What Does TSTO Stand For?

TSTO stands for Two Stage To Orbit

TSTO, or Two Stage To Orbit, refers to a launch vehicle design that utilizes two distinct stages to reach orbital velocity. The first stage is responsible for providing the initial thrust to lift the payload through the lower atmosphere, while the second stage takes over to complete the ascent into orbit. This approach enhances efficiency and payload capacity, allowing for a more streamlined ascent and reduced fuel usage compared to single-stage systems. TSTO designs are often considered in the development of advanced space launch systems and reusable spacecraft.