Aircraft Monitoring System

Real-time flight analytics to accelerate your electric aircraft development.

The AMS (Aircraft Monitoring System) comprises a thrust and torque sensor (TNT-Meter) connected to onboard electronics, enabling real-time recording of flight and engine parameters. Designed to quantify aerodynamic and propulsion efficiency, the AMS aims to optimize overall aircraft performance, increasing pay-load capacity, range, and endurance. Compatible with all types of electrically powered aircraft, including UAVs, VTOLs, and airplanes, the AMS provides versa-tile monitoring capabilities for enhanced operational efficiency.

Real time thrust and torque measurement

We developed a lightweight and rugged sensor designed to be mounted between the aircraft structure and the motor. It measures both torque and thrust from the motor–propeller assembly. Connected to our data acquisition electronics, it allows for the combination of multiple measured variables to accurately derive the overall system efficiency.

Easy integration – compact, lightweight, robust

We designed a lightweight and compact data acquisition unit to record all flight parameters and compute real-time performance and efficiency metrics throughout all phases of flight. Data can be stored onboard and/or streamed live to the ground for immediate analysis.

A complete range for every application

Our current range of TNT sensors have the following load capacities. Different load capacities can be studied on request.

Model	Thrust	Torque
TNT-050-02	50 N	2 Nm
TNT-100-05	100 N	5 Nm
TNT-250-15	250 N	15 Nm
TNT-500-30	500 N	30 Nm
TNT-750-50	750 N	50 Nm

TNT-100-05

Thrust and torque sensor, with a range up to 100N on the thrust and 5Nm on the torque.

TNT-250-15

Thrust and torque sensor, with a range up to 250N on the thrust and 15Nm on the torque.

TNT-500-30

Thrust and torque sensor, with a range up to 500N on the thrust and 30Nm on the torque.

TNT-750-50

Thrust and torque sensor, with a range up to 750N on the thrust and 50Nm on the torque.

The AMS can be used on different aircraft sizes. This estimation is based on the ratio Mx. Thrust / Mx. Weight:

> 0.4 for fixed wing aircraft
> 2 for multirotor aircraft

	WAirplane [kg]	Wmultirotor [kg]
TNT-050-02	13	25	10	15	20	25
TNT-100-05	25	51	20	31	41	51
TNT-250-15	64	127	51	76	102	127
TNT-500-30	127	255	102	153	204	255
TNT-750-50	191	382	153	229	306	382

	WAirplane [kg]		Wmultirotor [kg]
Model	1-Engine	2-Engines	4-Engines	6-Engines	8-Engines	10-Engines
TNT-050-02	13	25	10	15	20	25
TNT-100-05	25	51	20	31	41	51
TNT-250-15	64	127	51	76	102	127
TNT-500-30	127	255	102	153	204	255
TNT-750-50	191	382	153	229	306	382

Full flight analysis

Our system continuously analyzes sensor data in real time, combining mechanical (torque, thrust), electrical (current, voltage), and aerodynamic (airspeed, attitude) measurements to compute key efficiency metrics. At any moment during the flight, you can evaluate motor efficiency, propeller efficiency, drivetrain losses, and overall system performance. This enables rapid identification of performance gaps and validation of design choices under real-world conditions — from takeoff to landing.

Direct comparison

With AMS, comparing two aerodynamic designs or propulsion configurations is straightforward. By flying the same mission profile twice — once with each setup — you can directly compare key performance indicators such as thrust-to-power ratio, propeller efficiency, system losses, and flight dynamics. This real-world A/B testing approach enables data-driven decisions, revealing which configuration truly performs better under identical flight conditions.

Computed accuracy (fixed wing aircraft)

The computed accuracy is determined analytically from sensors manufacturer datasheets assuming that the wing area, the total wetted area, the flight weight, the wing aspect ratio and the Oswald efficiency factor are known.

Accuracy
Electrical efficiency	1.80%
Propeller efficiency	3.02%
Aerodynamic efficiency (Cfe)	2.53%
Lift Coefficient (Cl)	2.00%
Rate of climb	0.25%

Sensors specifications

The table below lists some of the technical specifications of the different sensors used on the current version of the electronic board.

Sensor		Mn Value	Mx Value	Accuracy	Resolution
TNT-050-02
- Thrust	N	-50	50	0.10%	0.01
- Torque	Nm	-2	2	0.50%	0.001
TNT-100-05
- Thrust	N	-100	100	0.10%	0.01
- Torque	Nm	-5	5	0.50%	0.001
TNT-250-15
- Thrust	N	-250	250	0.10%	0.01
- Torque	Nm	-15	15	0.50%	0.001
TNT-500-30
- Thrust	N	-500	500	0.10%	0.01
- Torque	Nm	-30	30	0.50%	0.001
TNT-750-50
- Thrust	N	-750	750	0.10%	0.01
- Torque	Nm	-50	50	0.50%	0.001
Temperature	°C	-20	45	1°	0.01
Pressure	Pa	30 000	110 000	0.12%	0.01
Differential pressure	Pa	0	2000	1%	0.01
Voltage	V	0	36	0.15%	0.01
Current	A	0	55	0.15%	0.01
Density				3.33%	0.01
Load factor	g	0	4	1%	0.01
GPS position				2m	0.1
GPS heading	°			0.3°	0.01
GPS vertical speed	m/s	0	500	0.05m/s	0.01
Air speed	m/s			2.92%	0.01
Engine RPM	rpm			1%	0.01

AMS - Technical specifications

Thrust / Torque sensor	Dimensions	050-02	Diameter	74 mm
			Lenght	20 mm
		100-05	Diameter	81 mm
			Lenght	23 mm
		250-15	Diameter	103 mm
			Lenght	27 mm
		500-30	Diameter	110 mm
			Lenght	32 mm
		750-50	Diameter	122 mm
			Lenght	36 mm
	Weight	050-02	79 g
		100-05	106 g
		250-15	232 g
		500-30	309 g
		750-50	453 g
	Protection	IP 54
Electronics enclosure	Dimensions	93 × 73 × 26 mm
	Weight	95 g
	Sampling rate	0,1 – 100 Hz

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