The bearing problem with vortex anemometers seems finally to get solved although some long running test in aggressive environments should be performed. This stress-test that has unveiled problems with earlier bearing designs.
The Vortex anemometer was mounted on the car roof for a long to north Sweden in total approximately 1000 km. Rain & snow temperatures around 0-10 C. Speed around 80-120 km/hourCar mounting
This Vortex is a rebuilt with low-power Hall element and connected to low-power logger. About 400 km were logged. The reported speed is lower then the actual speed. This probably due to the mounting of the anemometer.