Tail Drift

[Rusty2]

i have a 3g 2.0 on a t rex 450 pro and im getting a real slow drift any suggestions? It has been a pain to set up but this is the last of it i hope??? One more thing im running a scorp 2221-6 150 main gear and a 13 tooth pinion cc50 with gov mode on and it is slaying my batteries. motor is cool and speedy is cool. batteries are gens ace 2200 55c Thanks

[ferebeed]

Did you set up the tail in rate mode?
What do you mean about your batteries?


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[ferebeed]

Do you have a 3GX?


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[Rusty2]

I set the tail up in hh. As far as the bats a normal flight would be about 5 1/2 min but now with this gearing about 3 min and the bats are quite warm. I think i need to drop 2 teeth on the pinion. And this is a 3g not 3gx

[ferebeed]

I agree with dropping down two teeth. What head speed are you running & at what % on you throttle curve?
As for the tail if you put it in rate mode and hover it & the the tail starts to move, then use your trim until you it can have a straight. Then land it & look were the slider arm is. I will make a mark on the linkage rod & put the trim back to center on the radio. Then pop off link to the slider adjust it to the mark. Then take off & if it flies good in rate mode then flip the switch into HH. Your servo won't have work so hard & your tail drift should be gone. Last time I had tail drift was on my Blade 400. That was 6 heli's ago. Hope this helps.


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[Rusty2]

Originally Posted by ferebeed

I agree with dropping down two teeth. What head speed are you running & at what % on you throttle curve?
As for the tail if you put it in rate mode and hover it & the the tail starts to move, then use your trim until you it can have a straight. Then land it & look were the slider arm is. I will make a mark on the linkage rod & put the trim back to center on the radio. Then pop off link to the slider adjust it to the mark. Then take off & if it flies good in rate mode then flip the switch into HH. Your servo won't have work so hard & your tail drift should be gone. Last time I had tail drift was on my Blade 400. That was 6 heli's ago. Hope this helps.


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Head speed is set at 2700 in gov mode . And im using a castle ice 50

[Rusty2]

And where can you get an 11 tooth pinion? looks like they have every other count but an 11 t.

[ferebeed]

Are you using helical gears or straight cut main gear?


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[Rusty2]

Originally Posted by ferebeed

Are you using helical gears or straight cut main gear?


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Straight cut

[ferebeed]

Maybe you should try 3000 rpm


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[ferebeed]

I run the 450mx with a 12 tooth helical gear & the 35x ECS at 100% & my head speed is 3300rpm. I run 2200 mAh at 4 min & put back 1400 mAh. All runs cool. On my 500 I run 2700 rpm


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[ferebeed]

That also could be your tail drift problem To low of head speed maybe.


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[Rusty2]

Originally Posted by ferebeed

That also could be your tail drift problem To low of head speed maybe.


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whoo and i thought 2700 was high.....ill give it a try nothing to loose and thank's for the imput

[ferebeed]

[ame]http://youtu.be/GeESzps8csM[/ame]

Here is how I check my tail set up for no binding.


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[ferebeed]

I was looking at my tach history on my iPod & at 70% throttle curve the head speed is 3300 & at 100% it's at 3600+

[ame]http://youtu.be/7RMzPOKUfUw[/ame]

You might be able to hear the difference



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[Rusty2]

Originally Posted by ferebeed

I was looking at my tach history on my iPod & at 70% throttle curve the head speed is 3300 & at 100% it's at 3600+

http://youtu.be/7RMzPOKUfUw

You might be able to hear the difference



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Yeah buddy nice flight .......That's about how mine sounds but ill still bump it up to 3000 and see if there are any changes. Thank's for all the feedback it has been useful

[ferebeed]

You still need to get the tail to work in rate mode. That will help in a big way.


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[Rusty2]

Originally Posted by ferebeed

You still need to get the tail to work in rate mode. That will help in a big way.


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I test flew it this morning and the tail did not drift go figure. But about half way through the pack it started to wag a tiny bit. I'm starting to think it is the weather going in and out of the garage where it stays 60 and out side temp is around 35-40.......Maybe who knows???

[ferebeed]

I always let mine sit out side for 20 min. I I'm driving & it is cold out side I roll down the windows for awhile before I find my spot. If its hot I do the same thing. If the gyro is not the same temp I think it could mess with it. I have done this with the Blade 400, CP Pro, Align GP750, JR 370 3D, Jr770, ZYX-S, Ar7200BX, & both my 3GX's. don't have the JR 370 or the Ar7200BX I traded for another 3GX after 3.0 came out.


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[bad007]

Originally Posted by Rusty2

I test flew it this morning and the tail did not drift go figure. But about half way through the pack it started to wag a tiny bit. I'm starting to think it is the weather going in and out of the garage where it stays 60 and out side temp is around 35-40.......Maybe who knows???

Links can get tight when they get cold and even the pitch control links with the brass bushings also.