Just a quick clarification/update as I have had time to test this system
some more and ask a few more questions from the manufacturer:

First of all, the $629 price for the laptop-based WxWorx on Wings system by
Baron Services does not include an additional $30 for the antenna, which
brings the total cost to $659.

Second, the power requirement for the XMRadio receiver is 9VDC; however,
there is a voltage stepdown at the input to the receiver so it will accept
between 9V and 23V and therefore they anticipate it will be compatible with
most aircraft electrical systems.. .this is similar to the situation with
battery-powered GPS devices, which need to accept varying input voltages.
This is particularly important on 24V aircraft electrical systems which have
a stepped down "12V" cigarette lighter output but where this "12V" may vary
depending on the impedance of the connected device.

Next, the PDA version of their system will be sold by a separate company
called NavAiir. The PDA version apparently will be demonstrated at Oshkosh
but will not be for sale for 2-3 more weeks. It will cost $999 without the
PDA and is recommended to run on newer/faster PDAs only. It will use the
same weather data as the Weatherworx/Baron Services laptop-based system.

So my conclusions/plans a

1. Clearly there is quite a web of companies working with XMRadio to produce
weather datalink systems; it may be hard to sort out the various
relationships and there may well be new products and new companies formed
over time.

2. Both the laptop and the PDA versions of the various XMRadio weather
datalink products will clearly be memory/processor intensive and may not
work with laptops or PDAs more than 1-2 years old - read the specs carefully


3. I am convinced that the quality of the data is well worth it in a GA
cockpit, though I am concerned about the practicality of the various wires
and power connections in the cockpit. I think what I will do for myself is
to use the laptop-based version of the WxWorx system, buy a couple of A/C
inverters at Wamart with rechargable batteries, and try to put together my
own "weather datalink briefcase" which will contain my laptop computer, A/C
inverters, XMRadio receiver, and assorted wires; this should then work in
the airplane or the car (for learning purposes as I drive through
thunderstorms) or anywhere else... the ultimate "nerd bag" for a
weaher-addicted pilot. If anyone else does something like this, shared
details would be helpful.


--
Richard Kaplan, CFII

www.flyimc.com