-90C. Yikes! Flew H-60s in -30C temps on two continents. Lots of warm-up time. Having a Herman Nelson blowing warm air into the interior for 30 minutes prior to was money.
Regards the Mars helo, I’m sure Igor is smiling.
The helo has a six lithium-ion batteries (equivalent to a couple of cell phones) on board to keep it warm during the night! It won’t fly the next day until the batteries have charged up enough to power the flight and get through the next night. That restricts flying until late morning. As NASA and JPL get some experience, they will try flying earlier in the morning.
There will be one 90-second flight per Martian day with an average power consumption of ~350 Watts during the flight.