The criticality of thrust measurement tests in aerospace
Interface is a force measurement solutions provider for many of the largest and most innovative Aerospace companies. Our instruments are used to test various aircraft and spacecraft components, including thrust testing for jet engines, gas turbines and propulsion systems.
Measuring thrust is crucial in the design and development of aircraft and spacecraft. These critical measurements are used to build and test rocket engines for launch vehicles and missiles. Thrust measurements are also essential for the maintenance and quality testing of vehicle engines and systems. By measuring thrust over time, engineers can identify potential engine problems and take corrective action before failure occurs.
Thrust measurements ensure that rocket and aircraft engines produce enough thrust to take off, fly and land safely. If an engine does not produce enough thrust, it can lead to catastrophic failure. Confidence testing also helps improve fuel efficiency and reduce emissions.
The force emitted by a thruster determines the size and speed at which a payload can be lifted off the ground. To get a spacecraft out of Earth's atmosphere or to propel a jet engine faster than the speed of sound, enormous thrust is required. Thrust must be measured precisely because if an aircraft receives too much thrust it can be damaged, and if too much thrust is used when launching a rocket, too much fuel can be used.
Interface force sensors provide extremely accurate data to assess force, helping engineers tune the engines to deliver the correct force for the size and speed needed to launch or lift the vehicle.
Thrust is measured by placing the engine on a test stand. As the rocket engine then burns fuel and produces thrust, the thrust force creates a compressive force on the load cell sensor. It involves converting a mechanical signal into a digital signal and sending this data back to the engineer via a data acquisition device, who can then evaluate, monitor and record this data.
A load cell used to measure thrust must be rated for extreme heat. A typical load cell might not provide an accurate measurement if it is used in a temperature environment that the sensor's materials cannot handle. Interface offers a wide range of load cells specifically designed for this type of testing.
To give you an idea of the performance and environment of thrust testing, you can see the thrust test of a jet engine in action on the US Defense News YouTube channel.
Application for thrust testing of jet engines
A customer wanted to conduct a static thrust test on a jet engine to accurately determine the engine's thrust, burn time, chamber pressure and other parameters and provide valuable data to fuel chemists and engineers. The company needed a high-precision load cell with excellent repeatability that could withstand thrust forces in very harsh environments. From ignition to burnout it was 1000 High Capacity Fatigue-Rated LowProfile™ Load Cell from Interface ideal for this application due to their performance.
The load cell responded to the thrust forces generated by the jet engine, and the signals were collected and recorded to create a “thrust curve” of the engine. Thanks to the performance of an Interface LowProfile™ load cell, engineers were able to rely on the data obtained from the static tests. Additionally, the repeatability of the load cell meant that the time between tests could be shortened, making static thrust testing for engines more efficient. The 9330 battery-powered high-speed data logging device collected the data for analysis.
Thrust measurement ensures safety, reliability and performance.
Interface is a long-standing provider of solutions for the Aerospace and defense industries. Here's another video to learn more about Interface's role in aerospace.