[Blog] I build Space X starship in CoaDE

Here the results of my Raptor Engine Mk1 Vacuum build

Exhaust Velocity: 2.91 km/s
Thrust: 1.81 MN
Thrust: Mass Ratio: 525

Crew Required: 0.2

Oxygen-to-Methane Ratio: 3.60:1 (by mass)

Thrust Power: 2.62 GW
Mass Flow Rate: 650 kg/s
Mass 351 kg
Cost 5.79 kc

I also understand that not everyone like steam, so I'm listing my inputs here as well, just remember that I'm using Echo mods for materials.

Here is the input

Reaction: LOX methane
Stoichiometric Mixture Ratio: 0.903

Thermal Rocket
Chamber Composition: Zirconium Carbide
Throat Radius: 6.60 cm
Chamber Wall Thickness: 1.50 cm
Chamber Contraction Ratio: 2.10
Nozzle Expansion Ratio: 80
Nozzle Expansion Angle: 33 deg
Regenerative Cooling:0%

Injector
Composition: Aluminum
Pump Radius: 32.0 cm
Rotational Speed: 212 RPM

Gimbal none or off
Gimbal angle: 0 deg

Ok, for the final part I made propellant tanks that have a ratio of 3.60 oxygen to 1 Methane.

The tanks plus the crew module and engines needed to match the dimensions given for space X's Starship.

Then I turned the radiators for the crew module and powerplant into the wings of the ship, to give the same look as we see from photo form space X. I h used 2 3.51 kW Radioisotope thermoelectric Generators to meet the 7.03 kW power needs of the crew module. 

The final ship for me had the following

Length: 48.7 m
Hull Diameter: 9.02 m
Total Diameter: 23.4m
cross Section: 415 m²

Delta-v: 1.45 km/s
Oxygen, Methane

Mass Ratio: 1.65
Wet Mass 995 t
Dry Mass 604 t

Acceleration: 1.11g
Dry Acceleration: 1.83 g
Total Burn Time: 1m 40s
Turnabout Time 15.4 s

Crew is 23 out of 23 which I have listed above.

Power: 6.63kW / 7.03kW 

Heat: 21kW - 42.5MW (last part is the engines)

Mass: 995 t

Cost: 6.63 Mc

I know that it is not exactly 50 m tall, but I like how the numbers came out. So, I'm posting what I got and am working on a re-work.

I also made the tanker version.


The final ship for me had the following

Length: 49.7 m
Hull Diameter: 8.99 m
Total Diameter: 20.9 m
cross Section: 425 m2

Delta-v: 2.36 km/s

Oxygen, Methane
Methane tank holds: 153 metric tons
Methane refuel tank holds:  20 metric tons
Oxygen tank holds: 550.8 metric tons
Oxygen refuel tank holds: 72 metric tons

Mass Ratio: 2.25
Wet Mass 1.43 kt
Dry Mass 639 t

Acceleration: 772 mg
Dry Acceleration: 1.73 g
Total Burn Time: 3m 24s
Turnabout Time 35.5 s

Armor: 500 um of aluminum to hold it together and to get the Starship Space X look

Power: 6.63kW / 7.03kW

Heat: 13.4kW - 42.5MW 
Raptor engine mk1 Sea-level: 16.6 MW
3.51 kW Generator: 13.4 kW
Raptor Engine mk1 Vacuum: 25.9MW

Mass: 1.43 Kt

Cost: 3.18Mc

4.60 Kw methane auto-refueler:
hose length 130m
pump rate 689 kg/s

5.95 kw oxygen auto-refueler:
hose length 89m
pump rate 1.49 t

Here my model on starship with the mk2 Raptor Engine

Crewed Starship mk2 form Space X

Length: 50.0 m
Hull Diameter: 9.00 m
Total Diameter: 20.9 m
cross Section: 423 m2

Delta-v: 2.32 km/s
Oxygen, Methane
Methane tank holds 145 metric tons
Oxygen tank holds: 522 metric tons

Mass Ratio: 2.10
Wet Mass 1.27 kt
Dry Mass 607 t

Acceleration: 966 mg
Dry Acceleration: 2.03 g
Total Burn Time: 2m 51s
Turnabout Time 26.1 s

Armor: 500 um of aluminum to hold it together and to get the Starship Space X look

Crew is 23 out of 23 which I have listed above.

