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mjg44mjg
Extreme 3D
Joined: 14 Jul 2011
Posts: 120
Location: Aberdeen, Maryland
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 Posted: Sat Aug 20, 2011 7:18 pm
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I didn't get a chance to fly it last night due to the rain but, I'm going to try and find some of that evaporating silicone spray today.. Don't know where to find it though. maybe head to the hobby shop and get new blade grips and a anti rotation collar..
Not exactly sure what the feathering shaft is. I'll have to break out the manual and look that part up...
Once I get it in the air tonight I'll let you all know what I found out after making some adjustments and lubing things with that spray..
Hopefully I'll be able to get that controlability back...
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BLADE CX2, 120SR, SR, Scout CX, ESky Big Lama, E500
Fly til you crash, crash til you learn...!! |
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Tom Lauten
Extreme 3D
Joined: 11 Sep 2010
Posts: 332
Location: Inverness, Scotland. 47 and counting...
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Posted: Sat Aug 20, 2011 9:12 pm
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The feathering shaft. the O-rings and spacers are the parts in the exploded diagram on the 1st page of this thread with the number BLH 3113.
They make up the axel and the "shock absorbing bearings" that the rotor head pivots on. I can only imagine that if they are worn, dry, bent (or even missing) TBE could easily be the result.
Roll the shaft on a sheet of glass or mirror to see if it has any bend at all.
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If only I could fly as well as I spend money I don't have...
All Blades, all the time...
MSR
MSR X
MCP X
120SR
Blade 400 |
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nick_onelove
Extreme 3D
Joined: 01 May 2011
Posts: 827
Location: Mendocino County, CA, United States 21 years old
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Posted: Sat Aug 20, 2011 9:52 pm
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I agree with Tom: definitely try a new feathering spindle, or at least roll it on a flat surface to check it. Especially before trying a new anti-rotation collar; I just don't see how anything could be wrong with your current collar if it looks fine.
As for the dry-type silicone spray, I ordered mine online, but it looks like Home Depot has it available in-store: http://www.homedepot.com/h_d1/N-5yc1v/R-202529794/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053
You can even "Check Store Availability" of your local branch at the right of that page.
_________________
Align: Trex 250 3GX + Trex 450 Pro with Vbar
Blade: 450 X, mCP X, 120 SR, mSR X, CX3, mCX2
Esky: Belt-CP X and V2 - Futaba: Heli-Max Axe 400
Walkera: V500D01, M120D01, V100D08, DEVO 8
Spektrum: DX8 - AMA #967873 - IRCHA #4095 |
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mjg44mjg
Extreme 3D
Joined: 14 Jul 2011
Posts: 120
Location: Aberdeen, Maryland
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mjg44mjg
Extreme 3D
Joined: 14 Jul 2011
Posts: 120
Location: Aberdeen, Maryland
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Posted: Sun Aug 21, 2011 3:22 am
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I checked the feathering spindle, it seems to be straight and it moves I think a little more freely in the rotor head than it should. Its real easy to push it from one side to the other... Be that as it may, that spray I bought is garbage, going back to the home depot to get the other stuff.. But I just flew through 2 packs and the TBE seems to be more front to back, like a pendulum effect more so than nice big concentric circles associated with TBE.. I also noticed that, from a rear view of the heli while flying that it seems like it wants to lean to the left. and no matter how much I adjust the ball servo links for aileron, it always slides to the left before liftoff...
any ideas now??
PS don't ever ever ever buy that spray I did....
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BLADE CX2, 120SR, SR, Scout CX, ESky Big Lama, E500
Fly til you crash, crash til you learn...!! |
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nick_onelove
Extreme 3D
Joined: 01 May 2011
Posts: 827
Location: Mendocino County, CA, United States 21 years old
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Posted: Sun Aug 21, 2011 4:04 am
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All helicopters with tail rotors naturally lean a little from the thrust of the tail.
Remember a pendulum effect is to be expected because of the 45-degree flybar which lends the 120 SR all of its stability. That pendulum effect is how the heli stabilizes itself when you let go of the sticks. So if the circling motion is gone, it sounds like your TBE might be cured?
This is the spray I ordered online: http://www.amazon.com/Silicone-Spray-Dry-Type-Lubricant/dp/B000MQX7K2
What was wrong with the other two?
