Martian Combustion-Powered Fixed-Wing UAVs: An Introductory Investigation and Analysis

The Martian topography needs to be investigated in greater detail for human habitations, and this can be accomplished faster using unmanned aerial vehicles (UAVs). In this regard, the RQ-11B Raven appears suitable for remote sensing and topography-mapping applications on Mars, due to its popularity in surveillance and reconnaissance applications on Earth. As a result, this study investigates the flight of this UAV in the Martian atmosphere with the assumptions that it employs an NACA S7012 airfoil and its electric propulsion technology is replaced with a four-stroke oxy-methane fueled Saito FG-11 internal combustion engine (ICE). This ICE is estimated to supply 367.8 W resulting in an engine speed of 6891 revolutions per minute. Based on this speed, the UAV must fly at least 72 m/s (Re = 18,100) at a 5 degrees angle of attack to support flight under calm conditions. To achieve this speed will be difficult; thus, a weather balloon or German V1-style launch system should be employed to launch the UAV successfully. Furthermore, the UAV must operate below 165 m/s (Re = 41,450) to prevent transonic conditions. Finally, the vehicle's fuel and oxidizer tanks can be refueled using an in situ methane and oxygen production system, enabling its sustainable use on Mars.

Automated summary

This study examines the feasibility of using unmanned aerial vehicles (UAVs) for Martian topography investigation. It suggests that the RQ-11B Raven UAV, equipped with a NACA S7012 airfoil and a four-stroke oxy-methane fueled Saito FG-11 internal combustion engine (ICE), could be suitable for remote sensing and topography-mapping applications on Mars. The study also highlights the challenges of achieving the required flight speed and avoiding transonic conditions.