Today, flight schools use typically side-by-side airplanes for training. When I learned to fly, I started on gliders. My initial training was in a tandem glider. Similar to this one, just not as modern: The instructor was in the back seat. Communication was not a...

most efficient and ecologically sustainable piston engine aircraft in the market.

Light aircraft engines have not seen many revolutionary new designs since the years of shortly after WWII. The Lycoming O-320, as an example, has been continuously in production since 1953. There have been many improvements over the years. Significant ones in...