A windier day. Anemometer alone, average 6 m/s, peaking at 7.3 m/s, anemometer within 42 cm tire, average 7.2 m/s, peaking at 8.8 m/s (always 20% faster, at several wind speeds).
Then the whole in the buoy was not better, peaking at 8.3 m/s.
That said tests were performed again because (compared to the anemometer in the same 42 cm tire but with not taut enough wires):
Previous measurements were underestimated due to lack of tension in the wires holding the anemometer. This is the reason why other tests were carried out with a higher tension of all the wires holding the anemometer which was able to position itself facing the wind in all circumstances. The measured increase of efficiency was significant, being approximately 25 percent. Measurements in a windy day gave the following values at three different wind speeds: an anemometer alone and another anemometer in the 42 cm tire (as previously) in the same time: respectively 6 m/s and 7.5 m/s; 7.4 m/s and 10 m/s (unusual increase); 10.2 and 12.6 m/s. In all tests, the proportion of increase does not appear to depend on wind speed.
Anemometer in the tire well positioned with taut wires
A more compact option was added in these experiments.
