RunRyder - VBAR Tail Servo?

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Flybarless Rotor Head Systems > VBAR Tail Servo?

Zaaaguy72
Senior Heliman
Location: Grand Rapids, MN

I finally got my VBAR installed in my Xtreme 50, and holy crap that thing is cool. I was just wondering, I am using a 8900g tail servo but have heard it does not work good with the VBAR tail gyro, why?? I am going to maiden this bird tomorrow but am a little scared to do so with people saying the 8900g makes the tail wag like a doberman at a steak factory!!! Please let me know what to do!

Chris

05-22-2008 07:02 PM

Jag72
Elite Veteran
Location: 20 minutes south of Boston Mass...

No worries ...

Trust me....setup is a Piece O cake!

And besides...you have some good connections to help you out

05-22-2008 07:07 PM

Zaaaguy72
Senior Heliman
Location: Grand Rapids, MN

Sweet, I will be asking questions!

05-22-2008 07:11 PM

inkspot1967
rrProfessor
Location: cranston ri.

yup we will help if needed. my first advice will be double check everything before you fly it , because if its not right it will be a bad day if not

Vibe50 VBar flybarless 12X Radix ATGv3
Next-D Rave
WENZEL CANOPYS
Flybars are for Pussies.

05-22-2008 10:45 PM

jrvander
Senior Heliman
Location: Mystic, CT

Question for the vstabi-savvy public: I just got my new Vbar installed into my Logo 14 and after a few hours of fiddling I think I've got most of the parameters set properly, i.e., all the deflections are correct and the swash tilts to the opposite side when the heli is tilted. The servos are centered pitch is zero at mid stick.

However, I have one major problem that I can't figure out. The throttle and pitch curves are tied together. When in Normal mode wiht a 0-25-50-75-100 curve I get full travel on the swash. as soon as I click it into idle up 100-90-80-90-100 the swash follows the V-shaped throttle curve. I'm missing some crucial function somewhere.

The radio is set to single servo BTW, all sub trim is zero and all ATV's are factory preset. The only trim in the Vbar program is 55 and 55 for tail travel.

Any thoughts?

- Jon

Jerry wins!

05-25-2008 05:34 PM

inkspot1967
rrProfessor
Location: cranston ri.

thats what its supposed to do. are you getting full pitches in idle up or are you saying your not getting full pitch in idle up?

Vibe50 VBar flybarless 12X Radix ATGv3
Next-D Rave
WENZEL CANOPYS
Flybars are for Pussies.

05-25-2008 11:21 PM

jrvander
Senior Heliman
Location: Mystic, CT

Sorry, my explanation wasn't clear. In idle up the pitch is at nearly full positive fro the whole range of the stick from low to high, just as if the throttle curve was the pitch curve.

My throttle curves are as follows:
Normal - 0-25-50-75-100
Idle 1 - 100-90-80-90-100
Idle 2 - 100-95-85-95-100

Pitch curve for all modes is a straight line: 0-25-50-75-100

When I switch to idle up the pitch is max positive at low stick, somewhere around 80% positive at mid stick and max positive at high stick as if it was following the V-curve.

I spent three hours this morning fiddling with it but still can't figure it out. There's some simple function that I've overlooked somewhere but I can't find it.

- Jon

Jerry wins!

05-26-2008 01:22 AM

inkspot1967
rrProfessor
Location: cranston ri.

make there are no throttle program mixes on

Vibe50 VBar flybarless 12X Radix ATGv3
Next-D Rave
WENZEL CANOPYS
Flybars are for Pussies.

05-26-2008 01:37 AM

jrvander
Senior Heliman
Location: Mystic, CT

Thought of that one as well, but no joy there. All program mixes are inhibited.

BTW, I'm using a DX7 with AR7000.

- Jon

Jerry wins!

05-26-2008 01:56 AM

Heliplanet.de
Senior Heliman
Location: Aidlingen, near Stuttgart, Germany

As i wrote to you via pm:

Is it the new AR 7000 with the log feature?

Electric Scale - Vario & flybarless V-Bar - Mikado

05-28-2008 09:30 PM

HOMEPAGE

jaxrotor
Veteran
Location: Jacksonville FL

sounds to me like you have the pitch and the throttle channels crossed.

http://www.jaxrc.com

05-28-2008 09:41 PM

HOMEPAGE

JKos
Elite Veteran
Location: Town of California in the state of Maryland

> sounds to me like you have the pitch and the throttle channels
> crossed.

That's my vote as well.

Plug a servo into your throttle channel and see what it's doing then plug it into your pitch (aux 1) channel and see what it's doing.

- John

Protos -- Logo 14 -- Logo 10

05-28-2008 10:02 PM

jrvander
Senior Heliman
Location: Mystic, CT

Thanks for the help; The throttle channel was indeed in the wrong slot(check out page 9 of the manual, it shows the throttle should be plugged into channel 6) but now I have other issues to solve.

I'm going to swap out the receiver tonight and see if that solves things.

- Jon

Jerry wins!

05-28-2008 10:40 PM

dahld
Senior Heliman
Location: Bakersfield, CA, USA

V-Bar Manual

Don't feel bad about the manual leading you down the wrong path. It kinda threw me for a loop at first too. I found early on in the vstabi forum, that the manual shows the wiring for (don't quote me on this), European/Graupner type radios, which for some unexplainable reason are different than what the Japanese sell us

.

Anyway, the hard part is over. Getting it set-up to fly takes the most work. Now the flying and the fun begins!

Take care, Dave Dahl.

Kyle Dahl (age 15) - Team Mikado
Team A Main Hobbies (amainhobbies.com)

05-29-2008 03:33 AM

jrvander
Senior Heliman
Location: Mystic, CT

I thought it might be something along those lines since the stick modes are different from European transmitters and U.S. (mode 1 vs. mode 2). After alot of trial and error, ALOT of error, I managed to get it straightened out. Today I took it out to test fly and it didn't commit suicide so it must be correct.

One thing however; there's a twitch/oscilation in the tail, pulses back and forth a few inches at the hover but goes away wiht collective input. My leading diagnosis is too much gain in the tail channel so I plan to cut it back a few points. There's also a slight left drift that isn't horrible but annoying, a few click of subtrim in the radio cures most of it.

Very odd sound now without the flybar! I can hear the blades and motor now instead of the paddles.

- Jon

Jerry wins!

05-30-2008 04:24 PM

inkspot1967
rrProfessor
Location: cranston ri.

jon

you never should use trim or subtrims with the vbar, it states it to not use them.

did you do the piro optimization on rudder?

email me your file so i can see how your setup.

synergy_n9@yahoo.com

save file as a .xml

Vibe50 VBar flybarless 12X Radix ATGv3
Next-D Rave
WENZEL CANOPYS
Flybars are for Pussies.

05-30-2008 04:45 PM

Zaaaguy72
Senior Heliman
Location: Grand Rapids, MN

I am finishing up my Xtreme 50 with VBAR and the manual states the factory settings are "appropriate" to get it in the air and see what trimming is needed, is this true, or are there better initial settings?

Chris

06-03-2008 08:13 PM

ArtK
Veteran
Location: San Marcos, Ca

true

just make sure servos are going in the right direction and sensing is on the right direction. Also check you collective travel and cyclic for binding and you should be safe. Start off easy add as little cyclic input as possible, during spool up keep the disk plane level. Best to spool up at slightly negative pitch to apply slight pressure on the skids

I love these things!!!

06-03-2008 08:28 PM

Jag72
Elite Veteran
Location: 20 minutes south of Boston Mass...

vbar setup files

It really is amazing how differently the machine flies by tweaking the file