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Other › t-rexers, i have a problem
05-02-2005 10:56 PM  12 years agoPost 1
bluealien

rrNovice

davie, florida

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ok, first rex i put together. everything has gone great. so i install the electronics and get her running without the main blades. heres the problem. when i aileron all the way left or right, she vibrates alot. the only thing i can see that may be causing this is that the flybar paddle control arm ball link rubs against the sf mixing lever causing it to bind during the rotation. any suggestions????

Thanks
this is very frustrating.

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05-02-2005 11:00 PM  12 years agoPost 2
MFIS

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The Netherlands

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of course she does. She isnt meant to be treated like that while on the ground. A heli wants to be free and wont act normal stuck to the ground with full cyclic inputs. Finish her up and put some blades on her and then see what you think.

good luck!

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05-02-2005 11:21 PM  12 years agoPost 3
Gary Hoorn

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Annapolis Maryland USA

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Check the post above entitled "Binding After Crash" and make sure your flybar arms are not hitting the washout arms. Also, how many degress of swashplate movement are you using. I limit mine to about 5 degrees in pitch and roll. Plenty of control and no binding or vibration.
Gary

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05-02-2005 11:48 PM  12 years agoPost 4
bluealien

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davie, florida

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gary and the rest of my t-rex family, see i don't know crap about pitch and throttle curves. this was eventually gonna lead into another post entitled "help, i dont know how to set up my radio and pitch and throttle curves and such" but since were here now, any suggestions i just wanna do basic flight for now. i practice alot on my sim, but i'm just happy with basic for now. i have a jr 6102 6 channel pcm radio. I read the instructions on the radio, but they might as well been written in an ancient long forgotten chinese dialect to me. i know how to access the menus and stuff and set things if i just knew the values to input. again all help is welcome my friends....

thanks

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05-02-2005 11:55 PM  12 years agoPost 5
55crownvic

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Colorado Springs

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T-rex Tuning can help a bunch also......................http://www.trex-tuning.com/

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05-02-2005 11:57 PM  12 years agoPost 6
Gary Hoorn

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Annapolis Maryland USA

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This website always adds a dash (-) in the URL. Remove it and the link will work.
Gary

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05-03-2005 12:56 AM  12 years agoPost 7
MFIS

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The Netherlands

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perfectly tuned for what? Thats the question. Tuning is about personal flying style and preference. For example i stiffen my head to an extreme point so much so that the heli wobbles on the ground at spool down but it flies perfectly smooth and stable in the air with the type of response i like. There are tradeoffs with anything you do to tune it and there is no "perfectly tuned" heli out there. Mine is perfectly tuned for me but you might not agree.

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05-03-2005 01:08 AM  12 years agoPost 8
derrickbwg

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Lexington, Kentucky

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you should be able to take a stock(which I assume this is as it's his first trex) Trex, especially with the blades off, and run full throttle at all angles and be super smooth...no shaking. Most of the time if there is vibration...adding blades will only make it more pronounced. With my tight dampening and well balanced blades the heli will spool up without a vibration throughout the range to liftoff and beyond. I've had them out of whack just a bit and will get the vibrations and bouncing....you can live with it but you don't have to. By perfectly tuned I believe willy is talking about one that is balanced and trimmed where it does not shake anywhere in it's throttle/pitch range.

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05-03-2005 01:28 AM  12 years agoPost 9
MFIS

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The Netherlands

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Ok well cant say I've ever been in the habit of spooling a heli up and giving full cyclic input with it still on the ground but ive always heard its a bad thing to restrain a heli to anything when its running at normal or high head speeds.

My apologies if i pointed anyone in the wrong direction. I take it all back.

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05-03-2005 01:36 AM  12 years agoPost 10
JYRiker

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Maryland - USA

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For example i stiffen my head to an extreme point so much so that the heli wobbles on the ground at spool down but it flies perfectly smooth and stable in the air with the type of response i like.
I have that exact same thing happening... Maybe you just answered my question

Johnny

HeliUp Frame Trex 450
CF Trex 600
CF Trex 500

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05-03-2005 01:42 AM  12 years agoPost 11
MFIS

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The Netherlands

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Yuh both my trex's do it. Its just to be expected when you get the disc so tightely fastened to the heli. if its all good in the air thats all that matters to me

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05-04-2005 02:40 AM  12 years agoPost 12
bluealien

rrNovice

davie, florida

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hey guys, solved my shaky bird problem. i hadn't used the innermost servos arms. i just attached them there. no to tackle pitch and throttle curves. oh and by the way, i got that info from trex tunning site. just mentioning it because of little things that are missed by newbies such as myself. so i guess the lesson here is other newbies, eat your veggies and wear tighty whitees listen to your elders and aquire more wisdom. listen more and talk less.

Thanks guys.

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05-04-2005 02:44 AM  12 years agoPost 13
MFIS

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The Netherlands

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glad you got it figured out....

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05-04-2005 02:56 PM  12 years agoPost 14
Gary Hoorn

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Annapolis Maryland USA

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bluealien,
Glad you got it sorted. I like to experiment and I also found out that too much swashplate deflection will cause the problem you were having. That is why I suggested no more than 5 degrees pitch and roll swash deflection. The TRex is sensitive to swashplate movement and is plenty "frisky" with only 5 degrees of swash deflection.
Gary

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