© 2019 Published under licence by IOP Publishing Ltd. Machine applications with superconductors attract much interest in the industry. It is crucial to maintaining the operating temperature range between 28 K and 40 K for high-Temperature superconductor (HTS) field poles. A thermosyphon (TS) is a suitable choice for HTS applications' cooling system. The cryo-mechanical system composition is simple, lightweight and based on natural convection therefore not using any mechanical pump. Considering the rotating application, an adiabatic tube is necessary to carry the cryogen from the vertical condenser portion toward the horizontal evaporator part. However, this tube shape prevents the natural convection when in an inclined configuration which can occur for applications such as ship propulsion and electrical aircraft motors or generators. In this work, we focused on and investigated the heat transfer capacity of TS for inclinations. The results show that the TS cooling system employing the coaxial tubes architecture maintained the natural convection even under inclined conditions.