Ah, but a good test pilot gets lots of data from one test. What I saw in there was:-
- Low apparent stall compared to book figure.
- Large disparity between GPS ground and ASI indicated speeds.
- Apparent lack of difference between GPS groundspeed into and downwind.
- Difference between TAS and GPS groundspeed due to RoD
- Use of non-aeronautical units.
And was trying to cover all of those without getting too complicated and including power and CG.
G