_________________
Align: Trex 250 3GX + Trex 450 Pro with Vbar
Blade: 450 X, mCP X, 120 SR, mSR X, CX3, mCX2
Esky: Belt-CP X and V2 - Futaba: Heli-Max Axe 400
Walkera: V500D01, M120D01, V100D08, DEVO 8
Spektrum: DX8 - AMA #967873 - IRCHA #4095 |
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mjg44mjg
Extreme 3D
Joined: 14 Jul 2011
Posts: 120
Location: Aberdeen, Maryland
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Posted: Sun Aug 21, 2011 4:21 am
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It could be I'm just too OCD about certain things and just won't rest until it meets my standards which apparantly it never will... Just the nature of the beast I guess. it flies pretty good, I just need to practice with it... I just can't fly it like the guys on the videos... Might also help if I had a DX6I binded to it.... Gotta wait til tax season for that... And the 450 3d
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BLADE CX2, 120SR, SR, Scout CX, ESky Big Lama, E500
Fly til you crash, crash til you learn...!! |
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mjg44mjg
Extreme 3D
Joined: 14 Jul 2011
Posts: 120
Location: Aberdeen, Maryland
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Posted: Sun Aug 21, 2011 7:51 am
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OK,... Well....... I've hit a milestone this evening.... It WAS the nature of the beast to fly the way it flies....... I was able to get the controllability back.. Flew two packs and it was as stable as it should be...
I was WAY TOO jumpy on the cyclic... Wild sporadic giant movements just don't do the job.. I guess it was the NOOB in me... lol... Made some adjustments on the servo arms and she flew great... Granted I had to constantly lean on the elevator.. It flew steady, it flew forward.. Now, as soon as I let go of the cyclic it started the wild flight characteristics again but constant forward input on the elevator calmed it down.. It seems that with no input the 120, mine anyway, is all over the place... I guess I didn't realize that constant input was needed to keep her steady... Just like driving a car in a way... Let go of the wheel long enough you hit a telephone pole.... BUT, I reeled her in this evening and couldn't be happier with the way she flew..
Anyway, just wanted to say thanks for all the advice, and all the help and diagrams and links and EVERYTHING.....!!!! I appreciate..
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BLADE CX2, 120SR, SR, Scout CX, ESky Big Lama, E500
Fly til you crash, crash til you learn...!! |
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platinum
Extreme 3D
Joined: 31 May 2011
Posts: 272
Location: Bangkok Thailand
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Posted: Sun Aug 21, 2011 9:03 am
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| mjg44mjg wrote: | | OK,... Well....... I've hit a milestone this evening.... It WAS the nature of the beast to fly the way it flies....... I was able to get the controllability back.. Flew two packs and it was as stable as it should be..... |
Hi mjg44mjg,
Glad to hear you get with your bird. 
As you said " I guess I didn't realize that constant input was needed to keep her steady...Just like driving a car in a way ".
I just posted in other forum about how to fly the 3 channel for the beginner mention that "the reaction time at the point will determine how steady they can keep the helicopter. If you are too quick or too slow then it will drift. Also explain about overcorrecting. Everyone does it at first. See not only do you need to learn which way to move the sticks but how much also. Most people overcompensate and end up in a feedback loop where they end up constantly correcting their previous move".
Have fun flying. 
platinum
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/Goal : relaxed flying with the least fixing.
Last edited by platinum on Sun Aug 21, 2011 1:57 pm; edited 1 time in total |
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nick_onelove
Extreme 3D
Joined: 01 May 2011
Posts: 827
Location: Mendocino County, CA, United States 21 years old
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Posted: Sun Aug 21, 2011 9:32 am
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That's great to hear! And I agree with everything platinum said.
It's actually a good sign that you're too jumpy on the cyclic though, that tells me you're probably ready for a CP! And once you get a DX6i, you can program in some negative exponential to make the 120 SR more sensitive.
_________________
Align: Trex 250 3GX + Trex 450 Pro with Vbar
Blade: 450 X, mCP X, 120 SR, mSR X, CX3, mCX2
Esky: Belt-CP X and V2 - Futaba: Heli-Max Axe 400
Walkera: V500D01, M120D01, V100D08, DEVO 8
Spektrum: DX8 - AMA #967873 - IRCHA #4095 |
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Splitts
Hover Master
Joined: 29 Sep 2011
Posts: 13
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Posted: Sat Oct 08, 2011 9:44 am
Post subject: TBE effect |
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Sounds exactly like my problem. What get me is one day it flew perfect the next day out of control.
Hope you get it fixed so I can fix mine.
Splitts |
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