Level: Intermediate/Advanced Craft used to illustrate this tutorial: BAK-52NS Version history: 1.2 - Updated with a note on 1.7.3 built-in rotor and propeller blades 1.1 - Updated with better rotors, thanks to a tip from @Hotel26 1.0 - Original version   About this tutorial This tutorial is a basic primer on stock helicopters made with parts from the Breaking Ground DLC. It does not discuss pre-Breaking Ground stock rotary motors, nor helicopters made with mod parts. I have lim