Here's a problem to test your mathematical and engineering skills. How big would a Phantom have to be, to fly on Mars? (Imagine a ground station flight returning to an auto-recharge station. The Mars atmosphere is about 7.5 millibars, compared to Earth being just over 1,000 millibars. Gravity on Mars is 38% that of Earth. Average temp -63C Doing a few calculations, I decided that an up-scaled Phantom would have to have a diameter of about 200cm or 80in, yet still weigh about 2kg on Earth, and without dirk's "passenger." Bonus question: Would DJI replace a fly-away on Mars?