- Chinese scientists have created an electromagnetic catapult for aircraft carriers using technology similar to electric vehicles
- The system can launch a plane from zero to 70 metres per second in 2.1 seconds, and at a lower cost to traditional catapults
“The new catapult system has a small footprint, simple structure, light weight and does not require a complex power supply system,” wrote a team led by Ye Lezhi, an associate professor with the school of mechanical and energy engineering at Beijing University of Technology, in a peer-reviewed paper published in the Chinese academic journal Acta Armamentarii on February 27.
Before catapulting, a high-power motor drives a heavy flywheel to rotate at high speed. Once the plane is secured on the catapult shuttle, the flywheel passes kinetic energy to a winding wheel, which then yanks the shuttle through a steel cable to apply force to the aircraft’s landing gear, accelerating the aircraft to take-off speed.
The flywheel and winding wheel never touch; instead, an eddy current clutch generates the electromagnetic force that binds them together.
To stop a plane, the flywheel’s spin is simply reversed – no extra gear needed.
Ye’s team has built a prototype, and the test results have confirmed the feasibility of the design, according to their paper.
The scientists claim this new catapult can send big fixed-wing planes skyward in just 100 metres – a feat within reach of many
decks.