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Flybarless Rotor Head Systems > V-stabi and interaction / latency
 
 
Flau
Heliman
Location: Curacao

Hallo,

I like to buy a v-stabi and had some question.
how good is this system really?
A flybar head is like a normal gyro, stabi is a HH gyro!

Say i have a bad eCCPM setup, with at hoover the swash is levell but at full pitch it hangs to the left. Q, will the stabi feel this and levell out the swash so the heli goos straight up?.

There is a lot to do in latency lately so if a servo comes a little bit later will the stabi correct this?

Somethimes at low head rpm a heli start to wobble. The head is still
but the skids goes from left to right, how is stabi reacting on this.

For 80% off the year there is a lot off wind here. (5-5,5 baufore)
will stabi give me a heli that holds his line better than a flybar head in these conditions.

If i make a big loop inverted barkwards than the heli doesn´t come straight out, i have to correct this with roll. Ok, pilot-heli-building exetra has a lot to do here, but in theory the stabi is better?

Thanks Frans.

Oh mother it,s hot here
01-03-2008 12:01 AM
 
 
Heliplanet.de
Senior Heliman
Location: Aidlingen, near Stuttgart, Germany

Quote 
how good is this system really?
A flybar head is like a normal gyro, stabi is a HH gyro!

Not at all ... VStabi si a virtual flybar. That means, the System is designed to emulate the flybar. Of course it can do much more, but it is not only a Rate/HH gyro.

The system works pretty well, i think as best of the systems at the market. I think VStabi is benchmark for the others.


Quote 
Say i have a bad eCCPM setup, with at hoover the swash is levell but at full pitch it hangs to the left. Q, will the stabi feel this and levell out the swash so the heli goos straight up?.

With Vstabi you can trim collective at mid position as well as at the end positions. So you can trim out first at the banch and the rest will do the system in flight.

Quote 
There is a lot to do in latency lately so if a servo comes a little bit later will the stabi correct this?

The latency for the operation in the VSatbi system will not be mentioned. It is about 0,01 sec or so, the latency of your Radio and Servos will be much more! And ... Vstabi will give the inputs to all swash servos simultaneously.

Quote 
Somethimes at low head rpm a heli start to wobble. The head is still
but the skids goes from left to right, how is stabi reacting on this.

You should think over to use other dampeners in this case. Any shaking, wobble or vibrations are unwanted at any kind of helicopters. But my Jet Ranger had some bad vibrations in the past, and VSatbi works well.

Quote 
For 80% off the year there is a lot off wind here. (5-5,5 baufore)
will stabi give me a heli that holds his line better than a flybar head in these conditions.

Yes, definitly. Even wit a Setup using high P values at cyclic. It will fly as "on rails".

Quote 
If i make a big loop inverted barkwards than the heli doesn´t come straight out, i have to correct this with roll. Ok, pilot-heli-building exetra has a lot to do here, but in theory the stabi is better?

I think so.


******************************************************************

For more information have a look at www.vstabi.de and especially the WIKI. We put a lot of information about the system on this website.

Electric Scale - Vario & flybarless V-Bar - Mikado
01-03-2008 05:45 PM
HOMEPAGE  
 
 
Eco8gator
Key Veteran
Location: Palm Beach Gardens, FL

Curious what heli do you fly? If you don't already have a 90 sized heli Id consider that before any stab system if wind is a big factor when you fly.

Ive found that flybarless is great but in the wind the pure power and speed of the lighter lower drag heli makes it harder to fly... Dont get me wrong my disk stay nice and level where ever I put it but when your heli can change altitude as fast as mine it can be a handful in heavy wind.

A 90 sized Logo 600 with a stab system and the gain cranked up sounds like its what your looking for if you want a flybarless heli.

C
01-03-2008 07:20 PM
 
 
Flau
Heliman
Location: Curacao

Thanks heliplanet i will look more at wiki.

Eco8gator, i have a vibe 90 and it handels wind good, but as far i understand stabi give me a lot more.
But this is not the only reason, a vibe is not crash friendly like a Raptor90. In a good crash the centre hub and the hiller arms are olso bend.
Slop in the system is one off the instabillity reasons, and stabi reduse this to a minimum.
I olso gain less wheight and some more power, maybe i can use shorter and lighter mains for longer servo life.

Using a shorter hub brings the CG closer for quicker response and stabi will hendel the lack off stability.

Maintenance is less.

I think a have to buy other main blade holders too because the distance from ball link to spindle is to short.

So there is alot going throu my mind.

Thanks frans.

Oh mother it,s hot here
01-03-2008 08:33 PM
 
 
Flau
Heliman
Location: Curacao

Somethink new!

Wiki says; In fact the Vstabi takes full control over the swashplate mixing you need to program the tx as a mechanical mixer heli or a simple fixedwing plane (e-heli without a throttle curve).

So this means no super expensive MZ142.4 Ghz tx
Just a simple light tx with the basic settings, well i am impressed!

Frans.

Oh mother it,s hot here
01-03-2008 08:49 PM
 
 
Heliplanet.de
Senior Heliman
Location: Aidlingen, near Stuttgart, Germany

Yes. Thats right. (I think i wrote this at the wiki myself)

You can use a simple TX with 4 channels for control, 1 channel for esc and if wanted 1 channel for bank switching at VStabi.

Electric Scale - Vario & flybarless V-Bar - Mikado
01-03-2008 09:06 PM
HOMEPAGE  
 
 
avconslt
Senior Heliman
Location: Houston, Texas

Does VStabi work on multi-blade heads or just 2-blade head? Thanks.

Richard
01-14-2008 01:16 AM
 
 
TJK
Heliman
Location: Waunakee, Wisconsin USA

it will work on multi-blade heads as well

Team Quick UK, Team Wildcat
01-14-2008 02:04 AM
 
 
avconslt
Senior Heliman
Location: Houston, Texas

TJK,

Thats great! Where do you get them and how much do they cost? Do you still use 2 rate gyros with it? How does thus unit compare to the Helitronic mixer? Thanks.

Richard
01-14-2008 02:20 AM
 
 
maxturbine
Senior Heliman
Location: Snohomish,WA

All of your question have been answered in this forum. Go to the Mikado web site and read about v bar.

You can click on helitronic ad and read about this product.

PM if you want to talk on the phone about theses two items.

More than willing to help

Ralph
01-14-2008 03:17 AM
 
 
avconslt
Senior Heliman
Location: Houston, Texas

Thanks Ralph, I might just do that after I go to those two sites and do some research!
01-14-2008 04:50 AM
 
 
NTM
Senior Heliman
Location: Lloydminster, Alberta, Canada

The .90 size logo 6003d might be a bad idea, I found mine to be much less sensitive to the the wind on 600mm blades than on 690mm blades.

The v-bar works wonders in the wind and is the only flybarless system I've seen tunable enough to not display any "quirky" behaviour during hard 3d.
That said it has steep curve to learn how to dial it in.

Regards,
Nathan

Logo 6003d v-bar: actro32-3 max/flightpower 10s 25c 4350mah
01-15-2008 01:50 PM
 
 
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Flybarless Rotor Head Systems > V-stabi and interaction / latency
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