https://techcrunch.com/2020/05/06/spacexs-starship-prototype-successfully-completes-key-engine-static-fire-test/

SpaceX’s Starship prototype is on a streak of successes, at a key moment for the spacecraft’s development. The Starship SN4 (so-named because it’s the fourth full-size prototype) tester managed to pass a test of its Raptor engine firing while installed on the test stand. SN4 previously passed a crucial low temperature pressure test designed to emulate conditions in space, and now seems ready to take on the next phase: a short flight demonstration.

The static test fire occurred late Tuesday night in Texas, where SpaceX is developing Starship at its facilities in Boca Chica. The SN4 Starship prototype had one Raptor mounted – which is far fewer than the six engines that the spacecraft will eventually have once it achieves full operational status. SpaceX is going to be adding more as it continues its testing and development program, however, with one planned for this iteration in order to demonstrate a short, roughly 500 feet controlled flight – similar to the one achieved by the sub-scale Starhopper testing vehicle last year.