Uploaded June 2026 | Updated September 2026, 2 weeks ago
For years I've wanted a motor dyno that could accurately and repeatably test RC motors, ESCs, batteries, and complete power systems—but nothing on the market does exactly what I need. So I decided to build my own.
In this update, I show the newest prototype featuring custom 3D-printed components, skateboard bearings, a precision load cell, and a shunt for accurate electrical measurements. The goal is simple: create a highly repeatable motor dyno built mostly from off-the-shelf components that anyone could potentially build or reproduce.
Eventually these printed parts will become CNC-machined aluminum, but prototyping with 3D printing lets me rapidly improve the design before committing to production.
This dyno will help optimize:
RC motors
ESC firmware
Battery performance
Efficiency
Torque
Power output
Repeatable testing
The better the data, the better the motors we can build.
What feature would YOU want to see in an RC motor dyno?
👉 Follow for more RC crawling, tech, and real-world testing:
Youtube: youtube.com/holmeshobbies
Website: HolmesHobbies.com
2nd Channel: youtube.com/johnrobholmes
RC motor dyno, DIY motor dyno, brushless motor dyno, brushed motor dyno, RC motor testing, RC ESC testing, ESC tuning, motor efficiency, torque testing, RC engineering, 3D printing, load cell, shunt resistor, skateboard bearings, Holmes Hobbies, RC electronics, motor development, custom dyno, RC motor design, brushless motors, RC crawler, RC tech, engineering project, motor performance testing #HolmesHobbies #RCDyno #RCMotors #Brushless #BrushedMotor #RCEngineering #3DPrinting #RCTech #ESC #MotorTesting #DIYEngineering #RCCrawler #RadioControl #Innovation #prototype
00:00 It's FINALLY Coming Together!
00:09 RC Motor Dyno Progress Update
01:06 My Custom Quick-Change Design
01:49 How the Load Cell Works
02:52 Why I Don't Trust ESC Telemetry
04:18 Precision Current Measurement Explained
05:21 Everything the Dyno Will Measure
05:47 Plastic Prototype vs. Aluminum Final
06:03 The Real Reason I'm Building This
(if you read this far down, comment "I love Dynos")
For years I've wanted a motor dyno that could accurately and repeatably test RC motors, ESCs, batteries, and complete power systems—but nothing on the market does exactly what I need. So I decided to build my own.
In this update, I show the newest prototype featuring custom 3D-printed components, skateboard bearings, a precision load cell, and a shunt for accurate electrical measurements. The goal is simple: create a highly repeatable motor dyno built mostly from off-the-shelf components that anyone could potentially build or reproduce.
Eventually these printed parts will become CNC-machined aluminum, but prototyping with 3D printing lets me rapidly improve the design before committing to production.
This dyno will help optimize:
RC motors
ESC firmware
Battery performance
Efficiency
Torque
Power output
Repeatable testing
The better the data, the better the motors we can build.
What feature would YOU want to see in an RC motor dyno?
👉 Follow for more RC crawling, tech, and real-world testing:
Youtube: youtube.com/holmeshobbies
Website: HolmesHobbies.com
2nd Channel: youtube.com/johnrobholmes
RC motor dyno, DIY motor dyno, brushless motor dyno, brushed motor dyno, RC motor testing, RC ESC testing, ESC tuning, motor efficiency, torque testing, RC engineering, 3D printing, load cell, shunt resistor, skateboard bearings, Holmes Hobbies, RC electronics, motor development, custom dyno, RC motor design, brushless motors, RC crawler, RC tech, engineering project, motor performance testing #HolmesHobbies #RCDyno #RCMotors #Brushless #BrushedMotor #RCEngineering #3DPrinting #RCTech #ESC #MotorTesting #DIYEngineering #RCCrawler #RadioControl #Innovation #prototype
00:00 It's FINALLY Coming Together!
00:09 RC Motor Dyno Progress Update
01:06 My Custom Quick-Change Design
01:49 How the Load Cell Works
02:52 Why I Don't Trust ESC Telemetry
04:18 Precision Current Measurement Explained
05:21 Everything the Dyno Will Measure
05:47 Plastic Prototype vs. Aluminum Final
06:03 The Real Reason I'm Building This
(if you read this far down, comment "I love Dynos")
