I flew a motorglider with an MT-7-A electric CS prop which takes 90 seconds to fully feather. Contrast that to a hydraulic governed prop, which takes just a few seconds to go from one extreme to the other. Quite the shocking difference!
Compared to other electric constant speed props, is 90 seconds to feather slow, fast, or par for the course? What models would be considered fast and what models would be considered slow?