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ANOTHER damned TBE problem with my CX2!?

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E-Flite Helicopters Discuss the line of E-Flite mini and micro helis including the Blade CP, CP Pro, Blade CX, etc

ANOTHER damned TBE problem with my CX2!?

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Old 12-04-2007 | 10:43 PM
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Default ANOTHER damned TBE problem with my CX2!?

So as you guys know Ive been having this tbe thing goin on for a while...well pretty much since after the first time Ive flown it. Anyhow, I took it the hobby shop...he eye balled it etc, said it was the inner shaft! So I put that on along with new blades and a flybar and its the same thing!!! I noticed a wobble on the outter shaft when I just use the lower shaft....could it be that? Or the the bearing issue? I noticed mine were kinda loose in there too!! Or an unlevel swash plate? What about adjusting the pots?? Because now All it wants to do is fly forward.......I have to to trim the pitch all the way back and still hold down on the stick just to get it to hover and not go straight..but when I do that...it barely wants to fly or pitch backwards!!!!! Could I have installed that innershaft wrong? IM A NEWB I KNOW...but I have no clue about adjusting pots or servos...Im just upset I got to fly it one night....that it actually did what it was supposed to, and right when I learned to hover it I tried to yaw it and make a circle...of course crashed and I havent been able to do anything hardly with it since!! I can fly it, but in order to half ass fly it anywhere the trim is maxed out and Im still pulling the sticks to the max just to get it to hover or not fly or pitch forward! What should I do guys? Pa LEASE help me......
Old 12-04-2007 | 10:53 PM
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Default RE: ANOTHER damned TBE problem with my CX2!?

Baseball bat. Or shotgun.

Juz kiddin', I got nuthin' ...
Old 12-04-2007 | 11:53 PM
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Default RE: ANOTHER damned TBE problem with my CX2!?

If it only wants to go forward then you need to take the sero link on the left for forward and reverse and pop it off the swash plate and give it a few turns clockwise and then put it back on and try it. After a few times you will get it leveled. May have to do the other side also if it starts to move sideways. center your trim when you do this, and adjust till it dosn't go forwards. And the swash should look level or at 90 degrees to the shaft.
Old 12-04-2007 | 11:58 PM
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Default RE: ANOTHER damned TBE problem with my CX2!?

You said you noticed a wobble on the outer shaft.

While going through Soloboss' vibration identification process I observed a wobble in my outer shaft. At first I assumed that the shaft was bent. For some reason - I don't remember why - I removed the stock plastic bearing cup from the top of the outer shaft and spun the left motor up again... NO VIBRATION AT ALL. I put the bearing cup back on and spun the motor up again... Vibration. Took the bearing cup off again... NO VIBRATION AT ALL.

So I replaced the stock plastic bearing cup with the E-Flight aluminum CNC cup. This solved the vibration problem on my outer shaft and SIGNIFICANTLY improved the overall performance of my CX2.

(Interesting side note: I was talking to the owner of one of my LHS' a day after I had replaced my bearing cup. In one of the weirdest coincidences that I've ever experienced he asked me if I'd replaced my stock bearing cup with the CNC version yet. I said something to him like "this is one of the weirdest coincidences that I've ever experienced!" and then I told him I'd JUST replaced it. He told me that he ID'd the vibration in the bearing cup as a manufacturing defect quite a while back and that the majority of CX's/CX2's are affected by it. He went on to say that he is the person responsible for bringing to E-Flite's attention and for prompting E-flight to develop/manufacture the CNC upgrade.)

Anyway...
Old 12-05-2007 | 12:21 AM
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Default RE: ANOTHER damned TBE problem with my CX2!?

Ah... I almost forgot:

The first E-Flight CNC bearing cup that I bought didn't fit. It was too small and could not be installed.

The LHS where I bought the first cup didn't have any more in stock so I went to another LHS. LHS #2 happened to have both the E-Flight AND Microheli bearing cups. I preferred the MH cup 'cause it was silver, but when I put it on my heli it was REALLY loose. I mean it RATTLED. I couldn't believe that it was being sold as a CX2 cup. So I took off the MH cup and put on the E-flight. It was a little snug but it went on OK. (FYI - I took my heli to the shop with the inner shaft removed so that I could test fit the cup before I left the store.)

And that's the story of how I got rid of my outer shaft vibration.

(Since this happened, I've learned to always take my heli with me when I go to my LHS's to buy parts.)
Old 12-05-2007 | 07:36 AM
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Default RE: ANOTHER damned TBE problem with my CX2!?

I had a problem with my stock bearing cup as well, replaced it with E-flite's CNC version and the vibrations were reduced alot. There is still the tiniest of wobble though- doesn't seem to affect flight or hover, but I am going to replace all of the bearings w/ Boca ceramic bearings- they make a set for the CX2- its kinda expensive, but hopefully they will last a long time!
Old 12-05-2007 | 08:37 AM
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Default RE: ANOTHER damned TBE problem with my CX2!?

ORIGINAL: spence19802003

Could I have installed that innershaft wrong?

well, possibly, but it couldn't be that wrong or it wouldn't lift off the ground - sounds like the swashplate is whacked, or the links from the swashplate to the blades are whacked

does the swashplate top look level, front to back and side to side? - is it perpendicular to the shaft? - are the links on right?


edge


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Old 12-05-2007 | 09:54 PM
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Default RE: ANOTHER damned TBE problem with my CX2!?

The swashplate came to mind here too. How about a separated swashplate. There used to be a lot of conversation about those when the original plastic swash came apart. It seems that everyone has gone to the alloy swash - except me. I'm still using the ORIGINAL swash that was installed at the factory.
If the heli was good until the wreck, I doubt that the links changed length - but the swash might have separated.

Since I've never seen one come apart, I wouldn't know about it, but the flight symptoms sure sound right. Or am I just nuts?

Soloboss

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