Tony,
The only backside to the Navaid is the use of their "turn-and
-bank" indicator used in conjunction with their servo. I did not want
to get rid of my turn coordinator to use their electronic version. I
want my "6 pack" to be normal. The Tru-Track is digital and is
completely separate in instrumentation from the flight instruments.
Plus, the Tru-Track has a build in "magnetic heading" indicator when not
using the tracking feature with your GPS unit. So, the decision was easy.
Separate with a back up mag heading indicator beats the Navaid.
Jim Nelson
<tonyrenshaw@optusnet.com.au> writes:
> <tonyrenshaw@optusnet.com.au>
>
> Gidday,
> This is a query for those that might know the difference between the
> Navaid
> Servo and the TruTrak, whether one or other is digital versus
> analogue
> controlled, what type of mechanisms they are, and whether there is a
> strong
> argument for one over the other. With Autopilots, the TrioAvionics
> unit
> appears to have the most capable head, and it uses the Navaid Servo.
> I
> asked about the servo and they cost $685 US, which is about $50 more
> than
> through Navaid, because they strip them down, adjust a few cogs, and
> also
> adjust the potentiometer, to dampen out some of the oscillation
> characteristics of these units, and then bench test with one of
> their
> control heads. So, when speaking to a TruTrak friend, he says his
> servo
> uses a stepper motor, which by the accurate way it stops and starts
> suggests a digital control, where the Navaid has potentiometers, so
> this
> implies an analogue signal, doesn't it. I am wondering if the Trio
> is
> particularly good with their head capabilities, but lacking with
> the
> technology put into their servos, or should I say, their choice to
> use the
> Navaid product. So, if anyone can shed any light on how these things
> work,
> and whether one is significantly better than the other, well I'd
> love to know.
>
> Reg
> Tony Renshaw
> Sydney Australia
>
> Classic 236 B.B. Taildragger (possibly convertible)
> Tail, Wings, Ailerons, Flaps Complete and Connected
> Lower Fuse in Jig, Tail Torque Tube installed
> Mass Balance assembly installed and deflections sorted
> Intended Engine: 912S CS prop (model undecided)
> Instrumentation: Undecided
>
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