On Feb 4, 4:14 pm, RW Salnick <saln...@[EMAIL PROTECTED]
> wrote:
> coustanis brought forth on stone tablets:
>
>
>
> > On Feb 4, 3:28 pm, Kevin <dontemai...@[EMAIL PROTECTED]
> wrote:
>
> >>coustanis wrote:
>
> >>>On Feb 4, 2:56 pm, RW Salnick <saln...@[EMAIL PROTECTED]
> wrote:
>
> >>>>coustanis brought forth on stone tablets:
>
> >>>>>I have an Heli-Max AXE CP all electric helicopter.
> >>>>>Recently the tail rotor has become twitchy. It changes it's RPM
often
> >>>>>and instantly.
> >>>>>Twitchy is the best way I can describe it.
> >>>>>This makes it pretty hard to control the heli.
> >>>>>Thee heli has had a few tail strikes on the ground ( enough to
break
> >>>>>the rotor and gear teeth)
> >>>>>and a few low altitude (3 or 4 foot) crashes but nothing I would
have
> >>>>>considered very bad.
> >>>>>Any idea what might cause this. I hate to just start replacing
things
> >>>>>that aren't bad.
> >>>>>Low transmitter batteries?
> >>>>>Bad ESC.
> >>>>>Bad tail rotor motor?
>
> >>>>bad gyro?
>
> >>>I'm not sure it has one. I seem to remember reading that it did but
I
> >>>sure don't see it.
>
> >>its all in the receiver brick 4 in 1, receiver gyro and speed
controllers
>
> > I looked it up. It does indeed have one. One board is the receiver
> > and the other is the E board with the gyro / mixer etc.
> > That is one tiny gyro. Hard to think it would have much effect.
> > Anyway, there are some tuning pots on that board for tweaking gyro
> > gain and tail rotor trim.
> > Wonder if it got banged around too much. Is that common?
> > Would a twitchy tail rotor be a symptom of a bad gyro?
>
> yes.
>
> I have also seen the tail rotor "develop a mind of its own' at the very
> end of the battery charge. Apparently, when the battery voltage gets
> low enough, gyro operation becomes erratic for some reason.
>
> bob
This happens on a fresh charge, unless my battery packs are bad.
They're pretty new and don't have that many charges on them.
They get hot after running and I put them in the refridgerator or
freezer for a quick cool-down prior to recharging.
I recharge for two hours.
I'll get a fresh charge and pay close attention to see if it's twitchy
at the start.
|
