Thread: VBar and tail problem

Hey.

With settings we also need to bear in mind differences in tail servos being used, all the ones up the club are running DS650's? I think AndyK's the only exception at times who I've seen running Outrage/MKS/Align/JR tail servos.

Dave, out of interest did the Fusions hesitate doing piros in both directions or just one way?
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remember Im quite new to having to mess around with VBar all the other units ive fitted have worked straight off without issue.

Ive found the figure your talking about Paul it is at 55. what is the P gain and I gain as they are different 81 and 60.

Describes it a lot better than I would

MrMel recommends to set them all at 75.

Thanks Paul. ill have to watch them later, the guys in the office wouldnt appreciate mr mel talking Vbar this time of the morning LOL.

I dont mind minor problems like this it forces you to learn more about the system, trouble is ive only got a small window till the weekend, when I wanted to give it a spanking. :-)

I have never had to touch the parameters in the tail due to an 'issue', only to see what they do.

Straight out the box settings have always been pretty spot on IMO.

Have you posted in the Vstabi forum?

Same here, I've never messed with the settings and am just using out of the box V-Bar settings. Granted for other helicopters and set-ups you may need to change them more.

Have you managed to try new thrust bearings yet?

Originally Posted by coolice

Hey.

With settings we also need to bear in mind differences in tail servos being used, all the ones up the club are running DS650's? I think AndyK's the only exception at times who I've seen running Outrage/MKS/Align/JR tail servos.

Dave, out of interest did the Fusions hesitate doing piros in both directions or just one way?
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No it was both ways, Ian. Baz's was that bad there was no right rudder at all and he had to level out before he could regain the tail. In our case we were doing knife edge piros but I don't understand the difference in being upright or knifedge. Is there something to do with the air flow and the fact that the tail knife edge is acting like the elevator and is hard over to the right in order to maintain the attitude and stop the tail dropping. I know it's not Tonys problem but there is something simialr maybe.

It is very much like that, the tail is just hesitant in moving much like the gyro is working against itself to start with, its really weird. this is my 4th vbar and all the rest like you guys have worked out the box, heck I didnt even know there were those other settings on the tail section lol.

As Andy said above something changed in the latest V bar software. I don't use one so not aware nor understand but earlier versions were fine and he spent longer with the current version as settings ended up in different areas. Send Andy a PM and he'll explain it better

Originally Posted by waveydavey

No it was both ways, Ian. Baz's was that bad there was no right rudder at all and he had to level out before he could regain the tail. In our case we were doing knife edge piros but I don't understand the difference in being upright or knifedge. Is there something to do with the air flow and the fact that the tail knife edge is acting like the elevator and is hard over to the right in order to maintain the attitude and stop the tail dropping. I know it's not Tonys problem but there is something simialr maybe.

Hi Dave.

I think the problem you guys saw was made worse by the weather cocking effect of the forward flight speed on the tail rotor, a test trying stationary piro's and then fast forward flight piro's will perhaps show the difference between what the model is doing and how the tail reacts.

In Tonys case the different P & I gain(?) values might even have had a/bearing on the differing tail feel.

I'm going to watch the videos myself later to understand it better.
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Ian the odd thing is in ff it would piro okay, mine was just in the knife edge.

Daily update, getting a little fed up with this now lol.

Ok I have now got the horn as far out as it will go, I've changed the setting Paul suggested to 75 and it is exactly the same, not banging the stick over and feeding it in slowly just does the same thing only slower.

To add to the equation looking at the tail holders I am thinking they are quick uk so I've no doubt bought the wrong bearings lol