This a build guide for working single-rotor helicopters. I've spent quite a few months on and off, figuring out exactly what does and doesn't work for helicopters within Kerbal Space Program. This is the culmination of that effort. Please feel free to leave comments and feedback. Also, I'll post a link to the helicopter seen in this guide for anyone to reverse engineer.  Basic Layout  A conventional helicopter generates lift with a single main horizontal rotor, which produces a torq