Recently had the opportunity to tour the Sima powerplant [s]. They have an installation showing a broken turbine, somehow a stone got in that was big enough to

Recently had the opportunity to tour the Sima powerplant [s]. They have an installation showing a broken turbine, somehow a stone got in that was big enough to jam up the turbine, leading to the single-cast steel contraption bending and ripping. Thankfully they managed to cut off the water before catastrophic damage occurred (to the installation/people). The explanation is all the more mesmerising for being held next to two such beasts going full tilt just under the floor. You can't see the damage in this picture (from a Google search), but you get a feel for the size (some of the "hands" were bent and broken before the emergency shut-off). The black shape in the back is one of the two operating turbines: https://cdn.discover-the-world.co.uk/images/education/norway/gallery/lightbox/norway-sima-power-plant.jpg https://cdn.discover-the-world.co.uk/images/education/norway... This one looks to be taken earlier, seems one of the pieces that were torn off is on the floor: https://media-cdn.tripadvisor.com/media/photo-s/08/61/60/b0/sima-power-plant.jpg https://media-cdn.tripadvisor.com/media/photo-s/08/61/60/b0/... Anyway, this isn't a flywheel - it's "just" a turbine. [s] https://en.m.wikipedia.org/wiki/Sima_Hydroelectric_Power_Station https://en.m.wikipedia.org/wiki/Sima_Hydroelectric_Power_Sta...