High Speed Quad 8 inch props

Multirotor with tennis ball drop, designed for ACV competition. Current maximum speed is 144 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 arms that must be removed with a screw driver. Be careful not to spit the arms during removal of the support material.