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e-Align T-REX 250-450-500-600 > T-REX 250 Major problems with Tail setup and gyro!!! Please help!
 
 
axemanclint
Key Veteran
Location: Cypress, Tx. USA

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Alright guys,
here it is. I have finally tamed the beast (somewhat) I was able to get in 4 flights last night. I changed a lot of things on the heli from all of your suggestions.

Coolice, Thank you so much for all the help and suggestions you have gone above and beyond man and I thank you!

knightofcarnage, you have been a great help and a lot of your suggestions really ended up working out.

Anyway, after switching out the servo horn and moving the ball in to around 4.5 - 5 mm. from center it brought the wag down a good amount, but it still wasn't good enough.

I then re-adjusted the entire positioning of the tail servo and re-trimmed the whole heli mechanically as close as possible. right now i am trimmed out mechanically with only 3 clicks of trim from the radio to get the tail flying straight.

The last thing i have done (and I can't believe I didn't think of this in the first place). I went through and checked how the ESC was programmed from my friends previous settings. To my shock it was in Heli mode with (governor) turned ON. WOW!! everyone knows how poorly the Align ESC's perform in governor mode and i was having some issues with the ESC varying power when flying in IDL 1, when i would pull collective down, like in a flair it would drop power significantly and I think it was fluctuating power in a hover as well to keep the constant headspeed. Overall this would create problems with a tail not holding properly and creating some wag as well.
Well, I re-programmed the ESC and it is now in Heli (MODE 1) with only soft start NO (governor).

The next thing to really lock in the tail will be to purchase the shorter tail blades from Align and also maybe try going even closer in with the ball to the center of the servo by using a round servo horn and drilling a hole around 3.5 mm from center.

Anyway, Right now the tail is holding enough to at least make it flyable. I am really excited about this heli and look forward to honing it in even more as time goes on.

Thank you SO MUCH guys for all your help and I will check back with you all again if there are any other issues. Take care and happy flying everyone!

Cheers,

-Clint

"what goes up must come down," hopefully in one piece!
10-31-2009 06:21 PM
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dkshema
rrMaster
Location: Cedar Rapids, IA

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Wow -- that governor mode thing is so easily overlooked.

-----

* Making the World a Better Place -- One Helicopter at a time! *

Dave
10-31-2009 07:07 PM
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pkfrizzlefry
Senior Heliman
Location: Newington, CT (Central Connecticut)

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Make sure

I just had similiar trials to yours with the GP750

http://rc.runryder.com/helicopter/t550265p1/

It turned out to be BAD interference between the ferrel ring and motor..the ferrel ring was about 20MM or 1/2inch aprox from the motor..this made the gyro flip out..

Once i moved the ring, everything worked out

Weird but fixed



GL

Fly, Fly then Fly some more!!
10-31-2009 07:15 PM
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axemanclint
Key Veteran
Location: Cypress, Tx. USA

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Quote 
Wow -- that governor mode thing is so easily overlooked.

Yeah! No kidding. It wasn't until my flights yesterday and how poorly the throttle response was reacting, that I thought about the fact i hadn't checked the programming yet. They need to just take the (governor) programming out of their ESC's to begin with, it's no good.

"what goes up must come down," hopefully in one piece!
10-31-2009 07:48 PM
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knightofcarnage
Senior Heliman
Location: chicago

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I would just spend the $3 and get 37mm
10-31-2009 07:58 PM
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himaxkeith
Senior Heliman
Location: Atlantic City NJ. USA

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Try to take out any trim you have for the tail by changing the length of the tail rod otherwise it still wont know where the true center is or it will drift. I havent foung anybody that had any luck using the governer mode. They should put right in there instructions. "Governer Mode may cause uncontroled tail wag" Use at your own risk.
10-31-2009 11:27 PM
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coolice
Key Veteran
Location: Northamptonshire, England

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Hey Clint,

Your very welcome and I am happy to hear you are finally able to fly the machine and feel comfortable with it, as they are rewarding little models to fly.

Oh that was a good find, I didn't even think about govenor mode being turned on but does explain a lot remembering back to other peoples posts about govenor expereiences.

The smaller batman tail blades are spot on with regard to size at 37mm as the little tail rotor does spin quite fast and so is powerful already without a large diameter tail disk.

Keep us informed of your flying sorties
.

Ian Contessa
Team Robbe SchluterUK
10-31-2009 11:46 PM
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axemanclint
Key Veteran
Location: Cypress, Tx. USA

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Thanks, will do coolice.

Cheers,

-Clint

"what goes up must come down," hopefully in one piece!
11-01-2009 12:02 AM
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e-Align T-REX 250-450-500-600 > T-REX 250 Major problems with Tail setup and gyro!!! Please help!
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