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Posted by Adrian_ | Apr 21, 2019 @ 11:20 AM | 720 Views
When thinking about the pros and cons of vertical arms this idea striked my mind: Combine vertical and horizontal arms to form a T-Beam. I started designing a frame for a 4" ultralight (<250g all-up-weight) with easily interchangable arms, minimal weight and maximal durabiliy in mind. Ok, fair enough, this is probably the goal for most frames out there, but I think this approach is pretty different and I'm quite happy with how it turned out! The T-Beams give the frame an incredible amout of stiffnes and good durability, especially considering the weight of only 33g. And most importantly the design is completely open-source, you can take a look here. Edit: I just realized you need to create an account to watch it :/ But it's worth it

This frame allows you to build a Quadcopter with 1407 Motors, 20x20mm Stack, Micro-Camera and a 4S 800-850mAh Battery under 250g AUW! It has an insane amount of power and feels really agile in the air. I used the Rotorgeeks motors and HQ 4x4.3x3 V1S. This is a perfect combination I think and those props are just awesome.

A few notes about the design.
-The T-Beams should be glued into the arm with epoxy
-The Top-Plate is held in place by rubber bands/big O-Rings using eiter the hooks on top or a little furter down. Initially I used long screws which went alls the way through the frame but then dropped this idea because it was just not practical. However, if you like to, you can just load version 0.10c in Onshape. I also attached...Continue Reading