This is getting ridiculous

[iflynething]

Still have excessive wag with the 401 and T-Rex 450. Blades are balanced as best as I can get them. Tail blades are fine.

I have the gyro under the back blue part of the frame velcroed as tight as I can possibly get it and still have the wag.

I took the 401 off my Raptor and it's doing the same thing. I'm only at 10% even in heading hold. I have gone back and redone the whole tail per finless 401 set-up video. Linkages are fine. Tail hub is centered and limits are set just as I saw in the video again.

I am at a loss of what to do.

I want to invert this thing but with a tail that's not holding, I don't know what to do now.

~Michael~

[t-rex pedro]

I wouldnt strap the velcro around the gyro. This may add to your problems or possibly cause it. The velcro should be fairly loose and used as a back-up for the sticky pad failing.

Pete

[iflynething]

I'm not sure where else to put it though. The velcro is basically supporting the gyro which is underslung under the helicopter. I will try loosening up the velcro and see if that helps

~Michael~

[ChasHeliCop]

You have the gyro attached with velcro ? Use the tape, and a velcro strap as a back up. Oh, and what do you mean you are at 10% ?

[iflynething]

Well there really isn't a place under the SE......well a flat place to mount the gyro under the front part of the tail boom.

I thought about getting that little piece that snaps in that bob was talking about in his videos.

By 10%, I mean I have 10% gain. It's actually 20% in normal and 12% in idle up and it's still wagging. Not till I get down to about 7% will it stop and by that time, the gyro is turned off

~Michael~

[ChasHeliCop]

Ricks gyro mount for the SE

http://www.wavelandps.com/clearly/

This gives you a solid surface to mount the gyro.

If I am not mistaken on the Futaba, gain below 50% is rate mode and above 50% is HH mode, it sounds like you are still in rate mode, not HH.

[DavidH]

If I am not mistaken on the Futaba, gain below 50% is rate mode and above 50% is HH mode, it sounds like you are still in rate mode, not HH.


Not with the 7C that he has.
From the 7C instructions
Adjustability:
• Plug the gyro's sensitivity adjustment to channel 5 of the receiver. (not assignable)
• STD and AVCS/Heading-hold (GY) setup types available to simplify adjustments for AVCS/Heading-hold gyros.
• Full switch assignability or may select Cond.option.
• Each gyro setting may be set from 0 to 100% gain.
• Dual mode gyros (heading-hold/AVCS and normal) are easily triggered to each mode by changing the gyro settingís
sign.
• Larger percentages indicate more gain, or gyro responsiveness.
• Tail wagging or shaking indicates excessive gain settings. Turn down gyro setting until wag stops.


David

[TMoore]

I have a feeling, the user doesn't have control over the gain channel on the gyro.

[istandalone]

get rid of the velco (gyros are supposed to be suspended with foam tape or zeal tape) asap. the 401 will not work right with velco holding it on.

[iflynething]

Ricks gyro mount for the SE

http://www.wavelandps.com/clearly/

This gives you a solid surface to mount the gyro.

If I am not mistaken on the Futaba, gain below 50% is rate mode and above 50% is HH mode, it sounds like you are still in rate mode, not HH.

Thanks. Yeah, I just forgot the guys name and Finless didn't give a website to find those things. On the 7C, you can just rotate the dial one way and once you pass zero, it will switch to heading hold.

I will take the velcro off asap and order one of those inverted mounts. For now, I'm just going to put it on top with some double sided tape and just see if something differrent will happen

Thanks for the help

~Michael~

[forjer]

As others said...use the foam tape (double-sided adhesive) not just double-sided tape.

[iflynething]

Ok. I was reading another thread. Finless actually started it and was about Ricks gyro custom mounts for the T-Rex's. Well at about page 4, someone said, the gyro has to be perpendicular to the main shaft.

Well, it finally stuck me that maybe HOW it's actually mounted it why everything is messing up. I did NOT cut the frames on the back bottom of the tail place where I put the gyro so it is tilted about 3-4 degrees....maybe even more.

I am going to make it COMPLETELY perpendicular to the main shaft and see if that helps.

I really hope so

~Michael~

[ChasHeliCop]

Another thought, you don't want the case of the gyro touching the CF frame. If you put the gyro on top, you have to worry about blade strikes and you may need to reverse your gyro setting.

[iflynething]

Well, I would only put it on top to see if that would make a difference. Maybe it touching the carbon frames has something to do with it too.

I am charging the batteries as we speak and will fly tomorrow and see what I can some up with.

I think getting that mounting plate from Rick is going to help out alot.

This thread is actually getting me somewhere and it might be helping alot.

Thanks alot guys

~Michael~

[ChasHeliCop]

Ok one more idea, make sure your gyro wires are not bundled up with all your servo wires, sometimes you can get interference.

[iflynething]

They are definately bundled up like that and actually sit RIGHT where the servo leads plug into the reciever.

I'm pretty much going to change everything around tomorrow

~Michael~

[iflynething]

I put the gyro on top hoping everything would be solved, but that didn't help at all either.

Everything was level. I didn't have he double sided foam tape on it, just the velcro strap going over it, but it was snug and I still have the wag.

I'm running out of options. I was hopeing to take it to Joe Nall and have someone look at it, but if I had Spectrum, it would be alot easier so we could mess with the radio

~Michael~

[iflynething]

Alright. I put on another servo. Just a standard 20 something oz/in of torque GWS servo to see if that would change anything.

DEFINATELY DID. So, I guess I have narrowed it down to the servo being the prolem. Of course, the LAST thing I do is what that problem is.

I am not up to 35% in normal and 31% HH in Idle Up. This is servo is pretty slow at 4.8v .16 transit time and 25 oz of torque and on 6v it's a blistering fast .13 and only 32 oz of torque compared to the HS-81 (which is what I was running) having 36/45 oz/in on 4.8 and 6v.

What actually is it running on. Is the ESC bringing it down to 4.8 or 6v?

Could I set a delay to improve anything. I think the gain is still a little bit too low

~Michael~

[Canuckhelifreak]

I have a 450 se with the 401 mounted on the upper part of the tail boom mount.
You need to get some foam tape under that gyro between it and the hard tail mount and
side frames.... you'll possably get high frequency interferance and the vibrations of the machine mess with the gyro.
Make sure that if you are using a analog servo to have the gyro switched right...
the digital mode will kill that servo quick!
Not good if your flying at the time..
Good luck..

[iflynething]

The gyro is set right. I bought another HS-81 for the tail to see if that would help and it definately did but I still have the twitch.

I am going to hard mount it to the top (just for now) to see if that helps. I think the high frequency is what's killing it

Thanks

~Michael~