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Scorpion Power Scorpion Power
HelicopterFlybarless Rotor Head SystemsOther › Can I convert a flybar head to flybarless?
12-02-2011 01:49 PM  5 years agoPost 21
Blackhawk6

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Livonia, Mi

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Great, I'll check it out and see what I can do. Thanks!

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12-02-2011 04:33 PM  5 years agoPost 22
Melnic

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Columbia, MD,USA

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I did the skookum method on my 450 once and it was a colossal waste of time and effort. Later got a Gaui head. Much tighter, less slop.
Your conversion looks pretty clean.
Just keep in mind that flybarless needs things to be tight and slop free for best results. When you take that grip arm and extend it out, that plastic can twist. If you are scale flying you may just be ok.

Did you grind a flat on the shaft so the set screw does not slip? If that starts to slip, the timing will be off and it will not act as desired.

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12-02-2011 05:09 PM  5 years agoPost 23
jackheli

rrProfessor

Vancouver - Canada

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Thanks for all the feedback guys.

Yes, plastic is definitely NOT the way to go on FBL. Neither is the follower as CX1 pointed out the range on the swash IS pretty limited.

Just want to explain exactly what this is for: I am in the process of building a 5 bladed Hughes 500 for which I have the metal head, etc.

I want to try the FBL command module first with a two bladed head and make the mechanics fly without the 5 times hassle.

So this is a completely temporary solution in order to prevent having to purchase a metal head just for a couple of flights.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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01-03-2012 04:38 AM  5 years agoPost 24
jackheli

rrProfessor

Vancouver - Canada

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Flew the head this weekend. It flew!

The setup was a little pitchy since the dampers and the head overall are VERY soft (guess they are meant for a newbie flying with a flybar). I recall seeing an upgrade that would stiffen the plastic head/spindle. For FBL the stiffer the head the better... Other than that it was great and I had lots of fun with it.

I decided not to lock the follower to the mast, so it would run freely on the washout guides. With that setup I got +/- 14 collective and +/-10 cyclic easy...

I am very satisfied on how the project is moving along...

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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01-03-2012 11:00 AM  5 years agoPost 25
GetToDaChopper

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Las Vegas , NV

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i think what CX1 is saying that the washout arms are too short and i agree, they need to be much longer and then you flip the washout base upside down and then lock it as high up on the main shaft as possable, right next to the head, in that way the swash will be able to move up and down all you would need and still give you no binding of the washout driver arms to swash just like the driver in jackhelis pic.

the head geometry looks to be good just take care of the swash drive and you'll be good to go !

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01-03-2012 05:20 PM  5 years agoPost 26
JasonJ

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North Idaho

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I want to try the FBL command module first with a two bladed head and make the mechanics fly without the 5 times hassle.
I have the feeling you'll still have to go through all the setup stuff again when you put the 5 blade head on. I can't imagine the settings that work with the 2 blade homebrew head would work with the 5 blade head so you'll still have to get the mechanics flying good before putting it in the fuse. Other concern I have is it looks like the "follower" is plastic. The set screw can only have so much torque on it before the plastic strips out and the follower moves. It won't turn because of the pins but if it slipped up or down in flight it might bind things up. I know, it's temporary.

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01-03-2012 07:49 PM  5 years agoPost 27
jackheli

rrProfessor

Vancouver - Canada

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i think what CX1 is saying that the washout arms are too short
The set screw can only have so much torque on it before the plastic strips out and the follower moves
The plastic sleeve has a brass insert where the set screw threads into.

But as I said I decided NOT to lock the follower to the mast and let it slide up and down on the washout guides. That gave me full range on collective and cyclic independently of the size of the arms. Worked flawlessly.
you'll still have to go through all the setup stuff again when you put the 5 blade head on
Yes, I know. I just wanted to test the FBL command module and the power train. In that regard the step was an outstanding success

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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01-04-2012 12:26 AM  5 years agoPost 28
GetToDaChopper

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Las Vegas , NV

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But as I said I decided NOT to lock the follower to the mast and let it slide up and down on the washout guides. That gave me full range on collective and cyclic independently of the size of the arms. Worked flawlessly.
thats ok as long as you understand that the reason it's working is as you move the collective fully up the washout arms will move to the point of binding on the swash balls only then will it push the washout base up the washout guides and the same is true going fully down now add to that a high degree of swash tilt and who knows if the washout arms will pop off the swash balls at some point ? i wouldn't call that "flawlessly" myself but thats just me.....

it will more than likely work just fine i just wouldn't tilt the swash very much if i was you.....

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01-04-2012 06:17 PM  5 years agoPost 29
jackheli

rrProfessor

Vancouver - Canada

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and who knows if the washout arms will pop off the swash balls
I know. I checked for binding on all extremes and it works fine.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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