The rev up rotation is a phenomenon of that rotor accelerated from rest up to a constant rotational
speed, which can be defined as a successful ‘start’. The starting time sequence, , depends on and
. At lower wind speed, go up more rapidly with respect to the increasing rate of . Conversely,
at higher wind speed, go up with less responsive to the increasing rate of . Figure 7 reveals the
relationship among starting time sequence and at several of .