Source-checkedWeapons, items & crafting

Helios PJ-3-S Piston Jolt [superseeded]

by Major Jon · for Space Engineers

[Vanilla|"Survival Ready"|Subgrids|No Scripts] Superseeded by this one: https://steamcommunity.com/sharedfiles/filedetails/?id=2407655607 A piston gun that propels a small projectile through magical…

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6 yr agoLast updated
Steam WorkshopSource

About Helios PJ-3-S Piston Jolt [superseeded]

From Steam Workshop

[Vanilla|"Survival Ready"|Subgrids|No Scripts] Superseeded by this one: https://steamcommunity.com/sharedfiles/filedetails/?id=2407655607 A piston gun that propels a small projectile through magical…

[Vanilla|"Survival Ready"|Subgrids|No Scripts]

Superseeded by this one:

https://steamcommunity.com/sharedfiles/filedetails/?id=2407655607

A piston gun that propels a small projectile through magical piston jolting. It breaks the speedlimit (in vanilla) and reaches around 320 m/s ± your ship speed. It's completely stable and doesn't create any torque on ships.


The J-3-S piston jolt propels it's projectiles by retracting pistons while they are attached on both ends. When one end is released, the piston head will snap back and take the projectile with it. This mechanism was discovered originally by [url=https://www.youtube.com/watch?v=soJR9cEViDQ]Alysius[/url] a few years back.

The speed limit is broken by exploiting a bug. The projectile is on a subgrid that is connected with one rotor head to two rotors at once. This somehow makes the game not realize the subgrid has actually been detached when it get's separated and it won't check it's speed as it thinks it's still a subgrid. This was originally discovered by [url=https://steamcommunity.com/sharedfiles/filedetails/?id=2158396877]YINKY[/url].

Piston Guns are generally very unstable and create a lot of ghost torque, [url=https://steamcommunity.com/id/akaalexandermax/myworkshopfiles/?appid=244850]akaalexandermax[/url] figured out a way to make them stable by clamping the pistons between two rotors.

I combined all that and did a bunch of extra engineering to make the speed limit breaking tech not mess up the stability.

[h2]The result is this:[/h2] a stable piston gun for ships that fires projectiles at 320 m/s in vanilla.

It technically works in survival, but it's pretty much impossible to build it, because of the double rotor. The projectiles self terminate after around 4-5 km (12 s). This is, because the ship they are fired from will behave very weirdly when they get to far away. Also once they are more than 5 km away, there is no way of disconnecting them anymore (except launching a new one). There is also a timer to remotely detonate them.

Some stats:

-Blocks: 74 + 7 per projectile -PCU: 1164 (+215 per projectile) -Mass: 7.8 t -Projectile mass: 490 kg -FireRate: up to 20 RPM

How to use:

-Place it on your ship -Put Timer called (Piston Gun) Fire in your toolbar with 'trigger now' -Optional: Put Timer called (Piston Gun) Remote Detonate in your toolbar with 'trigger now' -Fire at will :D

Highlights

From source data

Footprint

Rated a light load on a server.

Last update

Its author last shipped an update 6 yr ago.

Helios PJ-3-S Piston Jolt [superseeded] on Nxeon

From our catalogue
One-click install
Not available. One-click install isn't available for this game's mods yet. Download it and upload it to your server in Files.
Server load
light
Smallest plan we suggest
Space Engineers — 8 GB (8 GB RAM). This follows our own load rating above, not a benchmark.
Latest build
2020-11-27, released 2020-11-27

Game versions by loader

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Workshop

From 1 recorded build of Helios PJ-3-S Piston Jolt [superseeded].

Run Helios PJ-3-S Piston Jolt [superseeded] on a Space Engineers server

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What kind of mod it is

From the catalog
Listed on Steam Workshop as “Workshop”

Weapons, items & crafting

New weapons, gear, items and the recipes to make them.

Compatibility

Game
Space Engineers

Verified at the source

  • ✓Steam WorkshopOfficial listing, checked 2026-11-01Open ↗
  • ✓AuthorMajor Jon, as published on Steam Workshop
  • ✓LicenseNot published by the sourceFree

Helios PJ-3-S Piston Jolt [superseeded], answered

Generated from the mod’s own source data.

Is it free?

Yes. Helios PJ-3-S Piston Jolt [superseeded] is free to download from Steam Workshop.

How do I add it to my Nxeon server?

One-click install isn't available for this game's mods yet. Download Helios PJ-3-S Piston Jolt [superseeded] from Steam Workshop and upload it to your Nxeon Space Engineers server in Files.

NxLabs

Run Helios PJ-3-S Piston Jolt [superseeded] on a Space Engineers server.

Deploy in about a minute from $13.99 a month, then upload Helios PJ-3-S Piston Jolt [superseeded] in Files.