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HomeAircraftHelicopterFlybarless Rotor Head SystemsOther › Fb vs fbl ccpm interaction
05-28-2012 06:40 PM  6 years agoPost 1
steve kra

rrApprentice

palatine illinois

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Is fbl less prone to ccpm servo interaction or poor set in flight compared to a flybar set up. And what about use of sub trims and or travel adjust on radio with fbl. I dont know much about fbl. Thinking about converting over to fbl.

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05-28-2012 08:14 PM  6 years agoPost 2
Ben-T-Spindle

rrProfessor

Central Illinois

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That depends on the brand of controller that you select but they all need to have a good solid mechanical setup to work correctly.

... BTS

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05-29-2012 02:44 AM  6 years agoPost 3
steve 01

rrProfessor

Grand Rapids MI

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If you do not have a properly setup heli the servos will get hot and the heli will drift and not track well. On the beast x there is a step for subtrimming but it is done thru the controller the same goes for most others as well.

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05-29-2012 05:27 AM  6 years agoPost 4
Zaneman007

rrElite Veteran

Texas - USA

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The set up on FBL is different for every system. Even the terminology is different. Some systems use the radio functions more than others. And some systems are easier to set up than
Others.

Either way FB or FBL, set up is important. A poorly set up FBL system can turn into a tip over on spool up. Where as a well
Set up FBL system can be fun to fly on even a windy day.

At the Last fun fly I went to, I saw two FB helis. The rest were FBL.

Old Guys Rule!

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05-29-2012 03:14 PM  6 years agoPost 5
unclejane

rrElite Veteran

santa fe, NM, USA

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Is fbl less prone to ccpm servo interaction or poor set in flight compared to a flybar set up.
A FBL unit can usually compensate for CCPM interactions just by the way it works, but it's not optimal for it to have to do that. Some units have settings that allow you dial those out. The Mikado Vbar, for instance, has settings in the setup menu to dial out interactions at the extremes of travel (i.e. at full or minimum collective, you can dial out a swashplate tilt).

Some units, like the BeastX will actually work ok with things really goofed up in the mechanics - I once had unequal travel setup on the swash on my 700E by accident (balls on inner holes on the AIL/ELE bellcranks, but elevator A arm was on outer holes) and it actually flew fine. No idea how it was dealing with that, but I only discovered my error on the bench later.

But obviously you don't want things messed up to that degree .

So I'd say the constraints are the same - you want it setup right else odd things are likely to happen in the air. So FBL won't relieve you of that .
And what about use of sub trims and or travel adjust on radio with fbl. I dont know much about fbl. Thinking about converting over to fbl.
The main difference there is the CCPM mixing is typically done in the FBL unit itself rather than in the radio software as is the case with flybar. So normally subtrim settings and travel adjustments are handled on the FBL unit rather than in the transmitter. The transmitter typically is setup with an "H-1" heli model (one servo on each of collective, ail and elevator, like in the old days where we used mechanical mixing rather than CCPM) and the FBL does the mixing.

So it's a bit of a departure from what you're familiar with. I would suggest a unit with a good setup or software, like the BeastX or Vbar. The Vbar has far and away the best software of any of the other units and is probably the easiest to setup. It requires a computer, but IMO it would be the gentlest introduction to FBL. Next would be the BeastX, though its setup is a little more arcane at first. But once you get used to it, it's a cinch.

I won't go into the ones that I'd recommend against here. PM me if you're interested in that.

LS

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