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Mikado V-BAR Control Mikado V-Stabi/V-BAR Control Flybarless System Software and Hardware Support


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Old 05-16-2021, 11:58 AM   #1 (permalink)
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Question Pitch Curve Question (too sharp pitch in the middle)

Hello everyone!

I have a problem: when I do maneuvers which are needed precise control of collective pitch (rolling hurricane, flips and piroflips with reverse) helicopter does loops instead of normal flips. Collective pitch is too sharp in the middle on My logo 700. But Vcontrol pitch curve only have 5 points. Are there any ways to add extra points for curve or something like expo in the middle of collective pitch?
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Old 05-16-2021, 12:10 PM   #2 (permalink)
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I would keep my pitch curve linear and use expo on the collective and/or cyclic.
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Old 05-16-2021, 12:20 PM   #3 (permalink)
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Quote:
Originally Posted by Weule View Post
I would keep my pitch curve linear and use expo on the collective and/or cyclic.
Yeah, I am using expo for cyclic and for rudder too. But pitch is too sharp in the middle so while rudder reversals its too hard not to touch collective pitch when its not needed (mode 2).
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Old 05-16-2021, 02:24 PM   #4 (permalink)
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Sounds more like a technique issue with the fingers. Get a sim and practice not moving the collective. Yes it's hard not much else to do.
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Old 05-16-2021, 11:36 PM   #5 (permalink)
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You can set the 50% points to get an S curve that will make collective less sensitive around neutral. Another way to get a better curve is to use macrocells, by introducing a curve cell into collective channel.
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Old 05-17-2021, 12:59 AM   #6 (permalink)
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I need exactly the same thing. But it's not easy to ask for it while people protects this much the ultra mega ultimate transmitter vcontrol. There is nothing about finger technique, it's what some people want to have.

I didn't think that I can with macrocells, I'm going to search it, thanks
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Old 05-17-2021, 12:40 PM   #7 (permalink)
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Quote:
Originally Posted by dschertz View Post
Sounds more like a technique issue with the fingers. Get a sim and practice not moving the collective. Yes it's hard not much else to do.
I think I have enough practice :-)
Just asking are there any ways to make collective smoother in the middle in VBC.
I am learning new maneuvers at the moment and I really cant do pirofunnel with reverse as heli starts climbing up or down. Even autorotation at high rpm is very hard as while landing heli bounces up and down.

Dmitriy Grudeckiy - Heli Bite 2019 (3 min 19 sec)
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Old 05-17-2021, 12:43 PM   #8 (permalink)
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Quote:
Originally Posted by Vinger View Post
You can set the 50% points to get an S curve that will make collective less sensitive around neutral. Another way to get a better curve is to use macrocells, by introducing a curve cell into collective channel.
Thank you!)

I will try to change 50% points. If it wont help, Ill try to experiment with macrocells
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Old 05-20-2021, 01:13 AM   #9 (permalink)
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Within the "edit macrocells" menu, go to the ESC channel and edit it.

Make it a "curve type".....it will have 7 points on the curve.

Adjust the curve as necessary for your particular situation.

When you adjust this, be extremely careful as you might get an
unexpected "spool up", so try not to use the main batts.

Use a small 2S batt to power up your avionics to adjust your FBL curve.

Cheers
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Old 05-22-2021, 06:31 AM   #10 (permalink)
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Hi there,
I'm here again to thank macrocell advice.
I've done it and it works exactly in the way I want.
I've set a macrocell to collective with 7 point curve, it was very easy to set it.
Cheers
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Old 05-25-2021, 01:24 AM   #11 (permalink)
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Quote:
Originally Posted by Kgnx View Post
Hi there,
I'm here again to thank macrocell advice.
I've done it and it works exactly in the way I want.
I've set a macrocell to collective with 7 point curve, it was very easy to set it.
Cheers
I'm curious to see how you have done it. Can you post pictures of your macrocell settings? From all the reading I did on the vstabi forum, the conclusion was that vbar control doesn't currently support more than a 5 pt curve for collective. The problem is that in macrocells, you can only specify "outputs" to be the CH1, CH2, AUX1 etc, so basically the physical pins on the neo hardware. You can't specify "collective" to be an output.
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Old 05-25-2021, 03:09 PM   #12 (permalink)
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Quote:
Originally Posted by [email protected] View Post
I'm curious to see how you have done it. Can you post pictures of your macrocell settings? From all the reading I did on the vstabi forum, the conclusion was that vbar control doesn't currently support more than a 5 pt curve for collective. The problem is that in macrocells, you can only specify "outputs" to be the CH1, CH2, AUX1 etc, so basically the physical pins on the neo hardware. You can't specify "collective" to be an output.
Hi,
I thought that I 've done it, I was so happy until I realize that it does not output to collective channel. I thought that it would change once I select there collective channel, but it was only input.
You are right, you can't specify that 7 point curve to collective as output. I said it works for the output value written in the macrocell edit screen and it works as per the curve you define, by the way.
So I'm still on for any advice
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Old 05-26-2021, 05:41 AM   #13 (permalink)
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OP ... have you tried tightening the collective gimbal? Maybe it would be possible to move the stick more precisely if there were more resistance? I found the stock too loose for my liking and tightened up the band inside somewhat so that it required more force to move. I'm not capable of the maneuvers you describe though so I don't know if it would help gain control there.
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Old 06-13-2021, 12:34 PM   #14 (permalink)
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I think the first answer was the correct one - it might have been simply overlooked or wrongly read.

Quote:
I would keep my pitch curve linear and use expo on the collective and/or cyclic.
Quote:
Yeah, I am using expo for cyclic and for rudder too.
There is an EXPO for collective in MAIN ROTOR

https://www.vstabi.info/en/node/1816

Exponential
alters the control curve from stick (input) to swash plate (output) in a way that it feels less direct/aggressive around center.
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Old 06-15-2021, 12:01 AM   #15 (permalink)
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My VCT has a 7 point curve.
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Old 06-15-2021, 03:04 AM   #16 (permalink)
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Quote:
Originally Posted by mdu6 View Post

There is an EXPO for collective in MAIN ROTOR

https://www.vstabi.info/en/node/1816

Exponential
alters the control curve from stick (input) to swash plate (output) in a way that it feels less direct/aggressive around center.
ONLY for cyclic not on collective.
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Old 06-15-2021, 10:33 AM   #17 (permalink)
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i had this on my Raw drop collective dynamic 5 points in mainrotor expert menu
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