  We discuss recent observational data on the transverse and radial velocities,
as well as on the masses of the main components of the Orion Trapezium. Based
on the most reliable values of these quantities we study the dynamical
evolution of ensembles of multiple systems mimicking the Orion Trapezium. To
this end we conduct numerical $N-$body integrations using the observed masses,
planar positions and velocities, radial velocities, and random line-of-sight
($z$) positions for all components. We include perturbations in these
quantities compatible with the observational errors. We find the dynamical
lifetimes of such systems to be quite short, of the order of 10 to 50 thousand
years. The end result of the simulations is usually a tight binary, or
sometimes a hierarchical triple. The properties of the evolved systems are
studied at different values of the crossing times. The frequency distributions
of the major semiaxes and eccentricities of the resulting binaries are
discussed and compared with observations.
