To all:
Thanks for response to my inquiry, I now understand the flybar's
purpose.
Stearman
"Steve R" <srhodes13@[EMAIL PROTECTED]
> wrote in message
news:mqudnf8XEKsVaiPanZ2dnUVZ_ternZ2d@[EMAIL PROTECTED]
> "Peter Christy" <christy@[EMAIL PROTECTED]
> wrote in message
> news:EWWsj.347$yv1.150@[EMAIL PROTECTED]
> > stearman wrote:
> >
> >> I have recently purchased my first helio (Raptor 50 Titan) and am
getting
> >> ready to assemble. Also purchased Aerofly sim and the "Basics of RC
> >> Helicopters" book.
> >> I have read thru most of the book but cannot find any info on what
the
> >> flybars purpose is. Has anyone got a link to a narrative on the web
for
> >> Flybars ?
> >>
> >> Stearman
> >
> > The flybar acts as a "damper" on the rotorblades, and reduces the rate
of
> > response to something that human reactions can cope with.
> >
> > Without some kind of "rate reducer", the response rate of the rotor
disc
> > is
> > so fast that it would have re-acted to your control inputs and crashed
> > before you even realised what had happened!
> >
> > By mechanically linking the rotor disk to the flybar, the whole
assembly
> > can
> > only move at the rate of the slowest reacting component - in this case
the
> > flybar (be it Bell, Hiller or a combination of the two).
> >
> > It is often referred to as a gyroscopic stabiliser, but this isn't
> > strictly
> > correct. A system doesn't have to be stable to be flyable, provided it
> > only
> > diverges slowly enough for a human pilot to react.
> >
> > The gyro on the tail rotor performs a similar function.
> >
> > --
> > Pete
>
> What Pete says is essentially true and for most of us, that's how the
> helicopter is configured. The flybar is acting as a "stabilizer" and is
> actually reducing the control inputs that we're putting to the main
rotor
> system. However, putting large, "light" paddles on the flybar and
changing
> the Bell/Hiller mix ratios involved and you can have lightning quick
cyclic
> responses. Many hard core 3D pilots use this kind of setup. It's not
> faster than human capabilities to control, but does take a fair amount
of
> concentration to keep up with until you get used to it. "Finesse" is
the
> key work here! :-)
>
> Also, there are a number of flybarless heads available out there that
fly
> just fine although they're not generally as stable as a flybar equipped
> system but certainly not a total handful to fly either. My first
helicopter
> was a flybarless machine called a Horizon. I learned to hover on it
without
> any significant issues with cyclic authority and that was, as I found
out
> later, even with my cyclic throws set a couple of degrees higher than
> recommended for beginners because I didn't understand what the
directions
> were asking me to do on the setup parameters.
>
> FWIW!
> Fly Safe,
> Steve R.
>
>
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