Post you VBar setups, notes & screenshots here! :D

[OICU812]

If you wish to share your VBar setups, screenshots, techniques and notes, this will be the place to share them. Any and all comments will be welcomed. Since the Vbar is growing to be so popular it was felt this would be a good idea for current and future refereces. Thank you! :D

[Daniel Jetschin]

Cool thread mate :lol: Maybe I will share :hug:

[Lorents]

Hello

Now that I have had some time to play with my L10 vbar I'll post my setup that I am really happy with:

- Logo 10 3D
- Kontronik Tango 45-10 - 14t .7 pinion
- Kontronik Jazz 80
- DX7 - AR7000
- 9650's on cyclic - 9254 tail
- Vbar - preasure sencor not installed
- UBEC
- Mikado/BBT 500 mm blades - +- 14 deg collective
- SAB 92 tails
- .7 main gear
- Two sets of the hardest dampeners (need 3 O-rings on each side)
- Thrust bearing upgrade on the tail

In addition I have the novaman CF frames, Mikado CF boom and Mikado open tail gear box - mostly motivated by aesthetic reasons I guess :)

There is one thing that I have bugged me with this setup and that is the tail kicking every now and then causing a hard oscilation (you can see it in this video http://www.lojal.no/userfiles/Logo_10_vbar_2.wmv ). At first I thought it was the gain that was set too high, but then I realized that the kicking had nothing to do with how much the tail was loaded. Since I had covered the belt in graphite to eliminate static discharges it took me a while before I realized (thanks to a post in the vstabi forum) that it still could be static discharges. I grounded the gear box to the boom, and the boom to the frames the problem was gone and it has been smoooooooooth ever since :D

Next issue was a nodding during pitch reversal manouvres like tic-tocs. I had read somewhere that the dampening on flybarless heads should not be too stiff, so I was a bit reluctant to try harder O-rings but tried them anyway and they really work well so I recomend the stiffest ones for hard 3d flying.

Flying with a 6S 3700 EVO pack would tend to strip out the original 200t main gear, but upgrading to the beefier .7 gear and a 14t pinion (MIK03001, MIK03000 and MIK03014) solved that.

Last thing to get it perfect was to install slightly larger tail blades. The 30 size tail blades would work ok but would lack some hold in piro stuff. I picked up som SAB 92 mm's at the LHS and after turning down the gain a bit the tail holds much better.

As for the Vbar software I havent done much there. Just set up the swash, servo directions, trimmed it as per the manual and reduced the gain to match the larger tail blades. I have downloaded the latest firmware and bumped up the "collective bouncer" a bit.

Now I have a fantastic trainer for 3D flying! It easy to transport around, durable, very quiet, smooth, stable, agile and powerful - it feels much like a 90 size in the air. It tracks extreemly well and I can do huge hurricanes and close to full pitch rainbows that spans over the whole field :D I even competed with it in 3dx Norway since my L14 wasnt finished.

I can get 6 minutes of hard 3d if it is mainly pumping stuff, but will go down to 5 1/2 minutes if it is windy or I plan to do a lot of funnels/hurricanes and rainbows that keeps a constant load on the motor.

Only thing that bugs me now is that the links from the swash to main blade holders will wear out the delrin swash guide ears after a while. Have a graupner swash driver on order to see if it is possible to do something about that.

Edit: A couple videos:

First with a vintage 6S 15C TP pack:
http://www.lojal.no/userfiles/L10_Vbar_15C.wmv

and another with a EVO pack:
http://www.lojal.no/userfiles/L10_Vbar_20C.wmv

Will order a new vbar for my Logo 14 now...

[dallasfreak]

nice set up looks like a killer

[flypilot]

Just wanted to share my 5s setup just converted to v-stabi yesterday.

- Logo 500 3D
- 5s 3700mah Hyperion VX batteries
- z20 - 1470Kv with 18pinion
- Hyperion 90A
- DX7 - AR6200
- 9451 on cyclic, Logictech 6200T on tail
- Vbar - pressure censor not installed
- UBEC
- RCP 500mm carbon blades- +- 13 deg collective
- Trex 600 carbon 85mm on tail
- Two sets of the hardest dampeners (need 3 O-rings on each side)

Just started flying this setup today but I have high hopes for this heli, just need to tweek it some more to get it to behave the way I like it...
I noticed quite a bit more bite on cyclic commads as compared to normal flybar heli, need to reduce my throws hehe, also it was not bogging nearly as much during manouvering.

[th3tick]

One construction note I've run into: the V-Bar wiring information in the manual is wrong for the JR/Graupner diagram for step 7 on page 9. It shows the ESC plugged into the collective, and the collective from the V-Bar unit plugged into the throttle. Those are reversed, and you need to have the ESC in channel 1 of the receiver, and the Collective line from the V-Bar unit plugged into channel 6 of the receiver.

John

[Flybar-less]

I would like to confirm some basic VBar settings with a JR 9303 2.4, 8717 cyclic servos, and a 8900G tail servo.

TX settings: swash type = 1servo norm
aileron reversed

Vstabi: Swash servos digital 7ms (144 Hz) Hz is seperately changeable
How many Hz for 8717?
How many Hz for 8900G?

I don't know the frame rate for either servo.
The only way I could get the Tx inputs to correspond with the Vstabi Live screen and actual swash movement was to reverse aileron in the TX.
Is this what others have had to do?

[th3tick]

On my DX7, I ended up with 2 (AILE) and 4 (RUDD) reversed to get it to work right.

I've tried both the 7ms and 12ms, and really seen no difference, although I'm on different servos.

John

[Doug101]

In a 600 thread on RCG I noticed one person using 7ms (144Hz) for 8717 cyclic and 333Hz for 8900 on rudder. So those would be a good start.
Doug

[Flybar-less]

How about allowing posting .XML files?