Bright orange cylinder with four bright flames in middle. Unmanned. Very quiet. Traveling east to west.Bright orange cylinder heading east to west. Cylinder shape such as a large lampshade with four bright flames in center. No gondola for passengers. Appeared to be unmanned. About the same altitude that a helipcopter would be traveling. As it passed by, object made a "whooshing" sound. Moved at a moderate pace.