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Home✈️Aircraft🚁HelicopterAlignOther › One-Way Bearing Issue Count
08-01-2007 11:24 PM  13 years ago
RobRoy

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Huntsville, Alabama

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Usually ATF, but was at the field and all I had with me was the little grease packed that came with the rex.Ignorance is curable, stupidity is for life.
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08-02-2007 12:49 AM  13 years ago
Wa11banger

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Huntsville, Al

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#18 Locked up twice somewhere in the early 10 or so flights.. Unlocked by brute force both times.. First time it was removed from the airframe and inspected second time it was unlocked as it sat in the airframe. Have not had a problems since and there are so many flights on this bird I doubt she will do it again.
No cleaning, no ATF, nothing but unlocked and reflown

Rick
Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team
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08-02-2007 01:57 AM  13 years ago
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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There are currently 137 Trex Nitros in the Counts post.

So far we have 18 failed one-way bearings, for a failure rate of 18/137 = 13%!

...so far

That is an excessive failure rate. For 1000 units, 130 would be defective.

For comparisons sake, a 6 sigma company would expect 3 failures for 1,000,000 units. I know that's a stretch, but it is a comparison nonetheless.
Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know
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08-02-2007 02:20 AM  13 years ago
Wa11banger

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Huntsville, Al

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is it failed or is it not dear rocko.. Mine is not failed it had two faults.. Nothing more than having to reboot your system after a good gaming session I for one do not consider mine failed.. as it was not replaced nor cleaned, nor anything, just unwedged and flown again..

A few others here were reinstalled as well.. A failure is my book is beyond fixing, oiling, lubing, etc.

Just my .02
Rick
Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team
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08-02-2007 02:44 AM  13 years ago
JeffM1999

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Erie, CO

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One-Way
Mine locked after 4 flights. Now it is locked after every flight. 600N basic, OS50 hyper, MP5. I am currently pursuing one-way upgrade options. The one-way determines whether or not I can fly my machine. It should have been engineered a little beefier in my opinion.

Guess i am #19.
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08-02-2007 02:12 PM  13 years ago
abgraham

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Deep South Texas

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#20
Mine locked after 11 flights. It now locks most flights. After the first lock-up I cleaned it and used lithium grease. Didn't make any difference for me.
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08-02-2007 03:07 PM  13 years ago
JuanRodriguez

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The Villages, Florida

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After the first lock-up I cleaned it and used lithium grease
The general consensus regardless of heli brand is that the use of ANY type of grease is a no no......

That being said, there have been documented failures by folks cleaning them out and using a light coating of oil instead.....

Who knows what the answer is other than a defective batch of clutches....
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08-02-2007 04:15 PM  13 years ago
LUCKYSTARZZZ

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tacoma wa

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... 12th flight lock up tried some differant lubes didnt work was locking every flight thats with the stock 4-4-4-4 spacing one way.

installed electric one with equal spacing on the rollers it lasted bout 30 flights now its locking up.
relubed with triflow and will see if it works

so thats 2 so far for me
the ground always wins! ..my heli can beat up your heli
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08-02-2007 04:17 PM  13 years ago
abgraham

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Deep South Texas

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The general consensus regardless of heli brand is that the use of ANY type of grease is a no no......
Yea, I've read that too; but, the white lithium seems to be working for some of the guys here?
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08-02-2007 05:48 PM  13 years ago
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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is it failed or is it not dear rocko.. Mine is not failed it had two faults.. Nothing more than having to reboot your system after a good gaming session I for one do not consider mine failed.. as it was not replaced nor cleaned, nor anything, just unwedged and flown again..
Good point.

Or you can consider whether or not it is a soft failure or a hard fail.

But then again, we all hate it when we have to reboot our computers, and would you be happy with a car that you had to pull over every once in a while to restart?
Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know
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08-02-2007 06:40 PM  13 years ago
ldp787

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South,ILL

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#21 and #22
Brand new heli lubed with ATF and failed less within 5 flights.

2nd one way lubed with white lithium lasted about 5-6 flights, locked up for 1 flight, freed itself then immediatley locked again and has remained that way.

I will fly with this POS oneway locked until there is a resolution.
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08-02-2007 06:53 PM  13 years ago
jaxrotor

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Jacksonville FL

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Rock... I have 3 machines with 0 soft or hard failures on the oneway. 0/3= 00.00% .. You have flown one of them and saw 3 or 4 flights on it.
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08-02-2007 07:07 PM  13 years ago
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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jaxrotor,

Well, so far we are at approx 17% failure. So you are in the majority 83%.

Hope it stays that way.

I cleaned out all the red grease with alcohol and lubed mine up very good with ATF last night. Hope that works.
Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know
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08-02-2007 07:15 PM  13 years ago
electriciancarl

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Xxxxxxx

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I wonder why the nitro has this problem and the electric doesn't. We E-guys run up to three times the horse power and have no issues with the same parts.
Also, I do not lube mine. My NIP spare is nicely pre-greased as all of mine have been. Aren't yours?
An E version locking up would be very bad. Brrr. The thought of trying to auto with my motor engaged. Scarry.
Treat me good, I'll treat you better. Treat me bad, I'll treat you worse.
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08-02-2007 08:18 PM  13 years ago
JuanRodriguez

rrProfessor

The Villages, Florida

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Just a thought...
Can someone that has NOT had a problem mike his mainshaft ?? (edit: make that the sleeve)

Same thing with the folks that HAVE had a problem.....

Same thing with someone with the E version....

Would be interesting to see if there is a big difference in the dimensions....
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08-02-2007 08:23 PM  13 years ago
DS 8717

rrProfessor

Here wishing i was somewhere else

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There is a new sleeve #H60139 that replaces the 60018 sleeve.

http://www.grandrc.com/inc/sdetail/80592
YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED
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08-02-2007 08:34 PM  13 years ago
jaxrotor

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Jacksonville FL

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Can someone that has NOT had a problem mike his mainshaft ??
What does the main shaft have to do with the oneway?
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08-02-2007 08:34 PM  13 years ago
Wa11banger

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Huntsville, Al

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Rocko, 17% of people who reported they owned a Trex on the forum.. I had not posted mine in there I am sure there are more than a little over 100 Trex600N's flying in the world.

Agreed about the car analogy but the cool part is my heli hasnt needed a reboot since the initial soft failure. There fore it was a hiccup more like extra water in the gasoline of that car.

Rick
Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team
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08-02-2007 08:58 PM  13 years ago
JuanRodriguez

rrProfessor

The Villages, Florida

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What does the main shaft have to do with the oneway?
Should have said "measure the sleeves"

Sprague bearings are designed to operate within certain dimensional tolerances..... perhaps there is a bad "batch" of sleeves that fall short of the required tolerances......

The dimensions I requested may shed some light....

Or perhaps there is simply a bad "batch" of one ways....
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08-02-2007 09:08 PM  13 years ago
ringram2077

rrApprentice

Birmingham, AL

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Sprague bearings are designed to operate within certain dimensional tolerances
You might be on to something there. If the sleeve was a little on the small diameter side seems it might let the needles run up too far and distort the cage.
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