Amazingly, NASA is planning on sending a special helicopter to Mars, as part of their Mars 2020 rover mission.
The helicopter’s twin blades will whirl at about 10 times the rate of a helicopter’s blades on Earth — at 3,000 rpm — to stay aloft in Mars’ thin atmosphere.
“The altitude record for a helicopter flying here on Earth is about 40,000 feet [12,000 meters],” MiMi Aung, Mars Helicopter project manager at JPL, said in the statement. “The atmosphere of Mars is only one percent that of Earth, so when our helicopter is on the Martian surface, it’s already at the Earth equivalent of 100,000 feet [30,000 m] up.
“To make it fly at that low atmospheric density, we had to scrutinize everything, make it as light as possible while being as strong and as powerful as it can possibly be,” she added.
Read Article: https://www.space.com/40570-nasa-sending-helicopter-to-mars.html
John Hamilton from Murrieta