On Thursday, 17 May 2018 21:26:06 UTC+2, Chris L Peterson wrote:
On Thu, 17 May 2018 10:37:52 -0700 (PDT), Quadibloc.


I just checked. 0.6% of Earth's, I'm afraid.

That's true for pressure, although the density is more relevant to the
performance of wings (moving or fixed). The atmospheric density at the
surface of Mars averages 1.6% that of Earth's. That's about the same
as the density at a height of 30 km on Earth. That's right in the area
that the highest winged aircraft have flown.

I seem to have moved a decimal point after deliberately checking before posting. Just the price of living on a world with 70 billion people and a diameter of 75000 miles. More of a Super Earth than a Pale Blue Dot. It's fortunate the Sun is only 9.3 million miles away or we couldn't possibly feed them all. I hear Google wants to raise the speed limit to 550mph for self driving cars and a Big Mac now weighs a whopping 25lbs not including the attached litter. ;-)