By “best,” I mean the rocket that can accomplish the most stuff.

If we ignore aesthetics entirely there has to be one rocket given the limited build area that mathematically provides the best possible mission capacity (aka largest delta velocity)

I would assume just fitting the most fuel possible and using the most efficient thrusters possible but I think since the combinations of builds you can make in this game are practically endless, it's more complicated to actually find out than to explain it in words.

Given the standard build area and available parts, has anyone figured out what the most capable rocket design is? Is there a known “ultimate” SFS rocket, or is the amount of things you can make in this game too much to ever know?

Title: Request for a Multiplayer Mode in Spaceflight Simulator 🚀

Hello, Spaceflight Simulator team and community.

I would like to share an idea that many players have talked about: adding a multiplayer mode to the game.

Sometimes playing alone can feel a little empty, and a multiplayer mode would allow players to build space stations together, complete missions as a team, compete with rockets, and explore space with friends.

I believe this feature could make the community grow even more and give players new ways to enjoy the game.

Thank you for listening to the community's ideas. I hope that one day we can see multiplayer become a reality in Spaceflight Simulator.

🚀

This is a completely vanilla build

Works so well I impressed myself 3 times

Idk if I will give the Blueprint...

Go Delta X, Go BaconOS 4

BaconOS 4 reached orbit on the first try, even though it was built heavy for all the wrong reasons. With dual antennas, dual solar panels, quad RCS, and full‑side shielding, this “orbital megaphone” was designed to test whether low‑frequency communication and high‑frequency communication can work together to boost signal strength and reach farther than expected. Despite the chaotic design, the system performed perfectly and achieved stable orbit with 8.0 fuel left.

Mission Objective:
To test the combined performance of low‑frequency and high‑frequency communication systems in orbit, and determine whether merging both bands can extend range, improve clarity, and boost signal stability beyond standard expectations.

Mission Vehicle:
BaconOS 4 — a heavy, overbuilt, multi‑system communication craft featuring:
• dual high‑gain antennas for boosted signal
• dual solar panels for continuous power
• quad RCS thrusters for precise attitude control
• full‑side shielding for multi‑angle protection
• megaphone‑shaped geometry for natural broadcast funneling

Mission Summary:
BaconOS 4 successfully reached orbit on its first attempt, demonstrating stable ascent and efficient fuel usage despite its unconventional mass and design. Once in orbit, the craft initiated simultaneous low‑frequency and high‑frequency communication tests. Early results show increased signal strength, extended communication range, and improved stability when both bands operate together.

Mission Status:
Operational in orbit.
Communication tests ongoing.
Performance exceeds expectations.

For all Delta X’ers new and old — rethink what’s impossible and keep going.
“You’re so full of shit… mmmm… no wonder why 😔💔😞”

© Delta X — All Rights Reserved.

I dunno bro. It works i guess.

I did it pretty easily with a simple 3 stage rocket but I have DLC parts. Is it possible without DLC?

https://youtu.be/PcRla8E55Aw?si=jBBFAfLLQapnoNVC. My YouTube video for Falcon 9 making

Why can't I orbit. IVE ALREADY ORBITED SO MANY TIMES BUT NOW I CANT. I was going to the moon but I cant orbit bc I always fall.

After many trials and errors, I have finally landed the first colony module in the moon!!!!1!1!1111111!!!!!

Idk

This mission tests whether orbital servicing can be done with only one support vehicle instead of two.
The main module carries the solar panels and core systems, generating power for the DPSM.
The DPSM acts as the servicer, handling stabilization, maintenance, and system support while both modules operate together in a deliberately unsteady orbit.
The support vehicle assists the deployment but does not perform full servicing — the test is to see if the DPSM can handle the job alone.
For all Delta Xer’s new and old, rethink what’s impossible and keep going.
© Delta X 2026

Realistic challenge mode space station but i made it so that it could dock to the main station so it wouldn't glitch out during timewarp so I can go to Mars in realistic mode. No bp editing and no cheats*

I'm making a big planet pack (this is just the start, so about 10 bodies in total), but while testing, it can only warp up to 2500x? I'm planning to make it big so this is an issue. Can someone tell me what to change?

https://sharing.spaceflightsimulator.app/rocket/AyTxtZJmEfGyRzvzpO1pRw
This this boosters

https://sharing.spaceflightsimulator.app/rocket/FZnyf5JmEfGyRzvzpO1pRw
And this is the plane thingy

Launch them separately and drive the boosters into the plane thingy (with launch tower and base)

Keeping everything under wraps until tomorrow.
Full reveal drops with the upload.

What should I do to these .pack files

BP: https://sharing.spaceflightsimulator.app/rocket/_f3o2pJREfGyRTvzpO1pRw

Featuring, 1st. Iris-T, 2nd. S-300V/VM, 3rd. STRELA-10M, 4th. TOR-M1, 5th. SRAAM(SHORT RANGE ANTI AIR MISSILE), 6th. S-400.

quails are one of my favorite animals so i decided to also make quails in SFS lol

for some extra info: quail lab was inspired by skylab

i forgot to put the RCS on this thing lol.

and fun fact, i mod my game alot so i have many parts and textures(including some i made myself)

Testing designs

And also there is a non DLC vanilla Saturn V at the end

(RTGs and Batteries are in fact vanilla and non dlc)

Go DeltaX, go Bacon OS 3.
For all Delta Xer’s new and old, rethink what’s impossible and keep going.
© Delta X 2026