Can someone check my math/physics? The atmosphere on Mars is about 1.7% as dense as on Earth, meaning that a propeller on Earth will generate 58.8x more thrust than on Mars. An aircraft on Earth will weigh 2.6x of its Mars weight. Drones probably need a thrust to weight ratio of at least 1.5 to be reasonably maneuverable. A drone that has a 1.5 thrust to weight ratio on Mars would have a thrust to weight ratio of 1.5 * 58.8 / 2.6 = 33.9. That is certainly higher than hobbyist Earth drones that I’m aware of, but not terribly hard to imagine. The craziest racing quadcopters I’ve seen have power to weight ratios of around 10.