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HelicopterFlybarless Rotor Head SystemsV-Bar › vbar acts like elevator is being applied during ail tictocs.
05-31-2010 08:54 AM  7 years agoPost 1
cd5

rrApprentice

penrith,Australia

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I have a vbar on a raptor 90(mech mixing) with gforce fbl head conversion but it has an annoying trait.I fly mode 1 so when i do aileron tictocs i am only really using 1 stick so the interaction cannont be from a wayward thumb as ive done it with my finger off the stick to eliminate this.
What the heli does is slowly rotates the nose as if elevator is being applied, and therfore needs constant correction. I have increased the main rotor gain to the point of a slight wag and back, but this did not affect the issue.I can tic toc all my other helis all day long and the heli does not move, so this is quite annoying.

Will running the optimiser sort this out? or is their something else i need to do .The cg is also good.
Thanx for any help
Cheers
Simon

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05-31-2010 09:18 AM  7 years agoPost 2
MrMel

rrProfessor

Gotland

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Phasing is wrong, either mechanical or sensor misalignment

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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05-31-2010 09:27 AM  7 years agoPost 3
Flexis

rrApprentice

Westerlo-Belgium

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It's also possible that you have too much pitch or cyclic compensation making your tail go left on each pitch reversal.

Also, I'm agains the autotrim, it might be ok for beginners but when 3D'ing I've found it works the best if you clear the autotrim and use a swash level tool to level your swash at 0 pitch and then also finetune full positive and negative pitch in the expert menu.

And like Mr.Mel said, it could also be your pahsing is off.

RJX X-treme 50EP 12s
Hovering is for planks

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05-31-2010 12:51 PM  7 years agoPost 4
THX1138

rrElite Veteran

Camp Bondsteel, Kosovo

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I was just about to post on the same thing. I will have to look in to this a little more.

Lou

Just give me five dudes and two flashbangs...

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06-09-2010 03:54 AM  7 years agoPost 5
thenewguy

rrElite Veteran

Corvallis, Oregon Where there is liquid sunshine!

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I think I have the same issue. If I do a sideways tic toc with the nose to my right and tail point left. As soon as I do the first tic toc the boom has a elevator input bringing the boom closer to me. It's like a slight forward elevator input. At first I thought it was my Synergy swash setup being off.

Mr Mel can you enlighten us on how or what to look at to fix this issue?

Thanks Chris

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06-09-2010 06:16 AM  7 years agoPost 6
MrMel

rrProfessor

Gotland

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Phasing is,

either your sensor not mounted straight
or your head/swashdriver not mounted straight

i.e. elevator vs aileron interaction.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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06-09-2010 12:45 PM  7 years agoPost 7
puma1824

rrVeteran

Maryland, USA

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Phasing is,

either your sensor not mounted straight
or your head/swashdriver not mounted straight

i.e. elevator vs aileron interaction.
+1

Check your *phasing using the method MrMel shows in is Vbar 101 videos (view from the top)
*With the GForce head the swashdriver will be slightly twisted to get 0 delta

Watch at YouTube

Mount your sensor using the method MrMel shows in is Vbar 101 videos (using Lego)

Watch at YouTube

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