  We systematically study the effects of collisions on the overall dynamical
evolution of dense star clusters using Monte Carlo simulations over many
relaxation times. We derive many observable properties of these clusters,
including their core radii and the radial distribution of collision products.
We also study different aspects of collisions in a cluster taking into account
the shorter lifetimes of more massive stars, which has not been studied in
detail before. Depending on the lifetimes of the significantly more massive
collision products, observable properties of the cluster can be modified
qualitatively; for example, even without binaries, core collapse can sometimes
be avoided simply because of stellar collisions.
