This 3D #printed #water #cooled #jetengine is so cool it hurts: https://hackaday.com/2022/05/30/3d-print.. I really would like to #experiment with jet engines at some point... Watching this #project by #integza over several years I can see that #metal is basically a #requirement at this point - but it seems like you could get away with having not much metal at all. #aluminium #cooled and built correctly could really be the way forwards with this.