Sat Apr 02, 2016 12:50 pm
When I was stationed in Northern California, we used to enjoy flying down the Interstate, keeping our shadow directly over the road, and then try to match speed with a car, keeping the shadow directly over it... Fun to watch the cars react when they find themselves in shade on a perfectly cloudless day, then suddenly put 2+2 together and slam on the brakes because of the signs along the road "Caution: Vehicle speed monitored by aircraft."
Later on, I flew along I-10 from California to Texas, and we tried to do the same thing. Only problem was our cruise speed was about 105 knots, and some of the cars (and some of the semis) were going faster than we were (headwinds).