Elon Musk just revealed Starship V4 totally Solves V3 Problems, even Refuelling!

Starship is designed to travel farther, carry more passengers and cargo, and support missions requiring orbital refueling. But before reaching those ambitions, SpaceX must overcome several challenges, particularly with the V3 Super Heavy Booster. That's where Starship V4 and its next-generation Raptor 4 engines come into focus. SpaceX has been preparing for this next evolution for some time, and it could address several limitations holding V3 back. So let's take a closer look at what's coming. How V4 could improve Starship, and whether these upgrades will bring the vehicle closer to its full potential, only on today's episode of GreatSpaceX. SpaceX appears to be following a clearly defined development roadmap for Starship. The V1 and V2 generations spanning 2023 through 2025 were largely experimental, allowing the the company to test new technologies, identify weaknesses, and learn from each flight. With V3 in 2026, the focus is shifting toward practical capabilities and much bigger ambitions, and this is only the beginning. Over the coming years, SpaceX could introduce several more generations as it works toward a new era of space transportation. So if you want to follow every step of that journey, be sure to subscribe to the channel. We'll bring you the latest developments and the surprises that could be waiting just around the corner. Because what we're about What we're about to discuss isn't simply another Starship upgrade. When we examine the challenges facing V3, it becomes clear why SpaceX may need a much more substantial evolution. Let's start with what V3 has already accomplished. Improvements to the hot staging system, grid fins, heat shield and other components have addressed many of the problems encountered during the V1 and V2 test campaigns. But several significant challenges remain, particularly when it comes to propulsion. Take the Raptor 3 engine. It still needs to prove its reliability across repeated flights. Engine failures during two of the first three flights discussed in our previous coverage, along with problems during boostback and landing burns, have raised concerns about its performance. Musk has also suggested that Raptor 3 currently produces around 230 tons of thrust rather than the previously discussed 280 tons. You can revisit that discussion through the link in the description and help us push the video toward 1 million views. But propulsion... But propulsion isn't V3's only limitation. SpaceX is targeting approximately 100 tons to low-Earth orbit, and Flight 14 demonstrated that part of the capability by carrying 26 Starlink V3 satellites, each weighing around 2 tons. That's impressive, but the long-term goal is to exceed 200 tons to orbit. That additional capacity will be crucial for lunar and Mars missions. Also making orbital refueling more practical by reducing the number of tanker flights needed for deep space journeys. And this is where Starship V4 enters the picture. So what can we expect? One major change could be its size. SpaceX has discussed a rocket approximately 150 meters tall and V4 could reach around 142 meters with a 61 meter ship and an 81 meter super heavy booster. That's considerably taller than previous generations, which have generally stood between 120 and 124 meters. But the goal isn't simply to build a bigger rocket. The additional space could accommodate more propellant, more engines, and a substantially greater payload. And the engine upgrades could be just as significant. According to figures discussed by Musk, Raptor 4 could produce around 300 tons of thrust per engine. Bringing total thrust across both stages closer to 10,000 tons or roughly 22 million pounds. For comparison, that's approximately three times the liftoff thrust of the Saturn V. SpaceX is also targeting a payload capacity exceeding 200 tons, potentially more than double V3's intended capability. These remain ambitious specifications and actual performance will depend on the final design. But Musk has revealed several other details worth examining. You can explore his recent posts on X for more information. For starters, V4 could feature 42 engines across both stages, including three additional vacuum-optimized engines on the ship. Super Heavy could also receive two additional engines in its inner ring, increasing the available thrust and potentially providing greater engine redundancy. Another important development concerns the tanker variant. Musk has discussed the possibility of V4 carrying up to 200 tons of propellant per tanker flight. If achieved, that could allow SpaceX to refuel a Starship for a lunar mission with just five or six tanker flights. That would be a major step toward making orbital refueling a practical part of regular space operations. And when could we see these upgrades? V4 is currently expected to make its debut in 2027, although whether SpaceX can meet That timeline remains to be seen. But impressive specifications alone won't determine whether this generation succeeds. There is something even more important, and that is reliability. To understand why, look at the development of the Falcon 9. The rocket progressed through several generations. From V1 to V1.1 to full thrust, then block 4, and finally block 5. Each introduced improvements that made the vehicle more capable and dependable. Starship will need to follow a similar path. With V4, the priority shouldn't simply be making everything bigger, it should be making the entire system more reliable. Let's start with Raptor. SpaceX must improve engine reliability without sacrificing the simplicity, low weight, and performance that makes the design so important. Its ignition system, turbo pumps, and combustion chambers must operate consistently under extreme conditions, but maintenance presents another challenge. Raptor 3's simplified design uses fewer external components and more welded connections, reducing weight, potential leaks, and overall complexity. However, that integration could also make the engine harder to disassemble and repair when internal components fail. Finding a balance between simplicity and maintainability will be critical to reducing Starship's long-term operating costs. Ultimately, Raptor must be more than powerful. It