  We examine the corecollapse times of isolated, two-mass-component star
clusters using Fokker-Planck models. With initial condition of Plummer models,
we find that the corecollapse times of clusters with M_1/M_2 >> 1 are well
correlated with (N_1/N_2)^{1/2}(m_1/m_2)^{2} t_{rh}, where M_1/M_2 and m_1/m_2
are the light to heavy component total and individual mass ratios,
respectively, N_1/N_2 is the number ratio, and t_{rh} is the initial half-mass
relaxation time scale. We also find two-component cluster parameters that best
match multi-component (thus more realistic) clusters with power-law mass
functions.
