Four. That was my score—or rather, the number of ACEs, otherwise known as adverse childhood experiences—I went through in my upbringing, according to the test in front of me. As I sat at a scheduled ...

Let’s have a look at the Advanced Controls Evaluator (ACE), based on the Aero Vodochody L-39C, presented at the 11th annual Flight Test Seminar of the International Test Pilots School (ITPS). The ...