After four successful test flights of its next-generation Starship prototypes all ended in dramatic explosions during the landing phase, SpaceX is skipping ahead to SN15, a new version of its interplanetary rocket.

Elon Musk’s company has conducted high-altitude test flights of prototypes SN8 through SN11 and has long planned to integrate what Musk has called “major upgrades” into SN15. Now the company is skipping SN12, SN13 and SN14, which were never fully assembled, and working toward a flight of SN15 as soon as Tuesday.

Musk has said SN15 “has hundreds of design improvements across structures, avionics/software and engine,” including, hopefully, upgrades to cover some of the problems that have prevented SpaceX from sticking the landing so far without a rapid unscheduled disassembly.

SN15 has already undergone some initial testing over the past week, and Musk tweeted Thursday that the aim is to launch the following week.

Road and beach closures are currently scheduled around the SpaceX Starship development facility at Boca Chica, Texas, for Monday, Tuesday and Wednesday from 10 a.m. to 6 p.m. PT (noon to 8 p.m. CT) each day. However, airspace closures are on the docket for Tuesday through Thursday, subject to a forthcoming launch authorization, according to the FAA.

Translation: don’t expect SN15 to fly any sooner than Tuesday.

SN15 could launch any time (or not at all) within the approved windows once all the required closures and permissions are in place. We usually don’t have any firm sense of when it will blast off until less than an hour before it happens (and even then, false starts are common).

So for now, keep your fingers crossed that we see SN15 fly (and land!) this week. We’ll post a live feed of the launch right here once it is available.

This post will be updated at least daily as things change, and for more incremental updates, tune into my Twitter feed @EricCMack.

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