-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On
Behalf Of Eric Chevalier
Sent: Tuesday, October 13, 2009 3:47 PM
To: [email protected]
Subject: Calulators or Computers? (Was: Outsourcing your Computer Center
to IBM ?)

On 13 Oct 2009 07:30:14 -0700, [email protected] (Ed Finnell) wrote:

>Anyway in this day and age TI or HP  calculators can do most of
>the preflight calculations...

It's not quite that simple. Sure, your TI or HP probably could perform
the calculations, but they don't integrate very well with the rest of
the system. Once you've figured out your basic payload and center of
gravity, now you need to order fuel. How much fuel? You don't want too
much, since excess fuel travels at air freight rates.  Obviously the
outputs from weight & balance become input to your fuel calculations.
But fuel requirements are also also a function of weather along the
route. So you'd also like to tap into the weather forecasting system
as inputs to the fuel system.

<SNIP>

Enter the spreadsheet on a laptop. Seems us GA pilots do this. And then
the AOPA online flight planner w/ weather. Now, take it's idea of how
long you will be in the air given the weather, add the required reserve
and put that into the weight and balance. Hmmmm, over weight. Tell the
family that they have to ship their knapsacks and lunch can't come with
us.

Clear prop and start engines....

Regards, 
Steve Thompson

-- Opinions expressed by poster probably do not reflect those of the
rest of aviation or poster's employer --

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