  This paper investigates the projectivization of real vector bundles over
small covers. We first give a necessary and sufficient condition for such a
projectivization to be a small cover. Then associated with moment-angle
manifolds, we further study the structure of such a projectivization as a small
cover. As an application, we characterize the real projective bundles over
2-dimensional small covers by interpreting the fibre sum operation to some
combinatorial operation. Finally, we study when the projectivization of Whitney
sum of the tautological line bundle and the tangent bundle over real projective
space is diffeomorphic to the product of two real projective spaces.
