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HomeAircraftHelicopterRobbe Cuatro - Millennium - Nova - Dyna-X › Mixing ratio's on S4814 flybar upgrade
11-09-2005 02:19 PM  12 years agoPost 1
Barney

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Inverness Scotland

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Mixing ratio's on S4814 flybar upgrade combined with the ERC mixing arms

I'm running the above flybar upgrade. What are the best settings for 3D/FAI etc & the reasons..not too techy an awnser please....I know a certain amount of preference comes into it but whats a good starting point...

thanks

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11-14-2005 02:56 PM  12 years agoPost 2
Jarno

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Finland

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Well you could write a book on this subject. I will put it here very very briefly.

Higher the flybar ratio, higher the impact of the flybar on the main blades.

Usually lower flybar ratio helps in gusty wind as the flybar will not have so big correction impact on the main blades. (I mean in F3C hovering)

It is pretty much trial and error to find a combination that will suit you well. It all depends on paddles, blades, flybar lenght etc.

If you're a 3D pilot then do like the manual says and go with the std. settings. I believe they're 1:1 or very close to that.

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11-23-2005 11:50 AM  12 years agoPost 3
invrtd

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Victorville CA

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How do you like the flybar upgrade. Looking at purchasing it myself. I want to get that 1:1 ration. Anyone happen to know what the stock ration is?
Hey Barney I am from Inverness Florida. You should come visit sometime.

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11-24-2005 04:30 PM  12 years agoPost 4
Barney

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Inverness Scotland

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Hi invrtd, I must admit I have not messed about with the settings much. I also added the longer mixing arms at the same time so i can't really give you a totally honest answer.

Sorry can't tell you the ratio either..I hunted through every robbe flyers gallery & posts where it was mentioned without success & just used what others where using going by the photo's,

The reason I added it ? I was told that the flybar can be prone to breaking in flight from fatigue in hard 3D in the air. With the upgrade the heli is still flyable..bet it vibrates like hell though

I,m using the 2nd hole nearest the head

As to the difference, I would say the whole machine felt little bit sharper, I felt I could almost bog the motor a touch with a full and very sudden input of cyclic, I have since added a revmax & lifted my headspeed to 18300 from 17800 and no longer notice the loading. As I said I changed two things at the same time so it could be a bit of both.

I am also running my flybar with 95mm V-paddles with no weights..surprisingly it's not over sensitive (because the paddles have a thick section there not pitchy)

PS I bet the weather is better in your Inverness at the minute!! I'ts snowing here this now..Lol....

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11-29-2005 11:02 PM  12 years agoPost 5
invrtd

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Victorville CA

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No snow here. It was about 25C today.

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12-01-2005 02:05 AM  12 years agoPost 6
Ramster

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NJ

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Flybar Ratio
The old flybar ratio (M1, M2) is 1: .73


.

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12-01-2005 06:47 AM  12 years agoPost 7
Jarno

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Finland

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Thanks for the information.

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12-01-2005 12:32 PM  12 years agoPost 8
invrtd

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Victorville CA

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What ratio are possible with the new flybar system or even the dual hole mixing arms from RCmarket.

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12-01-2005 02:05 PM  12 years agoPost 9
Ramster

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NJ

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The max flybar ratio possible with new cradle S4888 considering all the available bell mixers is 1: .86

.

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12-01-2005 02:29 PM  12 years agoPost 10
invrtd

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Victorville CA

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Anyone have idea on how to get a 1:1 ratio?

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12-01-2005 02:37 PM  12 years agoPost 11
Ramster

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NJ

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Get A Raptor..........

1:1 ratio is not going to happen with any of the stock Robbe mixing arms.


.

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12-01-2005 03:12 PM  12 years agoPost 12
invrtd

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Victorville CA

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Don't want a Craptor, just want to improve 3D perfromance. Though my Nova does 3D pretty good already.

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12-01-2005 06:04 PM  12 years agoPost 13
Barney

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Inverness Scotland

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Hi invrtd...I also have the RC market mixing arms which give an increase of roughly extra 1 deg pos & 1 deg negative pitch. The cyclic goes up about a degree each way too.. the small (upper mixing arms also have 2 positions on the arms..same as the longer pitch arms

The standard Millie upper arms appear to be symetrical.. I have an odd robbe pair which I think come from a Millie 3 which are actually offset & must be fitted the correct way round to clear the rotor head

There was a thread somewhere where I think bigbuster commented that he could almost break flybars at will if you use the innermost hole! and settled for the mid position on the flybar carrier

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HomeAircraftHelicopterRobbe Cuatro - Millennium - Nova - Dyna-X › Mixing ratio's on S4814 flybar upgrade
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