A round tube evacuated of any gases (maybe constructed in space) surrounded by electromagnets. A ferrous material is constructed inside the tube. Say maybe a BB (as in BB gun) by use of electromagnets create a rail gun type of effect around the circle tube and then the velocity of the BB is steadily increased using the rail gun technique. Questions: With the absence of friction because of the vacuum (or as near to one as what construction in space will allow) and the BB being so manipulated as to keep it in the center of the tube. What speeds or velocities are possible using the rail gun type of model? When the top speed is increased if possible to attain any significant percentage of C (light) would manipulation of the BB up and down by way of the electromagnets, have any type of effect such as the experiment where you spin a bicycle tire and hold it by the axel while on ice, i.e. when you move the axis in proportion to the rotation you get movement of the whole system. Or in other words would you get a gyro type effect even though there is not a direct connection between the BB and the center of the circle? for instance if the BB is suddenly moved up would the entire model move up? and for how long?