Save A Falling Egg

My second entry for this amazing challenge is a little bit similar to my first entry. Now I use totaly 5 parts, whereby four components are a part with five helical spring elements, for adjusting and fixation the egg in axial and radial direction, for eggs with different sizes. The design looks like a diving bell without a watertight sealing. A preliminary calculation for dimensioning the spring elements: Height of fall: 4,5 m Mass of egg: 0,075 kg Potential energy of egg: 3,3 J (Joule) = Nm = Ws Energy of a spring: E = c/2 * s^2 s = Spring deflection c = Spring rate For example: c = (2 * E) / s^2 E = 3,3 Nm s = 0,010 m c = 66 N/mm Such a big spring rate to realize with springs, made of plastic material, is rather improbably. However, I think, my new concept is better suitable than my first entry, to change the kinetic energy of the falling egg into the work of a spring. Spring elements are finally not calculated resp. no FEM-analysis done. The result of my design - may be, because not yet tested - is another concept only. If you fill the complete cavity of the ball with sawdust or something similar - after assembling the egg - I think that the egg has a little chance more to withstand the free fall. Model available in the following data formats: STEP-file (.stp) of the complete assembly (5 components and egg included) STL-files of the 3 components for 3D-printing Native data (.prt) and (.asm) in a "zipped" folder for users of »PTC Creo Parametric 2.0« Thank you for your attention!