This sub-collection contains raw data from the force-balance measurements.  After unzipping the compressed files, you will have two folders; one for each case (acceleration over one or six chords).  Within each folder are two sub-folders: 'Air' and 'Water', containing results from the emptied and full tow-tank runs.  There are five runs for each case.

Each file has five columns of data, but only the first four are relevant.  These are: time (s), normal force (V), tangential force (V), trigger channel (V).  The latter has nominal levels 0V before and after a run, and 5V during.  Calibration factors are:

Normal force
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0.5743 Newtons per Volt (N/V); air
1.2518 N/V; water

Tangential force
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0.6060 N/V; air and water