Mk-33 CKAN

The X-33 was a sub-orbital technology demonstrator for the larger Lockheed Martin VentureStar single-stage-to-orbit reusable launch vehicle. It was created with the goal of significantly reducing the cost of sending payloads to orbit and to approach airline-like turnaround times between launches. Unfortunately, the X-33 was cancelled in 2001, but this specialized parts kit lets you build a similar craft for KSP. Features include:

Parts to make your own X-33 inspired (NOT A REPLICA) SSTO or something more kerbal.

Optimized for JNSQ, but works fine in stock scale- just empty the forward and aft tanks for stock scale.

Custom launchpad parts for immersive game play.

REQUIRES NO PLUGINS OR MODS, but it can support DockRotate, KSP-DepthMask, ModuleManager, Servo-Controller, Snacks, Wild Blue Decals, Wild Blue Tools, and more.