More details about next-gen 18m SpaceX launch vehicle

In summary, Elon said that they will have a 18-diameter spacecraft later. People online think it as a enlarged version of Starship/Superheavy, exactly twice the size, 10 times the power. However, there is no way that thing can even lift off ground (twice the height means one half the TWR) , and even it does, it will soon undergo a rapid unscheduled disassembly. The development of SpaceX launch vehicles, are always bigger, more power and cheaper (per kilogram launched). Starting from the insignificant Falcon 1 their first generation system, 1.7 meters in diameter and 21.3 meters tall, able to send 0.7 tons to LEO. Fully expendable, means high cost per
  • #1
Xforce
73
6
Some days ago, Elon said they will have a 18-diameter spacecraft later.
People online think it as a enlarged version of Starship/Superheavy, exactly twice the size, 10 times the power. However, there is no way that thing can even lift off ground (twice the height means one half the TWR) , and even it does, it will soon undergo a rapid unscheduled disassembly (large size means more parts, or simply larger parts as most people thought, they may not have the structural strength to stand several g’s.
The development of SpaceX launch vehicles, are always bigger, more power and cheaper (per kilogram launched)
Starting from the insignificant Falcon 1 their first generation system, 1.7 meters in diameter and 21.3 meters tall, able to send 0.7 tons to LEO. Fully expendable, means high cost per mass.
Then their second generation system, the current workhorse which is Falcon 9 /Falcon heavy. Falcon 9/H are both 70 meters tall. But the FH is basically 3 falcon 9 boosters packed together, so it gives the same height and the same generation system. The diameter of Falcon 9 is 3.7m, able to deliver 23 tons on their block 5. The FH is 3.7m*12m (3 packed together) and able to get a Tesla roadster to Earth escape trajectory or 54.4 tons to LEO. Partially, or the the first stage is reusable.
Later, there will be the third generation system ITS/BFR/Starship, 9 meters in diameter and 120 meters tall (65m for booster, 55m for the spaceship) in the newest design. It will be the most powerful rocket in human history (more thrust than Saturn V), and fully reusable, so the cost is around $7m per launch (very cheap for comparison with other rockets with similar capabilities) and gets up to 100 tons to orbit. With orbital refueling, it can get a delivery to Mars at around $140k/ton.

Let’s review the changes/ improvements for each generation and goes on.
Diameter(meters): 1.7—(*2.176)>3.7—(*2.42)>9—(*2)>18
Height(meters):21.3—(*3.286)>70—(*1.714)>120—>~150-180 (if two-staged) ~75-100 (if SSTO)
Payload to LEO (kg) : 700—(*32.86/77.86)>23000/54500—(*4.35/1.835)>100000—(*3-5)>~300000-500000
Reusability: expendable—>partial reusable—>fully reusable—>SSTO?
The image inserted is from AsteronX, I believe that a less height-to-diameter ratio fits more for a large rocket.
I have also heard that SpaceX is planning to use thermal rockets, and even fusion torch drives on their future launch vehicles.
7607965B-268D-481D-8B18-7E12E1D5063F.jpeg
 

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  • #2
When Musk says something then you better check what's kind of announcement is that. The first type - when it's already at the corner - is surprisingly reliable.
But when it's just 'sometimes in the future' then you better recall the countless artistic (I don't dare to classify them for anything else) design iterations of the BFR and shrug - let's see it fly (hop) first.
 
  • #3
Rive said:
When Musk says something then you better check what's kind of announcement is that. The first type - when it's already at the corner - is surprisingly reliable.
But when it's just 'sometimes in the future' then you better recall the countless artistic (I don't dare to classify them for anything else) design iterations of the BFR and shrug - let's see it fly (hop) first.
Well he said “probably 18m for next gen system”
Combined with the data of previous generations it makes sense
I’m sure Starship was not the last spaceship by SpaceX, it’s just the start of a new era
 

1. What is the purpose of the next-gen 18m SpaceX launch vehicle?

The next-gen 18m SpaceX launch vehicle, also known as the Starship, is designed to be a fully reusable spacecraft capable of carrying both humans and cargo to destinations such as the Moon, Mars, and beyond.

2. What are the dimensions and capabilities of the next-gen 18m SpaceX launch vehicle?

The Starship will have a height of 18 meters and a diameter of 9 meters. It will be able to carry up to 100 metric tons of cargo or 100 passengers to low Earth orbit, and up to 21 metric tons to Mars.

3. How does the next-gen 18m SpaceX launch vehicle differ from previous SpaceX rockets?

The next-gen 18m SpaceX launch vehicle will be significantly larger and more powerful than previous SpaceX rockets, such as the Falcon 9 and Falcon Heavy. It will also be fully reusable, whereas the Falcon rockets are only partially reusable.

4. When is the next-gen 18m SpaceX launch vehicle expected to be operational?

SpaceX plans to conduct test flights of the Starship in the near future, with the goal of launching the first crewed mission to Mars as early as 2024. However, the exact timeline for when the Starship will be fully operational is still uncertain.

5. How will the next-gen 18m SpaceX launch vehicle impact the future of space travel?

The Starship has the potential to greatly reduce the cost and increase the accessibility of space travel. Its large size and reusable design make it well-suited for missions to the Moon, Mars, and beyond, paving the way for future exploration and colonization of other planets.

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