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Old 13th Feb 2016, 05:25
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+TSRA
 
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kazbak91,

Your location says NZ...It was years and years ago, but when I worked at the Aero Club in Rotorua we used an Excel spreadsheet for W&B calculations on our C172's and PA28's. CAA seemed to think it OK and the regs in NZ paralleled the FAA regs at the time (I'm sure they still do).

IIRC, we did demonstrate to CAA that a simulated Excel calculation came to within a reasonable result of the same calculation done via the POH charts. That was done very informally during one of their routine visits. We spent more time talking about the smell in Rotorua than we did the spreadsheet, which should indicate just how much they cared.

It's too bad I don't have the spreadsheet anymore, or I'd send it to you. I do remember that we had to program the spreadsheet such that Excel did not round - I think it was one or two decimal points. Otherwise it would give us an out-of-balance result where the POH indicated it was (just) inside limits.
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