K4 Quad

If you're like me and own a Kossel Mini and want to build a T4 quadcopter, you're out of luck. The main body parts won't fit in your build area (17cm diam x 24cm tall). This is a rebuild of the main body to address that. It's also a one-piece body, which gives it incredible strength.

Here's the maiden flight video. Keep in mind, this is with default PIDs and no tuning of the control rates. It's VERY touchy, and has a lot of power. (hovering with 10-20% throttle only!)

I've also added the bottom part of the Naze32 case thing, since that's my flight board, but I can easily add files with different flight controller cases on the top.

The arms I remixed from the T4-DT750 remix, just tweaked them for better printing vertically.

UPDATE: THIS IS CRUCIAL, I forgot to mention that the arms are angled upwards at 10 degrees, basically emulating what Flite Test did with their angle brackets for multirotors. They mention the new flight characteristics in the Naze setup video. Find the video with all the information here

INFO:

Printer issues resolved. However, after printing it appeared that the cavities to bring the cables from inside the arms to where the ESCs are have too sharp angles. I'll need to redesign those completely for prototype V2.

Don't worry, it'll be posted here as a new file. In the meantime, my youtube video is showing V1 with the ESCs ziptied to the underside of the arms.

Also, I need to design a landing gear. It's coming. Patience.

Instructions

Printed at 0.2mm with 19% infill using Cura, no supports, 1mm shell thickness and was stiff like it was carved out of aluminum.

Rotate the file along the X axis -90 degrees so that it prints with the flat part on the bottom - tends to work better ;)

The cavities for battery and receiver should fit most components, but in case yours are bigger, I can try and adjust the size if you give me dimensions. I sized mine around the Multiplex M-Link DR-7 receiver and an nVision 2200mAh 3S. The battery compartment is too narrow and will be enlarged in the next version.

I fly using HobbyKing DT-750 motors, 18A ESCs (TowerPro Mag8, discontinued, they were just lying around), and an Acro Naze 32.

My Receiver is a Multiplex M-Link DR7, with twin antennas and telemetry built in.

Category: R/C Vehicles