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HelicopterFlybarless Rotor Head SystemsOther › GAUI Flybarless head
12-09-2008 03:02 AM  8 years agoPost 1
jyzoom

rrApprentice

Singapore

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Hi,

ANyone who have expeerience with GAUI Flybarless head, can you advice if the spoindle, damper have to be from Gaui? Can I re-use those from Trex 500 or Protos ?

Jonathan

Goblin 700, Furion 450, Synergy E6

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12-09-2008 04:09 AM  8 years agoPost 2
marcw

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Southern California

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I just ordered one. It's for a 3mm mainshaft diameter (at least the one I ordered), so that's for the Gaui 200 or Trex 250. I saw that Gaui also makes one for 450 size helis (5mm mainshaft diameter).

The Trex 500 uses an 8mm diameter mainshaft. What most people do who want to go flybarless with the Trex 500 is to buy the Mikado conversion kit.

Marc

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12-09-2008 04:44 AM  8 years agoPost 3
jyzoom

rrApprentice

Singapore

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this one

I am referring to this one.

http://flying-hobby.com/catalog/pro...roducts_id=3884

Jonathan

Goblin 700, Furion 450, Synergy E6

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12-09-2008 04:56 AM  8 years agoPost 4
marcw

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Southern California

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hi Jonathan:

That link shows a rotorhead for "425-550 Size" helis. That kinda does not make sense, because 450 and 500 are two different mainshaft diameters. Contact the seller and find out what diamater mainshaft that head is made for.

Marc

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12-09-2008 02:45 PM  8 years agoPost 5
perfeet

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Oslo, Norway

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"425-550" means the length of the rotor blade in mm.

It fits the T-Rex 500 without any mods.

But I took it of again because I found it had to much movement/slop between the head and the Align main shaft. Did not help much to tighten the jesus bolt more.

Now I use a modified Align Trex 500 head and it is much tighter.

Anyone else have experienced the same problem?

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12-09-2008 02:53 PM  8 years agoPost 6
jyzoom

rrApprentice

Singapore

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Great info

perfeet,

Thanks for the sharing how it fit on the Trex 500 main shaft.

DO you mind sharing with me what is the length of the spindle on the Gaui flybarless head ?

I am trying to figure out if the main grips on the Gaui flybarless can be use on Protos main hub without modification. This will allow me to use the swash follower along with the Gaui main rotor grips to get a more solid flybarless head to use with my Gyrobot.

Jonathan

Goblin 700, Furion 450, Synergy E6

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12-09-2008 09:40 PM  8 years agoPost 7
perfeet

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Oslo, Norway

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Hi jyzoom

The spindle is 61mm long

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12-09-2008 11:04 PM  8 years agoPost 8
jyzoom

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Singapore

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Thanks

Perfeet, thanks again for the information. It is very close to the spindle on Protos which is about 62mm.

Goblin 700, Furion 450, Synergy E6

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12-10-2008 11:07 PM  8 years agoPost 9
jaggededge

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los angeles, ca

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Also:
The G425-550 spindle/feathering shaft has an OD of 5mm.

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12-11-2008 02:30 AM  8 years agoPost 10
Eury

rrProfessor

Dover NH

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I got one of these heads today. It's a nice unit. I got it in a kit with the GU365 unit, and an swash follower. The head dropped right on my 8mm mainshaft Compass Atom, same size as a T-rex 500.

The design is pretty nice, all metal, and the balls are located out from the grips, which makes the geometry work out well. It was preassembled, and all the screws were locktited and tightened down well, and the head was nice and tight on the mainshaft without any of the play that was reported above. The swash follower is standard fare, it clamps down and has a couple arms to hold the swash.

I know that there is a relatively inexpensive conversion for the 500, but for my heli there is none. This is certainly a good option for those who want to convert a 500 sized heli.

Nick Crego

Citizen #0168

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12-11-2008 04:53 AM  8 years agoPost 11
jyzoom

rrApprentice

Singapore

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don't like

I don't own one of this head, but I purchase the follower to use. WIll get mine within these two days. The only thing I don't about the head is the ball is facing out, in extreme cyclic and pitch combination, it might just pop out.

JOnathan

Goblin 700, Furion 450, Synergy E6

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12-11-2008 04:57 AM  8 years agoPost 12
Eury

rrProfessor

Dover NH

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What do you mean? The ball on the grips? That ball have any more range of motion than a ball on a mixing arm on the grip on a flybarred head that is facing out, like so many heads are. They never pop off. With everything maxed out, the link wasn't close to the point where it could pop off the ball. That linkage ball position is pretty standard.

Nick Crego

Citizen #0168

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12-11-2008 03:04 PM  8 years agoPost 13
QueeQueg

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West Texas

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Does anyone know if the smaller TRex 450 sized Gaui head have thrust bearings?

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12-11-2008 03:19 PM  8 years agoPost 14
jyzoom

rrApprentice

Singapore

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Take a look at this

Eury,

If you take a look at the position of the grip and ball link on the trex 500 with extended grip. And also check out the RJX flybarless head in the other post. You should see why I prefer this position.

http://www.rcgroups.com/forums/show...t=799881&page=4

Jonathan

Goblin 700, Furion 450, Synergy E6

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12-11-2008 03:23 PM  8 years agoPost 15
Eury

rrProfessor

Dover NH

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I'm familiar with what you are talking about, I've had a few flybarless helis, including a 600N with the Mikado head which places the link like that as well. What I'm saying is the grip doesn't get to an angle where the link popping off is a possibility. The Gaui head isn't the only one that positions the link this way, and while I prefer the link to be placed in the same position as you do, the reason is aesthetics, not function.

Nick Crego

Citizen #0168

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12-11-2008 03:29 PM  8 years agoPost 16
QueeQueg

rrVeteran

West Texas

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Look at it like this; all swashplates have the ball in that orientation so if the angle gets to be enough to pop off it would come off the swash even if the ball on the grip was at 90*.

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12-11-2008 08:38 PM  8 years agoPost 17
jyzoom

rrApprentice

Singapore

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good point

Eury, QueeQueg,

Good points.

Jonathan

Goblin 700, Furion 450, Synergy E6

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12-15-2008 06:36 PM  8 years agoPost 18
skint eastwood

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uk

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Does anyone know if the smaller TRex 450 sized Gaui head have thrust bearings?

-----------------------------------------------

No it does not it doesnt even have a feathering spindle , the blade grips screw through two radial bearings into each side of the head. I binned mine as it seemed a heap of junk, but on another forum there is a guy raving about it

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12-15-2008 07:06 PM  8 years agoPost 19
Al Austria

rrElite Veteran

Gainesville, FL

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No it does not it doesnt even have a feathering spindle , the blade grips screw through two radial bearings into each side of the head. I binned mine as it seemed a heap of junk, but on another forum there is a guy raving about it
Skint, have you actually flown your Gaui head? Check out my flybarless 450/Gaui setup in this thread: http://www.runryder.com/helicopter/t469336p1/

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12-15-2008 07:26 PM  8 years agoPost 20
QueeQueg

rrVeteran

West Texas

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Thanks Al,

Great video but next time please don't go so easy on that puppy

I can see that thing is a lot more stable than a flybarred 450. And the Gaui head seems like it's got what it takes. Considering that it seems the stiffer the dampening the better the FB systems seem to work Maybe full rigid is coming.

Did you guys catch the 2 objects flying above your field about 1:20 into the video? Maybe the Aliens are getting jelous of that things performance

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