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Vstab 2 degress t o the left ?

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Vstab 2 degress t o the left ?

Postby StuartC » Sat Sep 16, 2017 4:29 pm

Yasim question, because I forgot how I done it before and cant remember what aircraft it was on.

I need a Vstab to be turned 2 degrees left, permanently., cant remember what to add o the vstab code block to do it.
Anyone got an idea?
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Re: Vstab 2 degress t o the left ?

Postby StuartC » Thu Sep 21, 2017 6:39 pm

5 days and no one knows?
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Re: Vstab 2 degress t o the left ?

Postby Necolatis » Thu Sep 21, 2017 9:36 pm

Cant you just make some code in autopilot, that feeds into yasim, and keeps that deflection? Just dont let rudder-cmd be feed directly into yasim, but through a mediator property.
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Re: Vstab 2 degress t o the left ?

Postby Richard » Thu Sep 21, 2017 9:39 pm

from the code all of the surfaces in yasim take the same parameters - http://wiki.flightgear.org/YASim#Surfaces

So probably incidence and/or twist are what you want.
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Re: Vstab 2 degress t o the left ?

Postby StuartC » Thu Sep 21, 2017 11:04 pm

incidence tilts a vstab back, not offset it left/right, twist might work.
There is no rudder function on the vstab im using so the autopilot mod wont work.
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Re: Vstab 2 degress t o the left ?

Postby Necolatis » Thu Sep 21, 2017 11:07 pm

Then make the whole vstab into a rudder, and move it 2 degs?
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Re: Vstab 2 degress t o the left ?

Postby StuartC » Sat Sep 23, 2017 12:20 pm

After testing using the twist function, its not giving me any real change to the behaviour of the Vstab.

What I'm trying to do is inset the offset into the Vstab that you find on some fixed wing and Helicopter vstabs ( hence no rudder ) that's used to aid in countering the torque. For helicopters, there wont be a rudder function ( except for some like the MD520N ). Also I would like to apply that to certain fixed wing aircraft so the Vstab is offset before the rudder is even applied.
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Vstab 2 degress t o the left ?

Postby F-GTUX » Sun Oct 01, 2017 11:24 am

Hello Stuart,
I suggest you add incidence="2" to the vstab attributes, since a yasim vstab is just a non-mirrored wing with a 90° dihedral (and y>0 to the left side). I've just tested it with incidence="5" on a plane that goes strongly to the left then.
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Re: Vstab 2 degress t o the left ?

Postby fmg » Fri Dec 01, 2017 9:29 pm

Hi Stuart,

incidence should do the job on the vstab. But it is wrongly displayed by the Melchior script.

Regards

f-)
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Re: Vstab 2 degress t o the left ?

Postby StuartC » Sat Dec 02, 2017 12:12 am

that explains why it looks wrong
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