Figure 3. K = 2.5: The Braking force F retarding the moving sheet is modulated at a wavelength ( F = 8920 kN +- 12%)

From

How Choosing Precisely the Secondary Length of an Electromagnetic Catapult Could Prevent Vibrations

Jean-Pierre Pascal

American Journal of Electrical and Electronic Engineering. 2019, 7(2), 26-33 doi:10.12691/ajeee-7-2-1