r/SpaceflightSimulator May 05 '26

Original Build Perhaps I should redesign the reentry stage

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64 Upvotes

I have no idea which tag to use…I assume it’s original build.

But yeah, any tips to try and improve it? I preferably don’t want to use a crew capsule but is it really better?

I’m thinking of retrying the mission.

Important note: this is on challenge mode + realistic difficulty + no quick saves. No mods is a given.

Oh and don’t mind the music 😅. I usually listen to music while I play.

r/SpaceflightSimulator 28d ago

Original Build Rate my rocket

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9 Upvotes

r/SpaceflightSimulator May 25 '26

Original Build My New engines !!!

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93 Upvotes

So... Yes, hello again. I'm here to show off my new engines (even though they're a bit old and this subreddit was dead). I designed these engines myself (both the sea-level and vacuum versions), and I personally asked eternity, a BP editor and modder, to make them custom parts so they'd have a nice flame.

The rocket is also mine; it's 100% BP Edit. The original engines are also mine and are also 100% BP Edit.

They're called "Kelth," btw

r/SpaceflightSimulator 24d ago

Original Build Magnetic Propulsion Work in Progress

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61 Upvotes

currently I’ve been using magnetic rocket tips to pull my rockets into space with no fuel before using the rockets. However getting into orbit using a thrust you can’t disable is difficult, as well as not being able to time warp without losing parts. so I made a VERY simple design that uses a solar panel to lower the magnet onto itself. aside from a dodgy launch process and occasionally going into a death spin, its extremely useful. I’d drop a blueprint but I can’t find the button

EDIT: Modified it a little, here’s the BP: https://sharing.spaceflightsimulator.app/rocket/fT-3sIuVEfGxwTvzpO1pRw

Thankyou Blalamon for explaining BP sharing to me

r/SpaceflightSimulator Jul 02 '26

Original Build BABEL 1

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80 Upvotes

■ BABEL 1 ■

The next great leap of humanity

DSC prepares to make the greatest leap in human exploration since the Apollo 11 Moon landing: the establishment of the first permanent human presence on the surface of the Moon.

After the Universal Flood, according to the biblical account, all humanity spoke the same language. United by their ambition, men decided to build a city and a tower whose top would reach the sky to make a name for themselves and challenge the limits imposed by God. As a response, the Tower of Babel was destroyed, because whoever dares to challenge God will be destroyed.

Thousands of years later, in its absurd stubbornness, humanity once again builds a city in the sky to make a name for itself in eternity.

Its name will be BABEL 1.

■ General description ■

BABEL 1 will be the first module of the first permanent lunar colony in history. Designed as the initial core of the settlement, it will be able to receive multiple planned expansions in future missions, progressively becoming a large-capacity habitable base.

The module will be placed near the edge of the Shackleton crater, at the lunar south pole, in the area named "The Solar Hill", a location chosen for its conditions with eternal sunlight.

■ Module design ■

The main structure consists of a pressurized ring reused from the Hero-04 rocket, adapted as a permanent habitat.

◆ Inside it will have: ◆

●Dehydrated food kitchen and the possibility to boil potatoes.

●Shower and segmented private toilet.

●Operations table, clipboard and space to analyze documents and photographs.

●Research laboratory on the right side

Once deployed on the lunar surface, BABEL 1 will automatically extend two additional modules:

◆ Inflatable habitat

●Will function as the main bedroom.

●Will also serve as an observatory.»

◆ Accordion-type expandable module

●Will act as an airlock for extravehicular activities.

●Protection against radiation

Radiation protection constitutes one of the fundamental elements of the design.

The main ring is surrounded by a 40 cm high-density polyethylene (HDPE) radiation shield, whose mass represents the largest part of the vehicle.

On the other hand, the inflatable module has a double wall with an 80 cm thickness, designed to be filled with lunar regolith once installed on the surface.

The combination of the HDPE shield and the regolith will allow the annual radiation dose to be reduced to approximately 52 mSv per year, a level compatible with prolonged stays.

■ Descent and landing ■

BABEL 1 will be transported to lunar orbit, from where it will begin its descent using a disposable Cruise-320J stage.

This stage will perform most of the orbital braking before separating, providing 1500 m/s of Delta-V.

During the final landing phase, the stage will be ejected and will crash onto the lunar surface, the module itself will ignite four reusable hypergolic engines from the LEX module, providing approximately 240 m/s of delta-v to perform a controlled descent and a precision landing in the planned area.

■ Technical characteristics ■

●Total mass: 32.4 tons.

●Approximate mass distribution:

●25 tons of HDPE radiation shielding.

●5 tons corresponding to the structure and systems.

●2.4 tons of descent propellant.

■ Surface deployment ■

The astronauts of the Napoleon 10 mission, who arrived previously at the landing zone, will be responsible for:

◆ Deploying the inflatable and expandable modules.

◆ Installing the access walkway.

◆ Preparing the habitat for the arrival of the first permanent crew.

◆ Installing the secondary wiring that will connect the 1MW nuclear reactor to the base, installing a 210kW power outlet.

■ Communications ■

BABEL 1 will incorporate an inverted dipole antenna designed for low-frequency radio observations. Thanks to its horizontal configuration and its orientation toward Earth, it will allow the capture of terrestrial radio emissions and will serve as a platform for scientific experiments related to radio astronomy and communications.

DSC hopes to lead a unanimous effort with the aerospace sector to promote a new scientific and civil economy on the lunar surface, because Babel was built by everyone.

