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HelicopterBeginners Corner › Flybar vs. Flybarless?
09-04-2009 12:45 AM  8 years agoPost 1
Maverick3n1

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San Diego, CA

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What are the advantages and disadvantages? Do you get more or less power from a flybarless setup? From what I understand, the flybar helps for stability, give you better cyclic control, and maintains power, so why go flybarless? How do you decide if you want more or less weight in your flybar paddles, and wether you want them shorter or longer?

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09-04-2009 01:18 AM  8 years agoPost 2
eggmcmuffinplz

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the flybar helps for stability
Thats what the 2-axis system is for. From what I read, it actually improves upon the flybar, and the heli tracks even straighter. There is less energy lost in all of the moving parts of a flybar head, and you can achieve a lot more, even at a lower headspeed with something like v-bar.

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09-04-2009 01:26 PM  8 years agoPost 3
BarracudaHockey

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Jacksonville FL

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There's less inertia in the rotor system to over come so you can do more voilent 3D, without loosing the stablility that the flybar provides.

The rotor head is simpler but the electronics are more complicated.

And its cool

Andy
AMA 77227
http://www.jaxrc.com

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09-04-2009 08:22 PM  8 years agoPost 4
Git

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Brunei

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do correct me if im wrong.
What are the advantages and disadvantages?
adv: very level and straight flight, less affected by wind, less component to replace/clean hence lighter and most noticable is how fast and less bog fbl helis are. plus u dont need to buy paddles and flybar anymore.

dis: price, tuning and once u go fbl, u want all ur helis to be fbl
Do you get more or less power from a flybarless setup?
more due to less drag, weight and other forces generated by paddles.
From what I understand, the flybar helps for stability, give you better cyclic control, and maintains power, so why go flybarless?
the gyro will do all the stabilizing for u.. like the skookum it does it via sensing movement. so when u input stick for forward flight, it tells the gyro to move in the forward direction. it will control the pitch (which is link direct to swash) to maintain that direction until u tell it to do otherwise. so u will see a crazy swash movement not only tilting down.. hence hi speed and torque servos plays a big role. i dont know how flybar maintain power though.. i though power is maintained by the engine
How do you decide if you want more or less weight in your flybar paddles, and wether you want them shorter or longer?
in skookum.. u set the bell and hiller gains.. bell controls how quick u want ur cyclics ie length and paddle weight.. hiller gives u the feeling of lighter or heavier blades.. or something like that.

the feeling is different.. u shud give it a go. its the best upgrade i ever done. i was very sceptical at first but now i regret y i didnt upgrade sooner.. couldve saved $ from buying 611 and spartan by buying the vbar.

Alees Rush 750

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09-05-2009 01:27 AM  8 years agoPost 5
Maverick3n1

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San Diego, CA

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So if you go flybarless, than you need to add a gyro for your forward/aft movement as well as your left and right? So you'll be running 3 seperate gyros instead of 1? Or is there actually a gyro specifically for flybarless setup that covers 2 axis'?

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09-05-2009 01:43 AM  8 years agoPost 6
eggmcmuffinplz

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The Miikado v-bar is a three axis. The gyro is one unit.

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09-05-2009 03:31 AM  8 years agoPost 7
BarracudaHockey

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Jacksonville FL

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Depends on the unit you get, VBar covers all 3, the CSM needs two gyros and a separate tail gyro.

Andy
AMA 77227
http://www.jaxrc.com

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09-05-2009 06:37 AM  8 years agoPost 8
Git

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Brunei

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So if you go flybarless, than you need to add a gyro for your forward/aft movement as well as your left and right? So you'll be running 3 seperate gyros instead of 1? Or is there actually a gyro specifically for flybarless setup that covers 2 axis'?
yes. 2axis eg is skookum sk360. u plug ur cyclics into them b4 going to the rx.

wit 3axis like vbar, u dont need a tail gyro. so u plug ur tail servo into it as well.

Alees Rush 750

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09-05-2009 02:52 PM  8 years agoPost 9
rotormonkey

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Ottawa, ON - Canada

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So if you go flybarless, than you need to add a gyro for your forward/aft movement as well as your left and right? So you'll be running 3 seperate gyros instead of 1? Or is there actually a gyro specifically for flybarless setup that covers 2 axis'?
Yeah, you pretty well have the idea. If you go FBL you're essentially running 3 gyros. One for the tail, one for elevator, and one for aileron movement.

Different flavors of FBL stabilization units have different configurations. The 2 axis systems have 2 gyros inside them. One for aileron, one for elevator. 3 axis means it'll control the tail as well since it has 3 gyros inside.

Also, you don't necessarily HAVE to have a stabilization system to go flybarless. Many scale fliers have gone without. It's a bit of a trick to set up and the flight characteristics aren't good for any sort of acrobatic flying. The heli will be very pitchy without a stab system.
How do you decide if you want more or less weight in your flybar paddles, and wether you want them shorter or longer?
Since this hasn't been answered yet: Heavier paddles will make your heli more stable, but it won't roll/flip as quick. Though that can be counteracted with paddles that have more surface area. In theory slightly heavier paddles that are bigger will be better than small light ones since you'll get stability AND maneuverability. Really it's just trial and error for what you like.

Having a longer flybar will increase stability and maneuverability. Longer means the paddles are travelling faster and therefore have more authority. It also means more gyroscopic effect since they're going faster and the weight is further from center, so more stability. But the longer they are the more flex they'll be likely to have, and if you go too long the flybar could end up hitting things like your tail boom.

If it can't hover, it ain't worth flying.

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