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Other › Gaui 365 flybarless help,,,,,
01-13-2009 06:42 PM  9 years agoPost 41
reiserrob2003

rrVeteran

Brockton, MA.

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according to Gaui, the AFRs serve two functions, first before initializing the unit it is used to set aileron and elevator travel (the tilting limits of the swashplate) after initializing the unit the AFRs are used for setting roll and flip rate. So for example, you're setup 60,60,60. then you initialize the unit, you can then reduce ail and ele to say, 50,50,60 and that will slow the roll and flip rate. That is my interpretation, my only question is people suggest 1 o'clock position for the gains, that seems more like 80-90% to me, is that correct, please elaborate in percentage and not position, as I feel there may be some differences between units.

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01-13-2009 08:04 PM  9 years agoPost 42
rotorhead58d

rrApprentice

Hamburg, PA...USA

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i started out with my swash afr's set to 25, 25, 50. my gains were turned fully counter clockwise, then 1/4 turn clockwise. this is on a gaui 200 V2 FES. i do not have any flights in yet, but i did test hover it and it picked up smooth. i also had to lower the tail gyro gain in my rx to 60. tuning it should be the fun part because of how simple the layout is.

i did a short video on set up for the GU365. let me know what you think. i have almost no feedback, but that might be a good thing.

from what i understand about flybarless heli's, you don't want the swash to "move" as much as it did with the flybar. that is why i think they tell you to decrease your aileron/elevator to 50% of the value that it was with the flybar. and as you say, use the swash afr's to tune the flip/roll rate. there is not much to figure out about the 365. you just need to educate yourself about flybarless, and how it works. the rest should come from your experience as a heli fanatic

http://www.vimeo.com/2828314

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01-13-2009 08:45 PM  9 years agoPost 43
reiserrob2003

rrVeteran

Brockton, MA.

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yeah, its fun learning a whole new aspect about this hobby and I'm sure like 2.4ghz, its here to stay and will only become more popular and affordable.

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01-14-2009 12:21 AM  9 years agoPost 44
Buzzkill2

rrNovice

Chicago IL

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I'm very happy with mine. I'd like to have a $400-$500 dollar high end unit but, heck I can get a V2 RTF with the GU-365 for that kind of $$.

Gaui. Good people, Great helis.

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01-15-2009 03:39 AM  9 years agoPost 45
reiserrob2003

rrVeteran

Brockton, MA.

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I'm actually going to turn my Raptor 50 Titan into an MD500 scale complete with scale head and three axis gyro this winter and thought this Gaui unit would be the perfect introduction to flybarless, I think I'm going to try the Mikado when I build my 50 though

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01-16-2009 12:12 AM  9 years agoPost 46
ActionAP

rrApprentice

Brisbane, Queensland

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I just installed the 365 in a t rex 450 (my first attempt into flybarless) I keep hearing to reduce the aileron/elivator throws in your TX so the swash doesn't move as far. This makes sence but I have extended the blade pitch control arms away from the main shaft as to reduce the effect from the swash.

Do I still need to reduce my swash throw in the TX?

At the end of the day all control is achieved by main blade pitch via the swash plate so if I ensure the pitch range is similar to a flybard heli (+ - 10) either mechanicaly(extend pitch control arms) or digitaly(reduce servo throws in TX) is this everything needed for it to fly?

Cheers
Dan

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01-16-2009 12:36 AM  9 years agoPost 47
rotorhead58d

rrApprentice

Hamburg, PA...USA

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try starting out with a lower number on ail, and elev, then gradually increase it. i like mine lower, but my skills are that of a moose.

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01-16-2009 03:39 AM  9 years agoPost 48
robl45

rrKey Veteran

Deerfield Beach, FL

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its very simple really, just measure your pitch with a pitch gauge. Then you will know where to set your limits. If you measure cyclic and elevator pitch and you are getting crazy numbers like +15, you need to lower it, if you are getting +3, you want to raise it.

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01-16-2009 06:28 AM  9 years agoPost 49
ActionAP

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Brisbane, Queensland

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ok sounds good but can I just as easily set the correct pitch range mechanically by extending the blade pitch controll arms? and not changing anything in the TX? This should be doing the same thing as limiting the servo throws digitally except I keep the resolution.

Is limiting the servo throws what is meant by adjusting the Swash AFR?

Basically I want to know if I can change nothing in mt TX as long as I ensure the proper pitch throws on the main blade.
Thanks
Dan

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01-17-2009 01:37 AM  9 years agoPost 50
reiserrob2003

rrVeteran

Brockton, MA.

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I read the instructions again, it says to set swashplate AFRs to desired amount just as you would without the Gaui unit, then after initializing said unit with original AFRs, lower the afrs to about half and adjust to suit individual taste, and the instructions say "it will remember the original AFRS, so, my first statement was correct, set AFRs (swash limits), then initialize the unit, limits are set, then adjust AFRs to appx. half original value, this will so the flip and roll rate without reducing original set travel. Then adjust accordingly to suit taste without reinitializing.

