An as-yet untested design for a three prop multirotor aircraft. I intend to build and test it, but I am putting the design here for science. All STLs are in random orientations. If you wish to print it before I finalize, use your best judgement on how to rotate the items appropriately. When final, I will ensure they are in what I consider the best orientation for printing.
Designed around 2212 brushless motors, props from 8-12", depending on KV rating, a Futaba S3003 size servo for rear vector steering, and whatever electronics you wish to use. I may go the entirely home brew route and use something simplistic such as MultiWii on a Nano dev board, with an external MPU6050/9250 and basic Ublox 6M GPS.
I have updated the electronics box with a 30x30mm M3 mounting location for common F3 FC boards. There should be enough room for a radio, as well.
Above the lower battery deck there is a mounting point for a power distribution board, such as the PDB-XT60, with through-holes for running power wires on to the ESCs and BEC current up to the electronics box.
Given what I know the electronics and battery weigh, and what Cura tells me all these parts should weigh at an average of 30% infill (possibly overkill), I suspect I can get this in the air with just under a kilogram of total flight weight.
Will require all M3 hardware to assemble. You can use M3x6 with hot insert knurled nuts for the arms, but it is designed to be secured with long (25+mm) M3 bolt and nuts for maximum strength. 15 M3x25 and 4 M3x30 bolts would be required to build that way, but I'm not sure if I have such long hardware on hand. M3x6-10 can be used to secure the landing gear and electronics.