Automated Test Stand for Brushless Motors

by jollyswagman | November 25, 2016 | (5) Posted in Projects


I'd like to share a project I've been working on.  It's a fully automated test stand - just push a button and the controller does the rest!

It will run up a motor in steps taking thrust and current draw readings then upload the data directly to Google Sheets.

The prototype

The results -- all generated automatically!

Key Compontents

  • Controller: Wemos Mini ESP8266 (which has WiFi so it can connect ot Google Sheets)
  • Thrust measurement: a load cell under the motor mount
  • Current (amps): an Attopilot Voltage and Current Sensor
  • Google Sheets Script: here
  • ESP8266 code: I haven't published it to GitHub yet but will as soon as it's been cleaned up a bit!.
  • 3D Design files: see for more details

ESP8266 controller and interface board

I'm using Meccano for the frame with 3D printed parts for the mount and removable motor holders. The 3D design files are designed for 10mm tube -- either aluminium or carbon fibre.

Motors can be changed easily just by loosening one screw.

3D design


The basics work very well but as always there is more to do. 

I would like to add a temperature sensor to help avoid stressing the motors, an RPM sensor (possibly tapping into one of the motor wires; the ESP8266 is powerful and might be capable of the high sample rates required).

A simple WiFi configuration is needed for users who don't want to run the Arduino IDE in order to configure the project to connect to their access point.  Similarly the Google account and spreadsheet script needs to be simple to install and connect.

I would like to look into why my first choice for current sensor, a Hall Effect unit, produced wildly varying results.  The ACS712 based sensor produces very repeatable results and although I still need to calibrate it the results seem to be well within reasonable values.

Here is the video, if anyone has any questions please let me know either here, on YouTube or at



Ran D. St. Clair on December 23, 2016
The current drawn by these motors is very much on-and-off, so depending on the RPM of the motor and the sampling rate of the hall sensor you can get widely varying results. it's not necessarily the hall sensor itself but the circuit that is sampling its output. If you can get the sampling rate up high enough and then integrate or average the readings, you should be able to get something you can calibrate.
Log In to reply
rblubaugh on December 19, 2016
For what it's worth, I find this to be an absolutely fascinating article and the test stand is also outstanding. Now, here is the rub, for me, I am an absolute noob to Outrunner and inrunner motors, having been brought into the electric boating hobby with the "old fashioned" electric motors. No matter how much I read, I still do not understand the relative power of the different outrunner motors used on aircraft, their thrust, current usage, etc.. If someone tells me a certain motor will do thus and so, fine, I can cataloge that information but, if I want to determine information on my own that is a totally different story. This test stand and interface would enable me to determine those answers, and more. Bravo!

Log In to reply
jollyswagman on December 19, 2016
Thank you! I was the same - there's a web site at that does pretty good calculations but like you I wanted to see actual results.
My test stand would need modifications for boat props but measurements should still be possible.
Log In to reply
rblubaugh on January 27, 2017
I just had the opportunity to listen and watch, or the other way around, the Flite Test Podcast 39 in which Stefan talked about your article and video at length. He also mentioned your desire for improvements which I find exciting. I'll be looking forward to the new and improved motor test stand and I hope you include a temperature sensor to avoid any possible stress on the motor.

Log In to reply
jollyswagman on January 29, 2017
Hi Bob,
Thank you for taking the time to comment, I was really blown away by the podcast and everyone's nice comments. I'm working on several projects right now but the test stand improvements will be coming soon!
Two big improvements are top of the list - safety features as Stefan mentioned, the temperature sensor and a big one: easy setup - I know most people don't want to mess around with setting up connections and accounts (since it needs to connect to Google Sheets) so I'm hoping to make those things as easy as possible.
Log In to reply
wanabeRCexpert on January 26, 2017
same here, im completely befuddeled!
Log In to reply
HilldaFlyer on March 5, 2017
Beats the pants off what I rigged up.
Log In to reply
stefanostergren on January 18, 2017
Hey dave,
Love your article and think it is an awesome piece of information that a lot of people in the FT community will find helpful!
I had a question: Since you published the article and did some testing, is there anything that you have changed, updated or found out after your initial tests that could be updated? Reason I ask is because we are possibly looking to talk about your article in our podcast segment this week and was wondering if you had any new info!
Would love to hear back from you on this!
If your think there is some good info you could send my way then please email me at
Log In to reply
flyinggreek on January 14, 2017
Excellent unit. I am wondering if this is something you are thinking about moving into production and if so, do you have a time frame? As so many are looking for the ultimate efficiency for long range FPV and just motor matching in general, I would definitely consider purchasing one.
Log In to reply
jollyswagman on January 15, 2017
Not really since there hasn't been any interest apart from yourself!
If you have moderate skills you could make your own - I'm going to put the code and design files online soon.
Log In to reply
rockyboy on January 29, 2017
What a cool project! Please let us know as soon as you share the code and info out on github so we can start building on your excellent work here!
Log In to reply
Raushan on September 3, 2017
Log In to reply
mehndi on October 26, 2017

