Motor testing for drones and Unmanned Vehicles FAQ

Below is a list of frequently asked questions regarding the motor test systems related to unmanned vehicles. Should you need further assistance, contact Magtrol or your local sales agent.

What specifications are required to design an electrical motor test bench for unmanned vehicles ?


Key specifications often include the expected thrust or torque range, the motor’s maximum voltage and current, and the speed range to be covered. It is also necessary to define the permissible temperature thresholds and the sampling rate required to capture transients. These values directly determine the sizing of the sensors and the test stand’s structure.

What components are needed to conduct a professional motor test ?

A professional test stand requires force/torque sensors, a data acquisition system, a regulated power supply, and data acquisition and automation software. Typically, a temperature sensor, speed measurement, and—most importantly—a rigid, vibration-resistant frame are also included. The accuracy and synchronization between these components determine the reliability of the results.

What should you keep in mind when designing a test bench for unmanned vehicle engines ?

You must ensure that the test bench covers the full load and speed range of the engine under test, without undersizing or oversizing the sensors. As a rule of thumb the nominal values of the Motors to test shall be within 10% – 80% of the Nominal Torque of the sensor. Mechanical rigidity and vibration isolation are critical to avoid skewing thrust or torque measurements. Safety considerations (mechanical protection, emergency shutdown, containment) must be integrated from the design phase, especially for high-power motors.

How can data from the motor test bench be used to issue certificates ?

Raw data (thrust, torque, current, temperature, RPM) are compared to the thresholds defined in the specifications or the applicable standard. A compliance report is generated, documenting each measurement along with its uncertainty and the test conditions. This report then serves as technical evidence for the issuance of a certificate by the certifying body or the end customer.

What is the process for acquiring an electric motor test bench ?

The process begins with defining requirements (thrust range, motor type, budget, tests to realize, speed and torque ranges, sampling frequency and potentially additional signals to capture). This is followed by a consultation and characterization phase with Magtrol technicians. Next come the technical validation, manufacturing, and acceptance phases (at the factory or on-site). Training on how to use the system and initial calibration generally complete the commissioning process.

What is the difference between a motor test and a test of the complete propulsion system (including propeller and ESC) ?

A motor test evaluates only the motor’s raw performance (torque, RPM, heat generation) independently of any external load. Testing the complete propulsion system includes at least the propeller and sometimes the ESC (Electronic Speed Controller); it allows for the measurement of actual thrust, overall efficiency, and aerodynamic or electronic interactions. This second approach more accurately reflects the actual operating conditions on the final vehicle.

What certifications are required to integrate a motor into a UAV/UGV/UUV ?

Requirements vary depending on the application (civil, military, commercial) and local regulations, but often include electrical safety and electromagnetic compatibility (EMC) standards. For aerial applications, aviation-specific certifications (such as EASA or FAA, depending on the jurisdiction) may apply. It is recommended to verify the specific requirements with the relevant authority before integration.

What are the risks of not thoroughly testing the motor before integration ?

An inadequately tested engine may perform differently than the manufacturer’s specifications, compromising the reliability of the final vehicle. Risks include overheating, in-flight or mission failure, and significant rework costs after integration. This may also result in liability for the integrator in the event of an incident.

Is a different test bench required depending on the engine type (gasoline, electric, hybrid) ?

Yes, each type of engine has specific requirements: an electric motor requires precise voltage and current measurements, while a gasoline engine requires fuel and emissions management. A hybrid engine combines both requirements, making instrumentation more complex. The choice of test bench therefore depends directly on the engine type being tested.

Can I test multiple engine models on the same engine test bench ?

Yes, provided the test bench is sized to cover the power, torque, and RPM ranges of the various target engines. Mechanical adapters (mounts), connection panels, and software templates often allow switching between engines without replacing the entire test bench. Versatility depends on the system’s initial design.

When possible, Magtrol offers combined test stands, for example, with two mechanical systems and the same electronic data acquisition chain. We also build “multi-line” test stands that allow for multiple specific tests (cogging torque, load, back-EMF) without changing the mount. This saves time, reduces costs, and minimizes the risk of error.

What are the advantages of Magtrol’s motor test stands ?

For over 70 years, Magtrol has been providing dynamometers, brakes, and sensors recognized for their precision and robustness across a wide power range. Our expertise in test bench technology—including design, manufacturing, software, and after-sales service—enables us to continually evolve our solutions to meet our customers’ needs, whether in terms of technology, functionality, or cost. Our ability to customize test benches makes them efficient, ergonomic, and durable.

How can Magtrol help you, and what do we not handle ?

As a service provider, Magtrol offers solutions to help you successfully conduct your tests. This typically takes the form of a system incorporating Magtrol equipment (brakes, dynamometers, torque sensors, data acquisition systems, and electronics) necessary to characterize your devices. In this context, we provide the necessary consulting and design services to ensure the desired test can be performed.

However, Magtrol does not design nor do sophisticated control on the component being tested, whether it is an electric motor, an actuator, a gearbox, or any other rotating system. The company therefore positions itself as a supplier of test instrumentation, not as a systems integrator or motor manufacturer. Nor do we get involved in the final integration (e.g., into a UAV/UGV/UUV drone).

Ready for your solution? Contact us today.