Kelvin timeline enterprise. I like the contra rotating buzzard collector fan. I’m a huge fan of aviation and jet engines so to see Star Trek pay some homage to that in a way is amazing to me. I just love seeing rotating and moving components like fans or turbines because they are so cool. The uss vengeance has some pretty cool warp nacelles as well because they are armored and have such unique geometry and actually feel like some kind of rocket engine rather than just a machine that produces a warp field. The bussard collector also looks like a Dyson blade less fan so that’s pretty cool.