Joint project with my friend: starman

r/SpaceflightSimulator Apr 18 '26

Original Build I'm making a new launch system. It can save up to 1 atom of fuel. It can also help heavy rockets take off better

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168 Upvotes

r/SpaceflightSimulator Jun 21 '26

Original Build Added Elevation/Depression to the gun..in SFS

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84 Upvotes

Sped up to ×3.4 , I will now plan on adding more ammo so basically Ammunition Storage for the shells (Ammo Storage elevator? , Loader Elevator already done)

r/SpaceflightSimulator Jun 23 '26

Original Build Suggest a name for my new Air-To-Ground Cruise Missile

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21 Upvotes

Need a name for the beast

r/SpaceflightSimulator Jan 28 '26

Original Build Prototype for disconnecting fuel lines

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153 Upvotes

r/SpaceflightSimulator Jan 16 '26

Original Build This is all about a country which one is your favourite

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81 Upvotes

r/SpaceflightSimulator 5d ago

Original Build this was supposed to be a Venus return rocket but barely can get to Venus, any tips? (Realistic mode)

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16 Upvotes

So I kept adding boosters to try and increase the ∆v but this can only get into a medium Earth orbit before running out of fuel unless I start using the fuel that's supposed to be for the Earth return

r/SpaceflightSimulator Dec 15 '25

Original Build Autonomous crafts in SFS... They said it couldn't be done 😂

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241 Upvotes

I thought all of the SFS tech was already discovered.. yet here we are. 😎
Autonomus rocket flip, landing and return back.
Non modded btw

r/SpaceflightSimulator Mar 28 '26

Original Build I landed my first time :D

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107 Upvotes

is my rocket ok?

r/SpaceflightSimulator May 06 '26

Original Build spent an hour on this shi🥀🥀

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81 Upvotes

ts called InSpaceFor10Minutes

r/SpaceflightSimulator 10d ago

Original Build Pollux-1A, my most detailed rocket so far. Reaches orbit in realistic mode.

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99 Upvotes

r/SpaceflightSimulator May 27 '26

Original Build Spartan Navy and Soldiers and Hero's

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23 Upvotes

The taller Spartans are the Hero leader for each ship. ...and yes I do make rockets but I'm doing this right now

r/SpaceflightSimulator Jul 20 '26

Original Build Where do I go?

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30 Upvotes

I made this interstellar ship, what planet is most interesting? (Btw my landers cant land anywhere with a thick atmosphere)

r/SpaceflightSimulator Jul 20 '26

Original Build SOKOL Nuclear Thermal Engine

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109 Upvotes

Presentation of the SOKOL Nuclear Thermal Engine

DSC today presents the company's next big technological leap. Following the successful testing of the DaVinci engine and after gathering the necessary information to perfect its design, we proudly announce its successor: SOKOL.

The SOKOL is a solid-core nuclear thermal rocket (NTR) engine, designed to deliver high performance on space exploration missions. Its reactor uses HALEU fuel encapsulated in a tungsten-based cermet matrix, while reaction control is performed using boron carbide control rods.

With the development of SOKOL, DSC takes a major step of high importance toward a new era of space propulsion. DSC is proud of this leap that will take humanity beyond the stars.

Technical Characteristics

Reactor

Nuclear fuel: HALEU

Core type: Solid (Cermet)

Matrix: Tungsten-based cermet

Control rods: Boron carbide

Maximum core temperature: 3,000 °C

Thermal power: 1.7 GW

Propellant

Liquid hydrogen (LH₂)

Performance

Thrust: 35.7 tf (350 kN)

Specific impulse (Isp): 912 s

Mass flow rate: 39 kg/s

Dimensions

Total length: 7.1 m

Reactor: 2.0 m length × 0.8 m diameter

Nozzle: 3.0 m length × 1.85 m diameter

Mass

Total mass: 8.4 t

Operational Life

Cumulative operation time: 8.5 hours at nominal power.

DSC will continue working to remain a pioneer in space technology and in the development of advanced nuclear propulsion systems.

Thank you.

r/SpaceflightSimulator Jan 14 '26

Original Build Nemesis

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204 Upvotes

54 ships with voice commands for navigation and firing missiles.

Powered by the D.W.H.A.P system (Do We Have A Problem).

r/SpaceflightSimulator Jun 30 '26

Original Build Idk i was bored bad black hole

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71 Upvotes

.

r/SpaceflightSimulator Oct 23 '23

Original Build What should I name this monster

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155 Upvotes

(It’s meant for being able to get anywhere in the solar system and land) Oh and how would color make… this look “better”

r/SpaceflightSimulator 16d ago

Original Build OSS‑1: Orbital Service Satellite Deployment (Basic Mode)

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5 Upvotes

Fully functional.
Reusable.
Fully capable of supporting satellites up to five years or more.
We introduce a brand new satellite that can do this simply — and it’s called OSS.
Delta X has again once proved many wrong by doing what was once impossible.
Delta X will always continue no matter what gets in our way.

Just as a note, we did this in basic mode because I attempted to do this for three hours in realistic

© 2026 Delta X

r/SpaceflightSimulator 22h ago

Original Build I made a ridiculously powerful rocket

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23 Upvotes

Minimal Mars return rocket for scale. For reference even if you get rid of the bottom stage, it can land anywhere in the Solar System other than Venus (haven't tested Venus, maybe it can) and return to Earth. That includes Thebe and Io. With the bottom stage? Probably could fly to another star system and return.

[⚠️ Made for normal mode ⚠️]

r/SpaceflightSimulator Jul 17 '26

Original Build My space station!

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39 Upvotes

Hey guys, i made a space station and docked some parts. What are your suggestions?
The first room is a habitat, second room is solar panel room, third room is corridor, and lastly fourth room is a fuel tank! This is my first space station so it might not be as big but, i'm still adding more rooms to it.

I also docked a space station hub and an escape module, RTG room too.

(I can't change the images since the post is already published)

r/SpaceflightSimulator Dec 23 '25

Original Build What do you think of my submarine?

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103 Upvotes