Two Things That May Not Seem Related at First Recent news that Penrith, Australia was the hottest place on earth was underlined by videos of melting highways. Penrith, a suburb of Sydney, reached 47.3° C (117° F), enough to turn asphalt into a sticky mess and force drivers onto less gummy shoulders. Although over 2,400 miles away, Perth, home to Joshua Portlock’s Electro.Aero flying service, is at roughly the same latitude, and experienced near-record heat this month. Possibly, that accounts for the all-caps caution for prospective flyers: “WE RECOMMEND EARLY MORNING FLIGHTS IN SUMMER FOR THE SMOOTHEST CONDITIONS.” Joshua’s company took delivery of a Pipistrel Alpha Electro, and flew it on January 2, a first in Australian aviation. He and his team are offering two-hour instructional flights in the new aircraft for $220 AUD (about $172 USD). This opportunity to take lessons in an electric airplane will include the benefits of quiet, smooth flight. But heat brings on turbulence, and …