The HL-20 Personnel Launch System (PLS) was a crewed spaceplane proposed by NASA in the early 1990s, intended to augment the Space Shuttle for routine space station crew and cargo missions as well as simple free-flying missions. It would have launched as a payload on top of an expendable or partially-expendable launch vehicle such as Titan III, the Advanced Launch System, or National Launch System. With its small size, HL-20 was expected to be cheaper and safer to operate than the Shuttle orbiter, and it was also to be capable of longer-duration stays at the space station.

Though HL-20 was canceled, its aerodynamic shape and thermal design was reused for Sierra Space's Dream Chaser spacecraft, which will soon begin cargo and eventually crew missions to both the International Space Station and Orbital Reef. My Dream Chaser model is also available: https://www.cgtrader.com/3d-models/aircraft/other/dream-chaser-cargo-system

The livery and TPS layout shown here is an amalgamation of those shown on various mockups and artist impressions from the time, particularly leaning on Lockheed Martin's bid for the program

All materials and textures are packed into the .blend file. Unapplied modifiers and instancing have been used to reduce file size and enable easy editing. For non-Blender users, note that the tile texture here is dependent on Blender nodes. If you need the tile texture as well, contact me for assistance