Their goal is to make the most accurate scale replica of the original full size plane. Usually, this requires hundreds of hours of building time and master craftsman skills. Many people love scale planes, but for most, sport scale is the better place to start. Many first-time plane buyers try to start with an advanced plane. Every plane has a speed where the wing simply stops flying.
Trainers have very slow stall speeds.
The low stall speed is due to the flat bottom airfoil shape. When a trainer does stall, it recovers quickly and with little control input from the pilot. A trainer takes very little altitude to recover. Trainers are stable and tend to right themselves. This stability makes the trainer easier to fly and smooths out mistakes.