Log In to reply
kokaqueen on May 9, 2020
Thanks for Your gives us immense knowledge.Body massage gives you ultimate relief to your body.i would like to recommend each and everyone go for massage once in a week for ultimate relief. it will not only gives you relief but also increse your productivity.
Log In to reply
jackdehradun on July 15, 2020
Hello Guys.. Thanks for submiting this article..
visit our site -
Log In to reply
suhanihy on August 7, 2020
My name is Suhani, and that i am an Independent Hyderabad Escort. If want to satisfy me you've got just book my sensual sexual service to bring me towards your hot body. Welcome to the paramour Suhani Hyderabad Escorts Service where you'll meet and hire sexy, beautiful and charming call girls. Here you'll fulfill your sexual needs with these hotties. Forget all the strain with our special treatment by hottest females available in Hyderabad. A warm welcome to the foremost reputed and leading Hyderabad Escorts. We feel that escort services in Hyderabad are only made for your satisfaction. Our females will put their 100 and ten presents to offer you a special feel. They are lovely and also mature who is functioning currently in our Independent Hyderabad escort. For this good reason, Hyderabad Independent Escorts are going to be a flawless match for your pleasure .I am young, fashionable and fashionable Indian escort girl with all natural feminine curves, dark black hair, soft skin, beautiful eyes. So you'll see the standard of girls, they you’ll get once you book our Sexy Indian escort girls today. for more details call me 9502225211

Log In to reply
preetikaursingh12 on August 16, 2020
Hi this is Preeti Singh Kaur unique and joyful Independent Hyderabad escorts girl offering young Hyderabad Call girls service Online. Call and enjoy your hidden desires pleasure with us.
Log In to reply
bookmyescortsgirls on May 25, 2020
Looking for Young Call Girls in Mumbai then calls us now to book independent Mumbai Escorts Service for respected clients at a very low rate, avail 24/7!

Log In to reply
google-escort on September 10, 2020
Mumbai Escorts To Take Full Happiness With Hot Call Girls in Mumbai

Mumbai Escorts is really the need of a large portion of the individuals in such a furious timetable, where people groups are commonly stacked with superfluous work. Step by step, individuals are experiencing damnation part everyday issues of the spots, including, Agency just as home. All such issues of the people groups are quickly expanding, which make a cerebral pain for them, yet in addition hurtful for their wellbeing. That is the reason call Girls really go about as resource for such disappointed people groups.

Escort Girls in Mumbai Accessible Today

We grasp there are various reasons that may pass on you to this phenomenal city Mumbai. Taking everything into account, whatever the explanation, our essential work here is to promise you have a stunning and restoring time while around, whether or not you are a visitor or a close by inhabitant. Mumbai Escorts Agency is bringing a fresh arrangement of alluring figures to bring you phenomenal pleasure. It is so normal to see what we mean by investigating our show.

Our Accessible Models Escorts in Mumbai

A large portion of the Girls are wonderful and confounding. Over that, they masterminded to give the assistance of clients who looking true blue and all around mannered. Thusly, wanting to finish the cycle of all that you need as indicated by your fundamentals so surrender hold to get our sizzling hot escorts in Mumbai. Our Agency gives a fundamental method to manage get an energetic Girl which satisfies all your overview of things to get. All models looks and Mumbai celebrity Escorts Girls are open here to make some fantastic time with her and make some awesome minutes. The business combines a site that is certainly not difficult to go around and reasonable for getting staggering Girls. The escort realizes enough in offering amazing assistance. It joins an assertion giving an essential endeavor.

Log In to reply
sharmidey on February 18, 2021
Log In to reply
saanvi69 on February 22, 2021
Log In to reply
chopranancy on April 3, 2021
Agra Escorts is offering hot and electrifying Call Girls at reasonable costs with Indian models

Why Choose Our Hot Women and What we offer for clients? Each customer needs to make a more hot and life-changing second with the most delightful and beguiling young Girls. However, a few group don't know how to get the most sultry or sexy young Girl for finishing every sexual dream and investing enduring our exceptional energy. So don't stress over our Agra Escort young Girls brought to you all the more beautiful and alluring escorts young Girls for you. We give numerous sorts of Virgin call young Girls and develop bhabhi housewives who will make your day unique and extraordinary. Each man needs to invest Own exceptional energy with pretty young Girls who have a provocative figure and keen looking face. You will take all sexual benefits on the bed when you with her and get a more extraordinary erotic second with provocative Girls. We give prominent instructed and full pattern call young Girl in this field. Who makes your consistently unique or provocative as indicated by your decisions. At the point when you book the Agra's best Call Girls, you will make any kind of style with our shrewd escorts young Girls on the grounds that each call young Girl is prepared to do anything with our clients. She will well be prepared for figuring out how to enter all the five-star lodging and prepared to blend with all our customers. you need to simply advise her and begin doing a sexual suggestive talk with her. We are 99% certain that she will make your disposition extremely heartfelt and extraordinary in your room.

