NASA's Dragonfly Drone, Set to Fly on Titan (Moon of Saturn), is Taking Shape
NASA's Ingenuity was the first drone to fly on another planet (Mars), far exceeding the initial expectations of the space agency and successfully achieving 72 flights. NASA is developing other similar systems, but larger and more complex, with some units to be present on the nuclear propulsion spacecraft Space Reactor-1 Freedom. Another mission that involves a drone is NASA Dragonfly, which will be launched with a SpaceX Falcon Heavy rocket in 2028 towards Titan, Saturn's moon, where it will arrive in late 2034.
The NASA Dragonfly drone will be larger, more expensive, and more complex than Ingenuity. This new exploration system will indeed be equipped with multiple rotors and will be powered not by a solar panel but by an RTG (Radioisotope Thermoelectric Generator or MMRTG, Multi-Mission Radioisotope Thermoelectric Generator) powered by plutonium-238, providing enough energy even far from the Sun. It will also carry scientific instruments to gather useful data and information about Titan's atmosphere and surface.
The NASA Dragonfly Drone Takes Shape in Preparation for the 2028 Launch
JPL and NASA are continuing the construction of the drone and conducting a series of joint tests on various components. At the end of April, the delivery of the panels that make up the body of NASA Dragonfly was announced. These are made of aluminum with a honeycomb structure to be strong yet lightweight, considering a thickness of less than one millimeter.
The total mass of the drone's frame is 230 kg, enabling it to be launched into deep space without issues, while also being sturdy enough to withstand the launch conditions. In May, tests for vibration resistance and static load were conducted to verify that the structure can endure the dynamic forces of launch, atmospheric entry, and landing on Titan.
Earlier, in February, the parachute system (called Entry, Descent, and Landing or EDL) that will slow down the descent towards the surface of the drone's entry and landing system was tested. As in other missions, a drogue chute will be used, followed by large main parachutes that will take advantage of Titan's dense atmosphere. In recent weeks, engineers have focused on the thermal shield made of carbon fiber and lightweight resin to ensure its resilience, even if damaged.
The Dragonfly Mass Spectrometer (DraMS), one of the drone's instruments, will utilize lasers, a gas chromatograph, and a mass spectrometer to study the surface composition of the satellite. Tests conducted in April confirmed the system's ability to identify known molecules, allowing for its integration.
Testing is also underway for the antennas that will enable the drone to communicate with Earth through the Deep Space Network. In particular, tests were performed with the high-gain antenna (HGA) measuring 87 cm in diameter, covered in Kapton to withstand Titan's frigid nights. Its structure, which allows for a narrow and focused radio beam, has already been employed in NASA's DART and NASA's ESCAPADE missions. Along with the high-gain antenna, a medium-gain antenna (HGA backup) and a low-gain antenna (used for transmitting basic information) will be included.
NASA Dragonfly's main mission will last for 3.3 years and will land in the Selk crater area. The drone is expected to take off from the ground every 1 or 2 days on Titan (referred to as Tsol), equal to 16 Earth days. During its movements, it should cover approximately 115 km. Although the renders shown during the presentation were not immediately clear, NASA Dragonfly will have a mass of 875 kg and dimensions of 3.85 x 1.75 meters (significantly larger than Ingenuity). It will have 8 sets of coaxial propellers measuring 1.35 meters to achieve flight.