  We analyzed series of spectra obtained for twelve stable RRc stars observed
with the echelle spectro- graph of the du Pont telescope at Las Campanas
Observatory and we analyzed the spectra of RRc Blazhko stars discussed by Govea
et al. (2014). We derived model atmosphere parameters, [Fe/H] metallicities,
and [X/Fe] abundance ratios for 12 species of 9 elements. We co-added all
spectra ob- tained during the pulsation cycles to increase S/N and demonstrate
that these spectra give results superior to those obtained by co-addition in
small phase intervals. The RRc abundances are in good agreement with those
derived for the RRab stars of Chadid et al. (2017). We used radial velocity
measurements of metal lines and H{\alpha} to construct variations of velocity
with phase, and center-of-mass velocities. We used these to construct
radial-velocity templates for use in low-medium resolution radial velocity
surveys of RRc stars. Additionally, we calculated primary accelerations, radius
variations, metal and H{\alpha} velocity amplitudes, which we display as
regressions against primary acceleration. We employ these results to compare
the atmosphere structures of metal-poor RRc stars with their RRab counterparts.
Finally, we use the radial velocity data for our Blazhko stars and the Blazhko
periods of Szczygie l & Fabrycky (2007) to falsify the Blazhko oblique rotator
hypothesis.
