Tail wag with upped throttle fast

[cambs flyer]

Remember me saying about the rear tail wag when I spurt the power fast and tail in the end jumps to the right, well it's still doing it, not as bad as before but it's still there.

If I up the throttle a little fast to say avoid a hard landing it's not to bad, but if I give the Throttle fast little kicks the tail kicks round to the right, also here and there not that it causes any problems (but I'm not happy about it) while in normal flight the tail can whip a little without any input

The tail belts is tensioned correctly and the mesh gear / main drive cog is spot on, the tail cog is a little misshaped where it goes up and down a little a she turns, but I've never came upon one that doesn't and I've been told thats not a problem.

So the mechanical side of things seem OK, she flys like a dream, but its only when power kicks are added does the tail move to the right (when looking at her from tail in).

Could this be a result of little if any lub' in the one way bearing?

Or no lub where the tail drive gear fit's within the upper main gear from below?

Any ideas what I can do chaps.

[t-rex pedro]

Remember me saying about the rear tail wag when I spurt the power fast and tail in the end jumps to the right, well it's still doing it, not as bad as before but it's still there.

If I up the throttle a little fast to say avoid a hard landing it's not to bad, but if I give the Throttle fast little kicks the tail kicks round to the right, also here and there not that it causes any problems (but I'm not happy about it) while in normal flight the tail can whip a little without any input

The tail belts is tensioned correctly and the mesh gear / main drive cog is spot on, the tail cog is a little misshaped where it goes up and down a little a she turns, but I've never came upon one that doesn't and I've been told thats not a problem.

So the mechanical side of things seem OK, she flys like a dream, but its only when power kicks are added does the tail move to the right (when looking at her from tail in).

Could this be a result of little if any lub' in the one way bearing?

Any ideas what I can do chaps.

What servo/gyro is it mate?

[cambs flyer]

Its a Art-Tech Head Lock Gyro, it hasn't given me any trouble before, so I don't know if that's any help at all.

Oh yea and the tail servo is a Tower Pro, but again its been as good as gold up till now.

[Smoothound]

Are you flying in Normal? If you are what is your curve set to?

Gain too low? Static hits? Belt drive gear in the frame slipping?

[cambs flyer]

Your have to forgive my lack of knowledge here, OK there's no belt slippage, as for the gain I don't know and as for static hits TBH I haven't a clue mate?

The Gyro is set to hold, and the Throttle rate is set to 0 - 70 - 100, which I'm comfortable with.

[t-rex pedro]

Its a Art-Tech Head Lock Gyro, it hasn't given me any trouble before, so I don't know if that's any help at all.

Oh yea and the tail servo is a Tower Pro, but again its been as good as gold up till now.

I have to admit I dont know anything about this gyro/servo combo mate.

However, I would suggest that it sounds like your flying is improving therefore you are now punching the collective which shows up tail issues that you didnt see when you were just hovering.

I know alot of people run a 401 with a 9650 servo and it holds rock solid.

Sorry I cant help much more. Maybe adjust the gain as Smoothound suggests. There should be a gain pot on the gyro or a function in your transmitter menu.

[cambs flyer]

Thank you for the complement mate, but I've struck the throttle stick like this before and she's stayed rock solid.

There is a gain adjustment on the gyro and on the TX, trouble is up since my last crash its all been fine and I'm a little unsure as to what and how to adjust the gain in either the DX6 or Gyro box.

[Smoothound]

I'd also try upping your throttle curve so it is more consistent above half stick.

I'd also agree with t-rex pedro about your flying.

[t-rex pedro]

Thank you for the complement mate, but I've struck the throttle stick like this before and she's stayed rock solid.

There is a gain adjustment on the gyro and on the TX, trouble is up since my last crash its all been fine and I'm a little unsure as to what and how to adjust the gain in either the DX6 or Gyro box.

Just done a quick google search and it seems the Art-tech gyro is the same as the telebee/e-flight. TBH mate its not a great gyro. I have one on my twister storm and it kicks the same. The best cure is to get a better gyro/servo. I prob wont bother with my twister but I def would if I had the 450 like yours.

[Pipistrelli]

Wayne,

Some of the cheaper gyro's do kick slightly when you put a chunk of power in. However, the tail kick should return when power is reduced, it shoudn't drift! This almost seems like a slight lag in the system, possibly caused by cheaper servo's, I'm not sure! Even my 401 equipped SE tail moves ever so slightly under large power inputs!

I'll come over Thurs evening and see if it will improve with an increase of gain. However, it will help if you apply power smoothly. If you punch it, like for 3D type manoeuvres you would be better with a 401 gyro for better performance.

Like someone said earlier, I think your flying is now showing the limitations of that gyro and servo!

[cambs flyer]

Thanks guys very much indeed

Mike I've adjusted the gain pot to lower the gain and with the batt I had in her she was a dream to fly, however when I changed to another batt the tail wagged like crazy and was very uncontrollable.

I've increased the gain and she's still very unstable so dam if I know whats happened, I'm going to set the pot to the position it was before I messed around with her and see if that brings her back to where she was before I started experimenting.

I guess you guys may well be right, as I've no fear in chucking her around in all directions within the limits of my flying capabilities.

Would changing the tail servo to a HS55 improve tail response? as you guys say, Now I'm looking at it from the perspective of someone Else's thoughts I have been hitting the throttle harder then before, and when I power up as I've been used to the wag doesn't happen, or if it does its only very slight.

It's a comfort knowing it might be my experience causing this issue, but hurts the wallet knowing a new purchase is just round the corner.

[cambs flyer]

Bugger, I've really balls up the gyro now I've played with the pot, I've put it back to where it was before and she's all over the place.

Another lesson, don't mess with setting before you know if there's a problem, and know what your playing with.


Bugger!

[unwind-protect]

Doesn't this gyro have a remote gain adjustment lead? If so, you're probably better off using that than fettling the pot, and adjusting the gear channel endpoints to set the gain (or whatever the usual technique is around here). If you're already using the remote gain connection then the pot on the gyro probably no longer has any effect.

I've had one cheap gyro (Align) that slowly became less and less useful; I don't know if this is common.

[LaurenceGough]

Oh man, I had that gyro on my Falcon 3D, awful awful, stick a Logictech 2100T and a JR 3400G mate and be done with it forever!

[cambs flyer]

Thank you everyone for your great advise but this is how its stands right now.

I managed to place the Gyro pot adjuster in the same position as before and she took off fine

I landed her after a few minutes to place another batt in her, and she was all over the place, really bad, untill I changed the rudder sub trim from -8 to +8 then she was completely fine, than when she came to about three quaters of the batt life the tail started having a mind of her own and she started to become very uncontrolable, so I landed her.

I placed another fresh batt in her again she took off fine, but after about 5 minutes perfect tail in hovering the same happened again, the tail went off on its own, very unstable so again I landed before she got totally out of control.

So I've got these issues, one of my batts need a -8 sub trim to fly OK, the others seem fine with the rudder sub trim at + 8 (which it has always been before today), then just half way through a batt cycle she starts loosing control and you need to land sharpish.

I'm wondering if the crash I had on Friday evening when the Gyro came unstuck from its mount where the heli hit the grass if I haven't upset something within it's circutery then once the power from a lipo reaches past the half way stage all hell lets loose.