  We have carried out an extensive study of a sample of 13 large, powerful
Fanaroff-Riley type II radio galaxies with the Very Large Array in multiple
configurations at 330 MHz, 1.4, 5 and 8 GHz. We present the total intensity,
polarization, spectral index, and rotation measure maps of the sources. On the
whole the 13 FRII sources have symmetric structures with arm-length ratios
close to unity, small misalignment angles and low values of radio core
prominence, suggesting that these radio galaxies lie close to the plane of the
sky. We have revisited some well known radio galaxy correlations using a large
combined dataset comprising our radio galaxies and others from the literature.
We confirm that the hotspot size correlates with the core-hotspot distance. The
hotspot spectral index is correlated with, and flatter than the lobe spectral
index, consistent with the assumptions of spectral aging models. Both the
hotspot and lobe spectral index are correlated with redshift. The
depolarization asymmetry in the lobes is not correlated with the radio core
prominence or misalignment angle, which are statistical indicators of
orientation. The `Liu-Pooley' correlation of lobe depolarization with the lobe
spectral index is significant in our radio galaxy sample. Further, the lobe
with the steeper spectral index and greater depolarization is shorter and
fatter. The arm-length ratio seems to be correlated with the misalignment angle
between the two sides of the radio source and strongly anti-correlated with the
axial ratio, consistent with environmental effects and/or a change in the
outflow direction. In this sample, asymmetries in the local environments and/or
motion of the outflow axis are likely to be more important than relativistic
beaming effects.
