will provide the capability to explore diverse locations to characterize the habitability of Titan's environment, investigate how far prebiotic chemistry has progressed, and search for biosignatures indicative of life based on water as solvent and even hypothetical types of biochemistry. The atmosphere contains plentiful nitrogen and methane, and strong evidence indicates that liquid methane exists on the surface. Evidence also indicates the presence of liquid water and ammonia under the surface, which may be delivered to the surface by cryovolcanic activity. Design and construction Dragonfly will be a rotorcraft lander, much like a large quadcopter with double rotors, which is known as an octocopter. Redundant rotor configuration will enable the mission to tolerate the loss of at least one rotor or motor. Each of the craft's eight rotors will be about in diameter. The aircraft will travel at about and climb to an altitude of up to . Flight on Titan is aerodynamically benign as Titan has low gravity and little wind, and its dense atmosphere allows for efficient rotor propulsion. The radioisotope thermoelectric generator (RTG) power source has been proven in multiple spacecraft, and the extensive use of quad drones on Earth provides a well-understood flight system that is being complemented with algorithms to enable independent actions in real-time. The craft will be designed to operate in a space radiation environment and in temperatures averaging . Titan's dense atmosphere and low gravity mean that the flight power for a given mass is a factor of about 40 times lower than on Earth. The atmosphere has 1.45 times the pressure and about four times the density of Earth's, and local gravity (13.8% of Earth's) will make it easier to fly, although cold temperatures, lower light levels and higher atmospheric drag on the airframe will be challenges. Dragonfly will be able to fly several kilometers, powered by a lithium-ion battery, which will be recharged by a Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) during the night. MMRTGs convert the heat from the natural decay of a radioisotope into electricity. The rotorcraft will be able to travel ten miles on every battery charge and stay aloft for a half hour each time. The vehicle will use sensors to scout new science targets, and then return to the original site until new landing destinations are approved by mission controllers. The Dragonfly rotorcraft will be approximately , and packaged inside a diameter heatshield. Regolith samples will