing oute case to the thrust bearing.

The small washers were still too thick to take the small gap, so I made two 0.05mm copper shims to put between the dampener and the grip.
That does a perfect stack with just a smidgen of preload on the grip, and maintaining smooth rotation.

Thanks Bob and James for your replies.
Look fwd to get this hog in the air in the next two days.
WAS Really starting to like this kit.

Santiago

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-14-2013 06:24 AM  5 years agoPost 12
thedrill

rrNovice

Reno, NV, U.S.A.

My Posts: All  Forum  Topic

I ran into this also. And yes I found out of three shafts I had, they were 3 different lengths. Go figure. Just used the longest one and it worked. Also had one bent right out of the package. How does that happen??

Vote the bastards out!!All of em T-rex 450Pro, T-rex 500 Radical G20

PM  EMAIL  Attn:RR  Quote
06-25-2013 04:34 AM  5 years agoPost 13
RM3

rrElite Veteran

Killeen, Texas - USA

My Posts: All  Forum  Topic

How does that happen??
the same way that they don't sell a feathering shaft for the all metal FBL head for the G20...the ends on it are for the smaller set of axial bearings, ordered a feathering shaft and it turns out to have the thicker ends that use the P90 size head axial bearings...BS!

Centurys got thier heads up thier ....

showing a preference will only get you into trouble, 90% of everything is crap...

PM  EMAIL  GALLERY  Attn:RR  Quote
06-27-2013 02:32 AM  5 years agoPost 14
Gearhead

rrMaster

Vt

My Posts: All  Forum  Topic

I just research this for you guys, this is what I found,

Part# HW6180BS 97mm new FBL metal grips
Part# HW6180AS 94mm plastic and older metal grips
Part# HW6180A 94mm (black) plastic grips

Jim
Buzz Buzz Buzz

PM  EMAIL  GALLERY  Attn:RR  Quote
06-27-2013 03:01 AM  5 years agoPost 15
RM3

rrElite Veteran

Killeen, Texas - USA

My Posts: All  Forum  Topic

I ordered the *AS part # as it was in the G20s list of spare parts...it did not fit the FBL for the G20,

6180BS uses all sorts of shims to get it to fit...unlike what I had before, just the standard aluminum spacer between the dampener and the grip bearing.

I ended up just putting the old feathering shaft on the lathe and spending 30 minutes getting it strait again.

On that note, were in the world are the manuals for the G20s FBL metal head?

showing a preference will only get you into trouble, 90% of everything is crap...

PM  EMAIL  GALLERY  Attn:RR  Quote
07-09-2013 03:46 AM  5 years agoPost 16
turboomni

rrProfessor

East of the Equator

My Posts: All  Forum  Topic

I ordered a Hobby;;;King crap DFC head to go FBL on my lowly OLD Trex 450 V2,,the same thing happened . I tightened the loose spindal screws and she locked up,,,WTF??? Thank god I had my hobby shop guru with all shims available in house to dissect the piece of crap and make it work. Many times you need alot of different shims to make these things work. I went to an Align DFC head and everything worked as advertised. I threw the hobby king crap in the garbage. I do not know of Century having this problem personally but it sure rings a bell. Sorry about your problems,,,,they are maddening. Many people have used different heads like from ALIGN on Century's I believe with great success

Setup is everything, All my heli's can fly far better than I can pilot them

PM  EMAIL  GALLERY  Attn:RR  Quote
07-09-2013 04:01 AM  5 years agoPost 17
JKos

rrProfessor

Redondo Beach, CA

My Posts: All  Forum  Topic

In this day and age of precision machining it simply astounds me some of the issues we have.

- John

RR rules!

PM  EMAIL  GALLERY  Attn:RR  Quote
07-09-2013 04:34 AM  5 years agoPost 18
Gearhead

rrMaster

Vt

My Posts: All  Forum  Topic

wow,
just like Hirobo, MA and Robbe and JR as well as other brands that make differnt spindles for different heads

Jim
Buzz Buzz Buzz

PM  EMAIL  GALLERY  Attn:RR  Quote
07-09-2013 04:59 AM  5 years agoPost 19
turboomni

rrProfessor

East of the Equator

My Posts: All  Forum  Topic

1mm difference,,,CNC machines WTF?? What other model in their lineup would require a 1MM difference in length,,I Doubt this very much,,some guy in asia punched in the wrong numbers,,,or his CNC machine is due for a checkup,,or he got bad information,,,like my crap Hobby King DFC head,,,which is total junk...

Setup is everything, All my heli's can fly far better than I can pilot them

PM  EMAIL  GALLERY  Attn:RR  Quote
07-09-2013 06:09 AM  5 years agoPost 20
Santiago P

rrProfessor

South West, Ohio

My Posts: All  Forum  Topic

What does the HK DFC junk has to do with the topic?

We are talking about the quality control in many G30 and G20 Century heads is bad as many folks building new heads are discovering spindles with wrong lenghts.

And yes, 1mm too short does result in jamming the bearing stack in a 700 size machine.

Never had this happened in a Hirobo, MA, JR, or Schluter.

S

Team Minicopter - PeakAircraft.com
bavarianDEMON- Team Kontronik - Scorpion Motors-

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1570 views POST REPLY
HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › main blade axle too short.
 Print TOPIC  Make Suggestion 

 7  Topic Subscribe

Tuesday, October 23 - 2:50 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