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CanoMod . A Main Hobbies . Boca Bearings

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Flybarless Rotor Head Systems > Everything about Flybarless Heads
 
 
Eddi E. aus G.
Senior Heliman
Location: Gerlingen. Germany.

Hi helimen!

I'd like to collect as much information as possible about flybarless rotorheads -- systems, manufacturers, experiences (good AND bad ones), anything you'd like to contribute... who starts?

Well, ok, I'll do: last summer I re-started my hobby after about 10 years of not flying any rotary wing with a (electric - for those who don't know) Silence from VARIO, which ships with a flybarless head.
Although most "heliflyers" say they're most difficult or at least tricky to fly I find the machine perfectly stable in hover and slow FF. Ok, the Silence gets quite lively when hovering in windy weather conditions, but that's it.

I'm not yet into fast FF, and since I'm more into scale flyin' than 3D I think I'll stick to the flybarless head. Simpler mechanics, much lighter, not that much parts to replace in case of "unintentional landing".


The Silence "out of the box"


The Silence built into a Hughes 500 D

Born to fly. Forced to work.
04-20-2003 Over year old.
HOMEPAGE  
 
 
OnceALegend
Heliman
Location: Santa Barbara, CA

I had a GMP Legend back in the 80's and put the flybarless head on it.

GMP had claimed it was docile as anything. Well this provided to be true as long as the power was hover to about 60%.

Any radial power change resulted in a very violent pitch down. At the time I was a fairly simple flyer. Did mainly hovering and forward flight but little if any aerobatics.

I wrote about this in the crashes section but one day I decided to show off to a bunch of non-flyers. I picked my Legend up into a hover and after it was stable I punched in full collective and pushed in some nose forward to do a radical takeoff.

Well the result was that my Legend went up about 5 feet took off and pitched VERY VIOLENTLY forward and dug about a 12" hole in the ground even though I very quickly had added back cyclic.

The thing I loved about the flybarless head was the ease of setup. Only one thing to balance. It was simple and easy to mount was well. Less push rods.

Anyway, that's my story. I wish I understood why they flybarless head was so much more unstable. I don't have that much aeronautics. I am a rated full size helicopter pilot and I trained in the Robinson. No fly bar there but we also didn't do very radical stuff in that bird seeing as we were in it.

M
04-20-2003 Over year old.
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GM1
Elite Veteran
Location: Tallahassee, Florida US

How well I remember

I had a flybarless GMP Legend head also and found you could get it into forward flight pretty easily and it would go fast without problem BUT any dramatic pitch change turned it into an uncontrolled missile. I was in FFF and pulled the nose up slightly and went to negative pitch, no cyclic. It did a complete forward flip on it's own with no cyclic input from me and came out flying straight and level. I assumed I had taken a massive radio hit and landed immediately to check it out but could find nothing. After some experimentation, I found I could duplicate the maneuver everytime and it did look cool as 3D was in its infancy and radical maneuvers were not very common. I was always afraid it would do something when I was too low to recover so I abandoned the head and went back to the Competitor head I had been flying.
Gordie

On a dog sled team, if you're not the lead dog, the view never changes.
04-20-2003 Over year old.
 
 
Doug
Elite Veteran
Location: Naples Florida....

I had (have) a Revolution 60 with both heads. One of the problems in the old days was blades. I would take Kavan Jet Ranger (fat blades) and drill two holes in the leading edge near the tip to accomidate two "flattened" 50 cal lead balls. (I also tracked the blades by holding the tail in hover. As GM1 said it could so some good stuf all by itself

First member of Member of Bearings Anonymous
04-21-2003 Over year old.
 
 
Eddi E. aus G.
Senior Heliman
Location: Gerlingen. Germany.

Maybe the main prob are (where then) the swashplate servos. I've heard they have to be stronger for flybarless since they've to do all the work, no mechanical aid by the flybar -- wich makes sense to me.

Born to fly. Forced to work.
05-28-2003 Over year old.
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DenisS
Veteran
Location: Essex, UK
I have been flying this Schluter BK117 with a four blade head and wooden blades for a few years now, almost like a flybar model. I have seen this setup rolled and looped but haven't done that myself. CCPM servo setup with Futaba 131's. I have owned a Kavan Jet Ranger with the flybarless head. also fly nicely but I wasn't too adventurous with it. I have just given a KKK Robinson to Sean Brown. I converted that to CCPM. It came as standard with a very scale flybarless head and when setup properly flies really well. A couple of traits to get used to but nothing scary. I have flown a Shuttle with a three blade flybarless head, very stable and I have also flown the Hirobo Vertol, twin three blade head. Very nice to fly. All you have to do is get used to a slightly different flying technique but taken gently they are not difficult to fly at all.
05-28-2003 Over year old.
 
 
Dr.Tim
Key Veteran
Location: Mojave Desert

Scale Huey Head

I did a Write Up at www.littlerotors.com on this Flybarless Head. The Huey was Rock solid on 775mm Blades but for some reason I had a Little problem with 800's .... Check it out under "Learning to fly the Flybarless Head" I even put the Radio setup there for the 10x.
Enjoy


Dr.Tim

From Simple minds come simple ideas! Starwood Models, Approach Engineering
05-28-2003 Over year old.
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its-a-trick
Senior Heliman
Location: Cymru

Tim,
I thought the huey had a flybar but no paddles just wieghts
HAPPY FLYING
05-28-2003 Over year old.
 
 
Dr.Tim
Key Veteran
Location: Mojave Desert

Thats True But,

The Weights on the end of the Little Flybar do Very Little. They Do help Dampen but, Not Much ..... Maybe 1 degree at most.

Dr.Tim

From Simple minds come simple ideas! Starwood Models, Approach Engineering
05-28-2003 Over year old.
HOMEPAGE  
 
 
Eddi E. aus G.
Senior Heliman
Location: Gerlingen. Germany.

Dr. T, nice Write-up on littlerotors.com!
For me it was first planks, then flybar which I quit 10 years before (Kalt Baron Whisper, nice toy but a bitch to keep in a steady hover), then long time nothing but a few flights with my hlg ... and since last summer the VARIO Silence.
Setup was pretty easy, as others said: not much linkage to fiddle with and perfectly balanced VARIO blades.
But for my ship I had to limit the servos and/or pitch to keep the swashplate within it's working range AND I definitely need ~20% expo to make the head manageable.
Therewith it's almost rock-solid in a hover, just gusty wind can be a pain in the a$$. Maybe the semi-flybar on the Huey would also do fine for my rotorhead ... but I think it would make people laugh if they saw it on my Hughes -- even the 2 bladed head is not very scale on that ship.
Anyway, when putting the mechanics into my Hughes 500 D, I had to change almost nothing but a littel trim.
The most challenging part (besides learning to fly helis again) was programming my MC 16 (Graupner/JR) *without* manual.
Took some time of try'n'error but it's only a computer programmed by humans after all, I knew what I wanted it to do and it finally did.
Next thing to get is maybe a TX with such a nice display that speaks one's language and not only cryptos like FN8E: -82 and so on


Born to fly. Forced to work.
05-29-2003 Over year old.
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