must withstand repeated launches, multiple engine restarts, and demanding orbital and landing operations without compromising mission reliability. And as SpaceX moves toward orbital refueling and lunar missions, there's very little room for error. But reliability is only half the equation. V-4 must also make Starship significantly more reusable. Greater thrust and payload capacity won't mean much if every flight still requires extensive That's why improving the thermal protection system is so important. SpaceX needs more durable heat shield tiles, reliable attachment systems, and easier inspection and replacement procedures to reduce the time required between flights. But the heat shield is only one part of the challenge. The ship must also survive re-entry, withstand extreme aerodynamic forces, maintain precise flight control, and return to the tower for a controlled catch. The long-term goal is to achieve aircraft-like turnaround times, allowing Starship to return, Undergo necessary inspections and fly again with minimal refurbishment. If successful, that could fundamentally change the economics of spaceflight. V-4 must also improve Starship's ability to operate in space for extended periods. More reliable orbital docking and propellant transfer systems will be essential alongside improvements to avionics, reaction control, and cryogenic management. Keeping liquid methane and oxygen at extremely low temperatures during long-duration missions remains a major engineering challenge. These capabilities will be vital for NASA's Artemis human landing system and future tanker, cargo, and crewed Starship variants. And there's one final piece of the puzzle, mass production. Even the most advanced spacecraft won't transform space transportation unless SpaceX can manufacture enough of them. That means producing engines more efficiently, simplifying vehicle assembly, and expanding manufacturing infrastructure at Starbase in Florida and Louisiana. Together, these facilities could help SpaceX move toward weekly launches in early 2027 and even higher flight rates afterward. But manufacturing capacity alone won't be enough. The company must also prove that it can recover vehicles reliably, turn them around quickly, and sustain a much larger launch schedule. Ultimately, Starship V4 must address three major challenges, greater payload capacity, full reusability, and long-duration operations in deep space. However, before any of these ambitions become reality, SpaceX still has several critical milestones to overcome with Starship V3, and two of the most important will be Flight 15 and the upcoming orbital refueling demonstrations using V3 hardware. The results of these tests will lay the foundation for everything that comes next. Because despite revealing its plans for Starship V4, SpaceX cannot afford to take its attention away from the current generation. V3 will remain at the center of the Starship program for months to come, potentially extending well into 2027. And that's important because V4 isn't being developed in isolation. It's an evolution of the technology, systems, and capabilities that V3 must first demonstrate. If SpaceX cannot make V3 reliable and reusable, the entire development roadmap could face delays. In other words, V3 must serve as the bridge between Starship's experimental phase and its future as an operational transportation system. It needs to demonstrate that SpaceX can catch both the Super Heavy booster and the ship using the launch tower, recover and reuse the ship after orbital flight, transfer propellant between vehicles in orbit, and eventually increase launch frequency to approximately once a week. These are not minor upgrades, they are fundamental capabilities that SpaceX must master before moving into large-scale operations. Only after these milestones have been demonstrated can the company gather the operational experience, performance data, and reliability needed to refine V4 with confidence. Rushing ahead without resolving V3's remaining challenges could mean higher costs, slower development, and greater technical risks. So what exactly should SpaceX be focusing on over the coming months? Flight 15 needs to demonstrate a major breakthrough, namely the successful recovery of both Starship stages using the launch tower. That means catching Super Heavy and, for the first time, attempting to bring the ship back from orbit for a tower catch. If successful, it would represent an unprecedented achievement in orbital launch vehicle recovery. But catching the ship is only the beginning. SpaceX will also need to inspect its heat shield thoroughly. Determine how much damage occurred during reentry and identify ways to reduce the amount of repair work required after each flight. The next major milestone will be proving that a recovered ship can fly again. SpaceX is aiming to demonstrate this capability in early 2027 while also working toward one of the most important tests in the entire Starship program, transferring propellant between two vehicles in orbit. At the same time, the company must continue addressing the remaining reliability challenges with Raptor. That includes preventing premature engine shutdowns, improving relight performance, and ensuring consistent operation throughout every phase of flight. The thermal protection system will also need further refinement, particularly if SpaceX hopes to reduce inspection and refurbishment times between missions. And then there's launch cadence. SpaceX ultimately wants to reach approximately one launch per week during the first half of 2027. Achieving that will require more than reliable vehicles. The company must also expand its production and launch infrastructure. All of these efforts are interconnected. Without reliable engines, frequent launches become difficult. Without successful recovery, rapid reuse remains out of reach. And without orbital refueling, Starship cannot fulfill its most ambitious deep space missions. Only when V3 demonstrates these capabilities will SpaceX have the foundation it needs to move toward the next generation. And that's what makes this stage of development so important as well as exciting, right? And with that, thank you for tuning in to today's episode. I'm Kevin, and I'll see you in the next one. Until then, keep looking up.