Internal orbital engine

An orbital engine with a first outer generally tubular body with two outer body ends and an inside, said first outer body having a first axis, a second generally tubular inner body with an outside and a second axis, the second inner body being contained and movable within the first outer body, said first and second axes being parallel, but not colinear, the second inner body having a crank with two ends, one of said two crank ends being connected to the second inner body at the second axis, and the other of said two crank ends being connected to a power drive at the first axis of the first outer body, there being a plurality of vanes extending in slots generally radially relative to both inner and outer bodies, from the inside of the first outer body to the outside of the second inner body, said vanes and said two outer body ends defining a plurality of chambers in a space between the outside of the inner body and the inside of the outer body, the vanes being slidably movable within the slots and reciprocally movable relative to the inside of the outer body, so that rotation of the crank or the power drive results in the orbiting, but not rotation, of the second inner body within the first outer body.