The Speedstar CH 40K was designed with all the same versatility as a 50K, but a slightly smaller load rating.  The real advantage comes with the multiple-speed tophead, allowing for increased speed and torque coupled with the increased tophead travel speed, making this unit extremely dynamic and highly efficient.  The rig retains a relatively compact size, allowing for excellent location accessibility, quick operational setup, and rig movement.  Configured with onboard injection pumps & compressors, this decreases the site footprint and site-to-site move time by eliminating the need for auxiliary and external air/mud circulation equipment.