I've been really interested in NASA's Mars helicopter and have been reading bits of articles on that recently. But I have a few questions I hope people can help me understand — in this article, it says that the helicopter blades had to be more rigid than those on Earth, but it doesn't really provide an explanation why.
Also, I remember reading here that the weight of the helicopter has to be really light on Mars...
The reduced gravity on Mars (about 38 percent of Earth's gravity) will help JPL pack a few more components onto the Mars Helicopter. But even so, the entire vehicle must weigh less than 1.8 kilograms (4 lbs).
Why is this so? How does the reduced gravity allow them to pack more weight but why does it still need to weigh so little?