High Speed Quad 10 inch props

Multirotor with tennis ball drop, designed for ACV competition. Current maximum speed is 110 km/h.
See my post on DIYDrones for more info and parts list.
http://diydrones.com/profiles/blogs/printed-high-speed-avc-copter-and-crash
I suggest building with ABS using a 20% fill and 4 or more outer layers. To build these objects I used support material and raised the whole part off the bed so it was completely supported by the support material. This results in support material inside the arm