Since the official advent of LSAs at Sun ’n Fun 2005, the type has taken off beyond the wildest dreams of its developers. It seems there’s some kind of LSA on virtually every airport ramp these days. In view of the type’s popularity, LSA designers have looked for ways to push right up against the allowable limits of certification. The type is limited to 600 kg (1,320 pounds) gross weight, can’t carry more than two folks and can’t exceed a cruise speed of 120 knots. Additionally, it must rest on fixed gear and fly behind a fixed-pitch or ground-adjustable prop.
The whole idea was safety. Keep the airplane simple, comparatively slow and lightweight, and there will be fewer accidents (those that do occur will inflict less injuries).