I am currently flying Imperial courier and I am very happy with it. I was checking the outfitting setups on the edshipyard.com and I start to wonder, would it give me the better armor if I buy two hull reinforcment modules, 190 armor each, and use Lightweight Alloys instead of Military Grade Composite?

Currently I am using Military Grade Composite bulkheads with no hull reinforcement modules, and it looks like it gives me 280 armor and it waight 8t. While with Lightweight Alloys I would have 144 base armor (no additional weight), and I could buy two hull reinforcement modules (4t each). This set up would give me 524 armor and it would weigh the same as Military Grade Composite bulkheads.

So my question is, "does it really work this way?" Does the hull reinforcement module give the same armor as bulkheads or is it calculated differently?

  • 1
    Your question may require a more refined answer, but this question will tell you more about how armor works
    – Dpeif
    Feb 5, 2016 at 4:58

1 Answer 1


So my question is, "does it really work this way?"

Yes. The bulkheads raise your ship's hull points by a percentage of its base health, while the hull reinforcement package raises it by a flat absolute value, which in this case is higher for the same mass. The trade-off cost is in the highly limited internal module slots.

Specifically, for Military grade composites, the increase is +250% (though for the free lightweight alloys it is already +80%). The Imperial Courier's base armor health is 80, which is raised to 144 (+80%) by the stock lightweight alloy bulkheads. Upgrading these to military grade composites raises it to 280 (by changing the +80% to +250% instead).

The 3D hull reinforcement (as of this writing) gives +260 health for 4t, while the 2E gives +150 health for 4t. These are the only four-ton packages fittable on the Courier, so in different combinations I'm getting 444, 554 or 664 hull points for your second build (maybe things were rebalanced over the years since you got 524).

Still, though, if you are going to hull-tank you might as well go for both the bulkheads and the reinforcement. The 8t increase has only a small impact on sublight speed and jump range.

  • You may want to mention the increases to damage resistances that Hull Reinforcement Packages also provide.
    – Izzy
    Apr 26, 2022 at 13:39
  • That's true; I wasn't taking engineering into account. Engineered HRP modules can increase resistance, which makes ALL of the ship's armor (not just the module's own) effectively stronger against specific damage types. Apr 26, 2022 at 14:21
  • Even non-engineered HRP modules provide a small amount of damage resistance (0.5-2.5%, depending on class).
    – Izzy
    Apr 27, 2022 at 14:48

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