Apprentice STOL S 700mm RTF with SAFECall for shipping costs The HobbyZone Apprentice STOL S 700mm is the most capable, durable and easiest to fly ultra micro trainer yet! Scaled down from the popular Apprentice 1. 5m and 1. 2m models, its perfect for first time pilots to fly in more places and smaller spaces. Introduction For nearly two decades, multiple versions of the Apprentice have been the go to traditional trainer of choice for many first time RC pilots. The HobbyZone Apprentice