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e-Century Hummingbird - Swift > Sticky Blade Grip Issues with new Swift 16 kit
 
 
frisellaw
New Heliman
Location: St. Louis MO USA

Just started a build on a Swift 16 and have some sticking issues with one of the stock blade grips. I put it together correctly, took it apart several times and checked for loctite leaking into the bearings, etc... When I tighten the screw into the feathering shaft all the way, it binds and is sticky. When I switch the two blade grips from one side to the other, the one that is on one side of the feathering spindle is still sticky. Could this be an issue with the spindle itself? Anyone heard of this problem?
04-21-2008 04:00 PM
 
 
centuryman
Senior Heliman
Location: deerriver,mn usa

Where did you put the bearing shim?It should go between the thrust bearing and the radial bearing.also the thrust bearing races are 2 different sizes on the inside the small hole goes out .
04-22-2008 02:37 AM
 
 
frisellaw
New Heliman
Location: St. Louis MO USA

The bearings are installed correctly, I took them apart twice and checked, also for loctite that had gotten out, etc... One of the grips is perfect, the other is a bit tight. I called Century and they said that a little tightness is normal and will shake out with spool up, but I am a bit unsure. They also said it might be a badly made rubber shim and to cut off any excess that sticks out from the head, which I haven't done yet. We'll see. Thanks for the reply.
04-22-2008 07:04 PM
 
 
JustPlaneChris
Heliman
Location: Austin,TX - USA

I had sticky grips after switching to the CNC hub, and trimming the damper(s) is exactly what I did to fix it. I didn't have that problem with the plastic head though. As for their "it'll shake out" suggestion? Umm...... Tightness is NOT normal. The grips should rotate smooth as silk with the bolts snugged up.

-Chris
04-22-2008 07:33 PM
HOMEPAGE  
 
 
Al Austria
Key Veteran
Location: Gainesville, FL

The grips on the all metal head on my 620SE were tight for the first couple flights. Flies just fine, no trimming neccesary. Check out the vid here:

http://www.runryder.com/helicopter/t423976p1/

Always remember you're unique, just like everyone else.
04-22-2008 08:12 PM
HOMEPAGE  
 
 
oldfart
Elite Veteran
Location: Vancouver, Canada

Looks like you were having a lot of fun with it Al

Definitely some Perma-Grin happening in that video....two thumbs up.
04-22-2008 09:42 PM
 
 
JustPlaneChris
Heliman
Location: Austin,TX - USA

Maybe I'm expecting too much from my builds? I don't tolerate anything that doesn't rotate smoothly, and work on it until it does.

-Chris
04-22-2008 10:31 PM
HOMEPAGE  
 
 
centuryman
Senior Heliman
Location: deerriver,mn usa

Almost all my century's have had tight grips untill after a few flights and then they settled in nicely.
04-27-2008 03:15 AM
 
 
Cloud Cruiser
New Heliman
Location: Georgia

I was having the same trouble, Seems as if a batch of feathering shafts are defective from the factory. On mine, you can see were the teeth of the lathe crushed and distorted the turned down end of the shaft. I talked to Joe @ Heli-World and he sent me a replacement. Great service. I know of three different guys having the same problem.
Robert
04-27-2008 04:40 AM
 
 
jamesppp
New Heliman
Location: carrollton georgia usa

Even if most of the time it will free up after some use, I wouldnt want to risk it.
05-02-2008 03:39 PM
 
 
centuryman
Senior Heliman
Location: deerriver,mn usa

all of my feathering shafts have looked perfect.Once you spool it up once the centrifigal force pulls everything into place and they are free as can be.I would rather they were tight and broke in to be perfect, then like some other makes that are loose out of the gate and only get looser,that's what causes vibrations.
05-03-2008 01:15 AM
 
 
jamesppp
New Heliman
Location: carrollton georgia usa

Have you received a kit with the alumunum plate and fins yet?
05-03-2008 01:30 AM
 
 
centuryman
Senior Heliman
Location: deerriver,mn usa

my last kit has those. man what a rip off.the made it sound like something cool to go with the lower price.On my first swift 16 all those parts were carbon.
05-03-2008 01:34 AM
 
 
jamesppp
New Heliman
Location: carrollton georgia usa

Was the aluminum bottom plate longer than your carbon fiber one?
05-03-2008 01:52 AM
 
 
centuryman
Senior Heliman
Location: deerriver,mn usa

Yes . it is the same excact size as my 620 plate. only the 620 plate is carbon.and it is about 40mm longer then the old swift 16 carbon plate.
05-03-2008 02:02 AM
 
 
twinbladeHeliman - Location: Hartsville, SC -
Wow I just had the same problem and posted what happened to me in another thread. One side of the threaded part of the spindle is not centered! It took me a long time to figure this out. If you look close there is probably a small ding where the transition is going to the smaller diameter. Spin the spindle in the blade grip and you can see how far off center it is. The vibration is awful and can not be flown like this without causing damage to the heli.

05-11-2008 03:04 PM
 
 
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e-Century Hummingbird - Swift > Sticky Blade Grip Issues with new Swift 16 kit
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