If it's not too much trouble, read cautiously about our Escorts Agency terms and conditions that give escorts to clients ordinarily to sexual administrations in Agra. our escorts office normally orchestrates a gathering between the customer and escorts young Girls they additionally consent to go, clients, house or lodging (outcall), or at the home of the escort in call, Some offices likewise give escorts to longer and brief spans, who may remain with the customer or travel along on a vacation trip anyplace in India. Our escort office is taking full installment prior to beginning administrations on bed. We Provide Well Educated understudy female Escort Service in Agra for all areas. Our Indian school young Girls exceptionally experienced young Girl who works in this industry as a call young Girl in Agra city region. We have certifiable quality who has been checked her 100% excessively superb Services encounters. On the off chance that you won't be happy with her administrations, we consent to discount you a half installment prior to leaving your room. We are open 365 days. So at whatever point you need our administrations then we will give you in only 30 Minutes.

Log In to reply
niharikaescort0 on April 10, 2021
Noida Call Girls are the Finest Provider of Erotic Service

Quality comes first when you think of taking a service. We too pay attention to our quality of services. Offer sensual service, we understand that any mistake can worsen your mood. Thus making no adulterated attempts we always ensure that clients always get the best taste of our service. Sensuous and beautiful Escorts fill excitement in your life that encourages you to discover all the colors of erotic rainbows. You can trust us for an authenticated service. We never believe in playing with the urges of our clients. Thus you will never find us including any sort of wrongdoing in your session.

Words like unprofessionalism, unethical behavior is out from our dictionary. We give clients the purest form of sensual service that doesn’t only increase your sensual desires but also gives you an exceptional experience of eroticism. We offer clients the finest exotic moments with no hassles to disturb your mood of having pleasure. We offer clients unfeigned services that give you a premium taste of coupling. You will always get your models in the finest form, dressed up the way you like and acting the way you wish. We guarantee you of giving quality service.

With heritage, mesmerizing scenery and lakes, Noida City Escorts stands as the favorite holiday spot for many tourists from India and abroad. This city of lakes welcomes all wholeheartedly. Ensuring that you had a great stay in this incredible place of India, we offer you Noida Escort Service to enhance the degree of your adventure. We are the one who is signified with authenticity and trust. Noid service bestowed with the best beauties gives you an amazing experience of this city. We not only serve you with sensual service but also care for clients that make their holiday mind-blowing.

Noida service comes to you in the top form. Packed with quality offers, we assure you that it is hard to find such a genuine service provider like us. We look for the complete satiation of clients. Proffering them elite class care, we always make sure that you leave this city with good memories. And choose Independent Call Girls in Noida and us for your next vacation. Our famous and the most in-demand sensual service providers. We assure you that sessions with our escorts will always glorify your memory.

Log In to reply
niharikaescort0 on April 17, 2021
Beautiful call girls in Noida provide Noida call girls agency. Noida Escorts provides 100% pure reputed escort service in Noida.
Log In to reply
ajmerescort0 on April 24, 2021
Hello, I am Alias harma, a sexy hot female who is available here, Do you like to prefer me for once to have a beautiful time with you. If you are looking for high-class, AJmer call girls is the only service that full fill your sensual desires.

Log In to reply
maxhenty4759 on April 30, 2021
Thankful such an awesome sum for sharing this glorious information! I am envisioning seeing more posts by you.
[url=]check target balance[/url]
Log In to reply
dipalsharma011 on May 17, 2021
The city is slammed full of bars and bars that will be appearing every single diversion. You’ll be amazed at fair how numerous of them there appear to be.

Log In to reply
sapnapari62 on May 17, 2021
Nice post, I am thanking you that type of post. website:

Log In to reply
ankitron369 on June 15, 2021 Fantasy Power 11 if you have a good knowledge of Cricket you Can earn real Money or Paytm Cash. Download Link And Review If You have Skills related to Cricket, Football, Kabaddi so you can Play Fantasy Cricket in Fantasy Power11 and win real Cash.
Log In to reply
urmilaroy on June 22, 2021

Log In to reply
urmilaroy on June 22, 2021
I am bustyescorts 23 years old professional model Call Girl in Jammu. well-educated tall, very fair and curvy body. I offer outcall services only to five-star hotels, confirm your hotel details first check my video check my look, and conform. I love personal and realistic way and love giving girlfriend experience as well.

Log In to reply
anchalkapoor01 on August 11, 2021
Hey Guys, I am Anchal Kapoor 22-year-old soft hearted and skilled escort. Website -

Partner Link

Log In to reply
modellovelyrani on September 1, 2021

Log In to reply
Zoya Malik on October 26, 2021
Ideal to peruse your article! I'm anticipating sharing your undertakings and encounters.

Log In to reply
sharmaparul7355 on December 4, 2021
This post is clear and simple to appreciate. I'm learning all the other than concerning this. Wish you to give more things identified with it.

Log In to reply
neeharajori23 on December 28, 2021

Welcome in Surat escorts . In this escort directory section you find Surat escorts. Surat Escorts are the most trusted escorts in Surat and this is one of the best Indian escort directories. All content and photos are regularly checked and updated with real photos.
[URL=] Surat Escorts[/URL]
Log In to reply
ches89700 on January 8, 2022,25/#post_18443!/5878470?anchor=12243382#12243382
Log In to reply

You need to log-in to comment on articles.

Automated Test Stand for Brushless Motors