It's not the turbojets, Kerbin physics is 'spooky'. All the engines are unrealistic because they are grounded in spooky; airbreathers extra-so I've been playing with similar ideas (ramjets/scramjets/AAR), but I have now accepted the opposite goal to the OP: Interesting spooky Kerbin-flavored ram-compression engines that have a niche I tried realistic, but the universe spat them out. Now I try fun/interesting This is the kind of contortion we should realistically be involved in with hypersonic turbojets:
Part of my initial goal was modeling the blackbird engines (ain't we all?), but I found that dropping in the right numbers made really weird things happen, so I had to Kerbal-ify it. A placeholder ramjet based on data from ramstats - and a healthy dose of Kerbalization. I enjoy this ramjet topic, and I want to collaborate before I release anything stupid, so please crit - just be aware my goal is 'interesting' not realistic. The scramjet on the tail there was stupid-stupid-'interesting' (press Z to melt engine), so I'll keep that under wraps for now. NB: If you want to play with intakes, try very high and very low mass intake parts. Big mass parts (EG NASP style lifting body) with modest intakes act like drogue chutes, very light intakes (besides being cheaty airhog stuff) suck in lots of air without contributing much to drag. *spooooky* Yep, changing the air ratio and increasing ISP are the two ways to make an airbreather suck less air, and that's the more direct one. Great idea. Kyklops: nice, thank you for sharing PS: Bonus fun, how far can you skip off the atmosphere and into deep space with my ramjet?