Power: 6.63kW / 7.03kW

Heat: 21kW - 61.1MW
Crew model: 8.31 kW
Raptor engine mk2 Sea-level: 31.1 MW
3.51 kW Generator: 13.4 kW
Raptor Engine mk2 Vacuum: 30.1MW

Mass: 1.27 Kt
Cost: 6.68 Mc

And here are the new engines

Raptor Engine Mk2 Sea-level build

Exhaust Velocity: 3.02 km/s
Thrust: 2.01 MN
Thrust: Mass Ratio: 221

Crew Required: 0.2
Oxygen-to-Methane Ratio: 3.60:1 (by mass)

Thrust Power: 3.04 GW
Mass Flow Rate: 650 kg/s

Mass 927 kg

Cost 20.0 kc

I also understand that not everyone like steam, so I'm listing my inputs here as well, just remember that I'm using Echo mods for materials.

Here is the input

Reaction: LOX methane
Stoichiometric Mixture Ratio: 0.903

Thermal Rocket
Chamber Composition: Zirconium Carbide
Throat Radius: 10.9 cm
Chamber Wall Thickness: 1.5 cm
Chamber Contraction Ratio: 7.40
Nozzle Expansion Ratio: 34.34
Nozzle Expansion Angle: 10 deg
Regenerative Cooling:0%

Injector
Composition: Aluminum
Pump Radius: 32.0 cm
Rotational Speed: 212 RPM

Gimbal none or off
Gimbal angle: 0 deg

Raptor Engine Mk2 Vacuum build

Exhaust Velocity: 3.14 km/s
Thrust: 2.01 MN
Thrust: Mass Ratio: 262

Crew Required: 0.2

Oxygen-to-Methane Ratio: 3.60:1 (by mass)

Thrust Power: 3.16 GW
Mass Flow Rate: 650 kg/s

Mass 782 kg

Cost 16.4 kc

I also understand that not everyone like steam, so I'm listing my inputs here as well, just remember that I'm using Echo mods for materials.

Here is the input

Reaction: LOX methane
Stoichiometric Mixture Ratio: 0.903

Thermal Rocket
Chamber Composition: Zirconium Carbide
Throat Radius: 7.1 cm
Chamber Wall Thickness: 1.5 cm
Chamber Contraction Ratio: 2.80
Nozzle Expansion Ratio: 80
Nozzle Expansion Angle: 12 deg
Regenerative Cooling:0%

Injector
Composition: Aluminum
Pump Radius: 32.0 cm
Rotational Speed: 212 RPM

Gimbal none or off
Gimbal angle: 0 deg

After analysis of a SpaceX starship, I was trying to figure out why the dry weight was so high. That when I noted that the dry weight was mostly in the propellant tanks. In fact, it was the second highest mass in my builds. I had use aluminum as default as SpaceX did not list what the what they were made out of.  

That when I checked online to see if anyone knew what they were made out of. On Quora I found someone said that SpaceX does not use carbon composite anymore and now uses 301 stainless Steel. 

As we don't have 301 stainless steels, I used Maraging Steel. If you think I should have used a different steel instead, please list it and I will make the changes and we can see the results.

Here what happens when I change the material from aluminum to maraging steel for the fuel tanks. And add A heat shield for re-enter to earth


SpaceX's Starship with Mark 1 engines



SpaceX's Starship with Mark2 Engines



I also changed the crew module for deep space travel. In other words, I redesigned the crew module so that it would not need a radiation shelter for deep space travel.

 
Inputs for new crew module

I'm working on one more rework to get what the Everyday Astronaut listed online as well as the mission to test how long the trip will be.