I am creating the second version of the quad because I wasn’t happy with the performance of the first one. It was too heavy for the generated thrust. The 4 NTM 3536 motors were producing only 150% of the aircraft’s weight. That means the quad was hovering at 66% throttle which is not ok for my requirements, since I want to transport a 400g camera onboard.

My plan is to change the battery from a 3S (11.1V) to a 4S (14.8V) and change the propellers to generate more thrust. I also want to minimize the weight, so I am completely changing the frame structure. I am going again for a sandwich structure. I am using the 14mm booms for the main structure, which will be reinforced by the bottom and upper plates made of PCB. By doing this, I will also benefit from the copper paths and thus, have a distribution board for my ESCs.

The dxf files for the frame are my own design and can be downloaded for free from here under GNU license.


A new RC project is coming! This time, the achieved CAD skills from TU Delft helped me to simulate the entire model and therefore make the optimal design:


The dxf files for the frame are my own design and can be downloaded for free from here under GNU license. I chose to make the frame out of 2mm carbon fiber because I found cheap sheets on http://www.hobbyking.com. Unfortunately, I couldn’t find a laser that cuts carbon fiber sheets, so I cut them with the Dremel.


  • Motors: 4x3536 NTM (910kV, 350W)
  • Props: 4×12″
  • ESC: 4x30A
  • Accu: 5000mA
  • Frame and booms: Carbon fiber
  • Controller: HKPilot 2.7

Each motor produces 1.2kg of thrust and the final weight of the aircraft is 3.2kg. It stays in the air very stable because of the 320mm long booms.

The final product looks like this: