Charles Blouin's Blog (11)

10 km high flight with a 1kg quadcopter!

I was quite surprised to see a quadcopter flying that high! It was done by Денис Корякин as shown on his youtube channel.


Receiver: TrueRC 5.8GHz X²-AIR Antenna RHCP

FPV glasses: Furious True-D V3.5 Diversity Receiver System

Video transmission: Antenna FOXEER Thor 60mm…


Added by Charles Blouin on March 19, 2018 at 7:30pm — 14 Comments

First affordable USB thrust stand available now!

We are now shipping the RCbenchmark Series 1520. It measures overall efficiency, current, thrust, voltage, and motor speed. The device communicates with our…


Added by Charles Blouin on February 22, 2016 at 4:50pm — 47 Comments

Estimate torque and efficiency from Kv

How do you estimate motor torque and efficiency from basic measurements? It is useful to know this information to improve flight time and performance. The video explains the fundamental relationship between Kt and Kv. It turns out you can get a lot of information from the motor Kv.

This video is part of a series. There are more tutorials on the…


Added by Charles Blouin on February 15, 2016 at 10:30am — 5 Comments

Improving motor and propeller performance: theory and application (part1)

As promised, here is part 1 of our series on motor and propeller theory. Part 1 covers the coil magnet model, Kirchhoff's law for a motor, Back EMF, Kv, Kt, and motor efficiency.

By the end of the first video, you should really understand why is a motor is inefficient and the relation between electrical power, heat and mechanical power. The motor model is…


Added by Charles Blouin on January 25, 2016 at 4:27pm — 17 Comments

Ottawa Drones Dynamometer Presentation

I was invited by OttawaDrones, a group of FPV flyers and drone designers, to do a short presentation about our dynamometer. My objective was to help them make quads and drones that fly longer and are more powerful.

I decided to do an…


Added by Charles Blouin on December 17, 2015 at 2:30pm — 5 Comments

Polarization filters used to enhanced depth sensing.

The challenge for the next five years for drones is environment awareness. Drones have been doing quite well in the lab because they have precise positioning systems. Outside, drones have to rely on SLAM, which traditionally uses heavy, expensive laser depth sensors. This is why any development of low cost depth sensors will have a big impact on the future of drones.



Added by Charles Blouin on December 1, 2015 at 6:00pm — No Comments

[Tutorial] Obtaining motor and propeller efficiency for UAVs, quads and robots.

Hello fellow DIYer. Last February, my collegue and I posted a survey here asking if you'd be interested in a dynamometer for drone motors and propellers. We are now releasing the production version of the dynamometer!

For the release,… Continue

Added by Charles Blouin on November 5, 2015 at 10:00am — 19 Comments

Brushless Motor Dynamometer from RCbenchmark

RCbenchmark dynamometer website

Please comment and send feedback below. A few months ago, I posted here asking if you would be interested in a dynamometer. I received quite a lot of comments. My colleague and I had the idea of a dynamometer for brushless motor after working over one month…


Added by Charles Blouin on August 26, 2015 at 1:21pm — 15 Comments

Transport Canada to investigate ''Roman Candle Attack''

Transport Canada will investigate the use of a Quadcopter for shooting fireworks. It is again people giving unmanned vehicles a bad reputation. Shooting fireworks on someone is plain stupid, I think we can agree. However, should Transport Canada be handling this case? What if they were shooting from a radio-contolled boat or car? The danger is from…


Added by Charles Blouin on May 22, 2015 at 8:46pm — 17 Comments

Cheap and accurate close range positional tracker with SteamVR

Drones may take advantage in more than one way of the virtual reality buzz. Valve announced its Lighthouse positional tracking solution along with the HTC Vive, and more details are emerging about the inner working of the system. You can see above the…


Added by Charles Blouin on March 23, 2015 at 10:27pm — 3 Comments

Motor and propeller test jig.

My friend and I are building a small direct drive helicopter. We both have a background in mechanical engineering and we found it very difficult to obtain good specs on brushless motors and propellers. Some websites provide a results database, but these databases are frequently for a…

Added by Charles Blouin on January 14, 2015 at 4:00pm — 27 Comments

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