SpaceX plans to upgrade Starship's Raptor Engines for a 20% Increase in Thrust, shares Elon Musk

SpaceX plans to upgrade Starship's Raptor Engines for a 20% Increase in Thrust, shares Elon Musk

In a leap forward for space exploration, SpaceX's Starship Super Heavy launch system is on the cusp of a groundbreaking advancement, as the company ramps up its development efforts at the Starbase facility at Boca Chica Beach, Texas, along the Mexican border. 

Starship is equipped with six Raptor engines, three sea-level engines for atmospheric flight and three designed for the vacuum of space with a much larger nozzle. The Super Heavy rocket that propels Starship to orbit has 33 powerful Raptors. SpaceX founder Elon Musk recently suggested that a future iteration of the spacecraft might feature 9 Raptors instead of only six, to increase its mass to orbit capabilities. 

Raptors are fueled by 'Methalox', a combination of cryogenic liquid methane and liquid oxygen which is a unique fuel in the rocket industry. V2 is the second iteration of the engine, it has less visible plumbing/wiring & is more powerful. The Starship/Super Heavy prototypes that are undergoing preflight testing to perform the second flight attempt to orbit this year, are equipped with Raptor V2 engines. V2 is lighter than the previous V1; Raptor V1 has a mass of 2,000 kilograms (kg) and V2 of 1,600 kg. V1 generated around 185 tons of thrust and the current V2 generates around 230 tons of thrust. V2 production cost is around half of V1. SpaceX aims for the cost-per-tonne of thrust of each Raptor to be under $1,000 — so around $250,000 to produce. The third version of the Raptor engine (V3) reached a new thrust record a couple months ago. “Raptor V3 just achieved 350 bar chamber pressure (269 tons of thrust)," shared Musk. “Starship Super Heavy Booster has 33 Raptors, so total thrust of 8877 tons or 19.5 million pounds,” he said on May 13. Starship is destined to be the world’s most powerful rocket in history! 

Musk recently shared some new details about plans to upgrade Starship's Raptor engines. "Looks like we can increase Raptor thrust by ~20% to reach 9000 tons (20 million lbs) of force at sea level. And deliver over 200 tons of payload to a useful orbit with full & rapid reusability," he shared via [social media]. "Starship payload is 250 to 300 tons to orbit in expendable mode. Improved thrust & Isp from Raptor will enable ~6000 ton liftoff mass," Musk said. The enhanced thrust and increased specific impulse (Isp) derived from the Raptor V2 engines will further elevate Starship's capabilities.

With this capability Musk's inspiring vision for a multiplanetary future is viable, as he envisions 50 rockets launching every 3 days on average, contributing to an annual payload capacity surpassing a megaton of cargo to orbit. This colossal endeavor holds the potential to facilitate the construction of a self-sustaining city on Mars, a testament to SpaceX's audacious goals. "[...] 50 rockets flying every 3 days on average enables over a megaton of payload to orbit per year – enough to build a self-sustaining city on Mars," he said.

SpaceX's commitment to Starship's development has been significant, with an estimated investment of around $3 billion in the current year alone. This robust investment underscores Starship's role as a linchpin in SpaceX's grand plans, including the deployment of the next-generation Starlink satellites and NASA's lunar exploration ambitions set to materialize by 2025.

The upcoming second orbital flight attempt will mark a crucial milestone for SpaceX. The company's confidence has increased, with Musk expressing a 50% probability of success for this attempt—a notable improvement from the first endeavor. This heightened optimism is rooted in a thorough and exhaustive overhaul of the spacecraft. Musk revealed that "well over a thousand changes" have been implemented since the last flight test, resulting in a significantly improved probability of achieving orbit.

The trajectory of SpaceX's Starship development journey is poised to reshape the future of space travel and exploration, exemplifying humanity's unrelenting drive to push the boundaries of possibility.



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Featured Images Source: SpaceX / Raptors photo by Evelyn Janeidy Arevalo 

About the Author

Evelyn Janeidy Arevalo

Evelyn Janeidy Arevalo

Evelyn J. Arevalo joined Tesmanian in 2019 to cover news as a Space Journalist and SpaceX Starbase Texas Correspondent. Evelyn is specialized in rocketry and space exploration. The main topics she covers are SpaceX and NASA.

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