Quadcopters

Building a DIY sub-500 gram quadcopter

In a previous post I've discussed the advantages of a lightweight aircraft: longer flight times, quieter operation, less stress to the components, more responsive control. In addition, having an aircraft below 500 grams (less than around 1.10 pounds) has the advantage that in many countries it does not require registration to fly, except for where specific restrictions apply, of course.…

Controlling WifiBroadcast Video with an RC Switch

Wifibroadcast (WBC) is a project that aims to bring the advantages of analog video transmission to the digital world. In his blog, WBC creator befinitiv has described the project as follows: Wifibroadcast is a project aimed at the live transmission of HD video (and other) data using wifi radios. One prominent use case is to transmit camera images for a first…

Another take on the CF frame

In the last post I went through the process of designing and realizing my first Carbon Fiber-based H-quad. While the molding and lamination process itself was successful, the design was based on an open section, a fact that made it twist excessively even though it was quite resistant to bending. I thus went on to redesign the central "unibody" frame…

On the Road to a Full-CF Aircraft

The main driving force behind my current UAV experiments is lowering aircraft weight and noise. In principle though, this should not come at the expense of other factors, such as flying time, rigidity, responsiveness and crash-worthiness. So with these in mind, and after the eventual success of my last build, I've been planning for some time to build a quadcopter…

New ESCs, 3D Printed Raspberry Pi Mounts

The last incendiary event made me soon figure out that new ESCs would be required if I'd want to get the craft off the ground anytime soon. I went and grabbed a bunch of T-Motor Air 20A ESCs, whic turned out to be quite the reliable little beasts, and quiet too. Granted, the whole cable management business was a bit more…

Flash & Burn, ESC edition

Many ESCs produce a high-pitched whining noise while running the motors. This is a result of the current switching that happens at the ESC. In many models, the frequency of switching is in the high audible range, and this translates to whining noise. If you've been following this blog for some time, you;d know that one of my main goals in my…

CF-450: Designing the 3D Printed Brace

After the last experiment, I went on to design a frame that would have reduced weight but still be stiff enough. This time I planned to use the center plates of the F450 frame, because of their stiff connections to the arms. I started by looking at the weight breakdown of the F450 frame: Arms: 50 grams or 1.76 oz…

S01E01: The W-500

It always starts with an F-450, or a clone of it. Always. Unless you're a pro willing to cough up a five digit figure just to get in the air, or you're going for the RTF stuff, you must have come across an F-450 in your multicopter ventures. I think that DJI should be proud for this achievement alone though.…