I’m a web designer in Hong Kong who love DIY multi-copters with pixhawk controller and APMCopter firmware. I bought my first multi-copter 3DR Y6 on 2014, and lost it after a month! It was a lesson I learned multi-copter is not a plug-&-play toy, I have a lot of things to learn in this field. After that I started to build my multi-copter from frame, including ZMR-250, QAV500, Navio+ and Skyhero Spy 600. It is a blog to record my study of multi-copters.