Prompted in a tweet on August 28, SpaceX CEO Elon Musk says SpaceX and Super Heavy's huge rocket – built as the most powerful rocket ever built – can ultimately be followed from the rocket many times larger.
SpaceX is currently in the process of assembling the first full-fledged Starship prototypes, 9 m (30 ft) in diameter, 55 m (180 ft), reusable spacecraft and upper stage. Two prototypes – Mk1 and Mk2 – were created in Texas and Florida at the same time, while the start of the first Super Heavy prototype apparently began to take shape on SpaceX's Florida campus.
Once completed, the Starship Super Heavy Booster will be the single most powerful rocket booster ever built, standing at least 70m (230ft) tall by itself and capable of producing up to ~ 90 000 kN (1
In less words, a full Starship / Super Heavy stack would be the tallest (~ 118 m / 390 ft), the heaviest (~ 5000 tons / 11 million pounds) and the most powerful rocket, ever assembled.
And yet, despite its size, the orbiting rocket in Earth's gravity will almost never benefit from more thrust ; more fuel; more rocket. In the light of this, Chief Executive Officer Elon Musk says the next-generation SpaceX theoretical rocket – which could potentially follow a few years after Starship and Super Heavy – could be 18m (60 feet) wide, twice the diameter to their ancestors.  Many will recall that doubling the diameter of a circle doubles its area, meaning that the theoretical Starship 2.0 would have four times the surface area and four times the volume of the tank, requiring approximately four times more thrust and makes the vehicle four times as heavy as Starship 1.0. Assuming that the Starship heir retains its fineness (height / width) ratio, an unlikely end result, but still interesting to think about, the car would measure 18m (60ft) in diameter and a terrifying ~ 236m (780ft) altitude, literally more than twice as tall as Saturn V. An 18m diameter would also make it the widest rocket ever built, with the first S-IC stage of the Saturn V measuring 10m wide and N1 " Block A 'of the Soviet Union, measuring an impressive diameter of 17 m the widest point.
If the above assumptions are correct, a very rough estimate would bind Starship 2.0's gross (nourished) mass with absorption of about 20,000 metric tonnes (~ 45 million pounds). In the event that SpaceX will use the current generation Raptor to power such a colossal rocket, the booster will need a minimum of 100+ Raptors to rise at all. Using the Saturn V F-1, still the most powerful single-chamber rocket engine ever created, Starship 2.0 will require a minimum of 30+ engines to rise, comparable to the Super Heavy's 31-37 Raptors.
For now Starship and Super Heavy are abundant in themselves ambitious, but it's no surprise to hear that SpaceX CEO Elon Musk already has some thoughts on this that could follow this next-generation rocket vehicle in the next decade. Still, it's worth noting that possibly the craziest aspect of Starship – SpaceX's extremely unconventional attempt to rewrite the rocket-book – could ultimately make the 18-meter vehicle far – Practically, assuming the company proves its methods can be used to build reliable high-performance rockets.
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