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01-17-2009 02:15 AM  9 years agoPost 51
robl45

rrKey Veteran

Deerfield Beach, FL

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think about what you are saying, set the AFR's to desired amount without the gaui unit. fine, on a flybarless bird with direct linkages, you would set it for about the same pitch as with a flybar, problem is, without mixing arms and such, you will be lowering the swash afrs way down. You would not half them after that unless you really want the bird to move slow.

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01-17-2009 02:56 AM  9 years agoPost 52
Eury

rrProfessor

Dover NH

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You would not half them after that unless you really want the bird to move slow.
That's the point. The response is faster with a flybarless unit, so they have you go low for the test flight and then move it up to your liking. This is just like a tail gyro, your AFRs have nothing to do with the travel, they only tell the unit how fast you want the cyclics. They have you start low so you dont' surprise yourself and kill the heli.

Nick Crego

Citizen #0168

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01-17-2009 04:52 AM  9 years agoPost 53
Buzzkill2

rrNovice

Chicago IL

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On a Gaui 200 with the GU-365, if you leave the swash mix the same as a flybared Gaui 200 your cyclic is going to be insanely fast. I know, I have one like that.

When you reduce the settings to about half of normal (excet the pitch) on a Gaui 200 it will react or behave very similar to it's flybarred counterpart. A swash-mix of 25,25,50 is pretty darn close to a flybarred 200 for me.

I set the pitch for 50 and then use the pitch curve to set the pitch. Some guys do it differently when similar results.

Reducing the aileron and elevator swash mix by half will not result in slow cyclic reactions.

Gaui. Good people, Great helis.

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01-17-2009 05:26 AM  9 years agoPost 54
robl45

rrKey Veteran

Deerfield Beach, FL

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right, i'm saying you have to start lower to begin with because you aren't using mixing arms. The way the poster described was to use the same settings for a flybarred machine which will result in crazy amounts of pitch all around.

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01-17-2009 05:58 AM  9 years agoPost 55
rotorhead58d

rrApprentice

Hamburg, PA...USA

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no robl, the 365 reduces it for you. when you set it up initially, you are telling it the servo travel.

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01-29-2009 03:51 PM  9 years agoPost 56
ChristianM

rrVeteran

Oslo, Norway

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This is a very interesting thread to me since I am considering converting my Trex 450 to flybarless. I am thinking of getting the Gaui 450 Class EFS Flybarless Conversion Kit that include the electronic unit and the FBL head. However I am very curious how the GU-365 handles piro moves. As I understand it this is a weak point for many FBL units since there is a time lag between a "disturbance" is detected and the system (including the servos) can compensate. If the heli is pirouetting then there is a phase error which the unit will then have to correct for again and then again and so on.

So the questions:
  1. Any here have any experience with the GU 365 in this regard?
  2. Does anyone here know how the GU 365 compares to the SK360 digital flybar unit?
  3. Eury, you mentioned that you were going to do a large post with pics and a real review. How's the progress on that? I am very curious about your experience with it.
SETUP
From reading other posts on flybarless systems, I though I would share a point that not been mentioned here and that it cyclic pitch. When seting up a flybarless system you need more cyclic pitch than for a system with a flybar. I see 9 to 10 degrees typically being recommended. The reason for that is that in fast forward flight the flybar will add quite a bit of forward cyclic to maintain level flight. There are several pilots that have experienced that the heli balloons up as a result of running out of cyclic pitch. Something to consider when you are doing the mechanical setup.

Christian

Burn fuel, be happy

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01-29-2009 04:30 PM  9 years agoPost 57
Jag72

rrProfessor

South of Boston

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Gaui Unit..
I have been asking around for some videos of hard 3d with this unit for a while and have yet to see much of anything really..

I know that Kyle Stacy has a couple of videos...but that seems to be it...

If this system really works then we should be seeing a lot of videos of it by "normal" pilots...

I ask also because I have a couple of people here locally using them without ANY luck...nothing but CRASHES..

I think they are wondering what the Magic fix is...the unit seems to work in hovering and circuits..but when 3d ing it crashes the heli..they are also using the Spartan Gyros on them..

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01-29-2009 04:36 PM  9 years agoPost 58
Eury

rrProfessor

Dover NH

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I wrote a long post a while back, I think it's entitled "Budget 450 conversion".

The 365 works well for me. I do not fly hard 3d, but what I do it handles fine. I detailed it all in that post. It's not as good as a Vbar or Sk360, but it does work well and the price makes it a good deal for me. Check out that post for details.

Nick Crego

Citizen #0168

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01-29-2009 04:40 PM  9 years agoPost 59
red_z06

rrProfessor

Dumont, NJ

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Link would be nice.

www.JustinJee.com

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01-29-2009 04:47 PM  9 years agoPost 60
rstacy

rrElite Veteran

Rochester, NY

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