PPRuNe Forums - View Single Post - CG formula anyone ?
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Old 4th Jun 2008, 21:19
  #11 (permalink)  
john_tullamarine
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We look forward to seeing the picture ....

That is the datum given to us in our manual

Invariably, manuals give the OEM FS datum ... if the OEM suggests a trim datum (as most of the larger crowds do) generally it is hidden away in a Weight and Balance Manual somewhere. Nevertheless, the appearance (shape) of the envelope on the trimsheet gives the secret away in a glance ...

indices for the deadload instead of the scales to trim the deadloads

Presumably, this means that you don't have a "normal" trimsheet presentation .. and that the IU sums are done by tabulation and the answers transferred to the envelope ? .. a bit like a GAMA loading system calculation ?

definitely no waste of time or dogs breakfast

.. some elaboration .. my comment related only to extracting the base data from the trimsheet by reverse engineering the picture .. if the datum is the FS datum, then the sheet will be very coarse in its accuracy and the said extraction of underlying numbers becomes a tad more problematic .. if a sensible trim datum is used, the numbers usually fall out with a few minutes "back of a fag packet" calculations.

a script which actually greatly simplfies (so far) with 100% accuracy

Many of us who practise in the weight control arena avoid PC simulations like the plague due to the need for a LOT of error checking routines, etc. .. do be careful with your work ...

MAC to determine the T/O stab trim settings

Very conventional practice.

When you post the picture, we can help with the reverse engineering .. my interest is to help you get the thing correct .. far too many folk play with trim sheets and end up with all sorts of strange results ...
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