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Dynamometer Development (R&D)

Development of the thrust and efficiency data for our KDE Direct UAS Brushless Motor, Electronic Speed Controller (ESC), and Propeller Blade combinations is a critical design aspect of our Research and Development.  Performance Charts are posted for each motor edition on our website under the "Technical Media" tab for each respective edition and are continuously updated as our team researches manners to replicate and more accurately simulate real-world flight conditions.  In addition, the data is directly loaded into the KDE Direct Build Your System application - an excellent resource for our clients to select the optimal equipment for their system, based on a range of detailed specifications.

KDE Direct UAS Multi-Rotor Series

KDE Direct Build Your System Application


As an Engineering-focused company based in the United States, we felt it's best to show you our latest custom-dynamometer and the critical features installed for accuracy. We recently completed our new Dyno V2 installation, with laboratory-grade equipment and custom-CNC machined components, so that we can provide the most accurate data possible to match real-life flight conditions. The entire system was qualified and calibrated at a local laboratory, and then put into use at our new HQ facility (based in Bend, Oregon). Real-life flight conditions vary greatly, depending on setup and environmental affects (humidity, altitude, temperature, etc.), so the data provided is the conditions as collected on a daily-basis at our location.



All the data is collected on a propeller-test stand, custom built to our needs. The components are:

Power Supply: TDK Lambda AC/DC Power Supply GEN 60-85 (5100W/60V/85A output capability)

Force Gauge: MARK-10 Advanced Digital Force Gauge Series 4 (25kg maximum, 10g incremental accuracy)

Linear Roller Slide: Del-Tron RS2-2

Electronic Speed Controller: KDE Direct UAS Electronic Speed Controller Series

Transmitter and Receiver: Futaba 18MZ, R6202SBW

PWM (PPM) Signal Generator: Hitec HFP-30 Digital Servo Programmer

PWM (PPM) Computer Based Signal Generator: Arduino Zero 32-Bit and LabJack U3-LV

    Thermocouple Data Logger: OMEGA OM-CP-QUADTEMP2000

    Sound Lever Meter and Data Logger: OMEGA HHSL402SD

    Oscilloscopes: Tektronix TBS1102B and TBS1052B

    Resistance Meter (mΩ): Hioki RM3544

    Environment Conditions: 72°F (22°C), 35% Relative Humidity, 3730 ft (1137 m) Elevation Altitude, 30.3 inHg (1025 hPa) Atmospheric Pressure


    The fixture was designed and built at our KDE Direct CNC facility in Washington, USA and then installed into our HQ location. The system is capable of testing all motors, from the KDE1806XF series on 7.4V up to the KDE8218XF-120 at 60V, so full capability and high-accuracy for UAS development. We not only test the KDE Direct products, but also our competitors, to make sure we are always leading the market in the latest technology and performance capabilities. Our goal is to provide the best data possible and there's always ways to argue data or the methods for collection, but here's our system and any deviations from this will provide variable results, depending on the accuracy of your own system and environmental effects.