My good friend @translunaryanimus told me that EVENTUALLY^TM Sacred Estuaries would get into some sci-fi stories. Being the sci-fi nerd that I am, and also since he's helping me with some of the bio and culture aspects of my setting, I thought it was only right to help him with some of the technology aspects of his setting!
Sacred Estuaries lore stuff:
The homeplanet of the Chenesht has thicker atmosphere than that of earth, this makes human-style 'tall stick with flamey bit at the bottom' impractical. This is because the rocket has to fight against all the air at sea-level, and also because optimizing a rocket nozzle for such pressures becomes difficult. But why fight against the atmosphere when you can use it to your advantage?
Chenesht launch vehicles are always some variety of air-launcher, they use jet engines or other varieties of air-breathing engines, as well as aerodynamic lift, for as much of the ascent as they can get away with. In the case of the HALC-90 'Skyjelly', the air-breathing engines are able to get it going fast enough that it's apoapsis is out of the atmosphere, and the craft is very nearly in orbit.
After the 'Skyjelly' gets it's payload going nice and fast it's work is done and it can return to the launch-site. The launch site is located right on the planet's equator to take advantage of the planet's spin for some free speed. This site also has an ocean to it's east so any failed launches don't impact populated areas.
Kerbal Space Program stuff
Air-launchers are really fun to fly, I recommend everyone make at least one, bonus points if you can recover the launcher and payload without reloads like I did here. I maybe should've gone with Whiplash engines rather than RAPIERs for the first stage, but RAPIERs seem to have a stronger positive-feedback-loop with speed so I went with them.
Since I used RAPIERs I could probably also get the 'Skyjelly' into a circular orbit, but I removed all the oxidizer from the vehicle so no. Also I don't think the CoT and CoM line up for the RAPIERs.
I also absolutely don't need those solid fuel 'sustainer rockets', but by the point in testing where I realized that, I already used them to attach the stabilizer fins, and also just got aesthetically attached so I kept them.