PH145 Brushless FPV Quadcopter

The PH145 quadcopter was inspired by the [RS90](http://www.thingiverse.com/thing:1596739) and [DJ105](http://www.thingiverse.com/thing:1580385) brushless quadcopters. The RS90 looked like fun, but the DJ105 wasn't much bigger and produces a lot more thrust. The DJ105 uses 2.5 inch propellers, and I quickly learned that these are rare. 3 inch propellers are available everywhere, and there's a much bigger selection of motors if you build a little bigger than the DJ105.

* [My 3D Printed Quadcopter - The PH145 Drone](http://blog.patshead.com/2017/02/my-3d-printed-quadcopter-the-ph145-drone.html) at patshead.com

Like the RS90 and DJ105, my PH145 drone frame is printed using Taulman 910 nylon filament. It is sturdy stuff. I crash all the time.

Version 2.0 of the PH145 frame is the third model I have printed and flown. The prop guards on the prototype model were too thin, and I had an OpenSCAD error at each corner that created a weak point. For version 1.0, I increased the thi