Right now we have Kerosene, Monopropellant, and Xenon. All of those are actually monopropellants in this context!

Let's embrace authenticity and go for a few different fuel types. The engines can be configured to run off of either.

  • Kerosene and Liquid Oxygen: Roughly the same performance we have in the engines and fuel tanks now. Throttle response is slightly slow, as you need to get the turbopumps spun up.
  • Liquid Hydrogen and Liquid Oxygen: Much less dense fuel compared to Kerosene, but far higher specific impulse--390s to 430s or so. Throttle response is slightly slow, as well. Low-density hydrogen behaves so different from higher density kerosene that it really does make sense to have separate fuels. Hydrogen will boil off over time.
  • Monopropellant: Low TWR, low efficiency, reasonably dense fuel. Immediate throttle response.
  • Liquid Hydrogen: Not burnable alone in chemical engines, but it can be used as a high Isp, low thrust propellant for Nuclear Thermal Rockets, which I will describe in another post.
  • Kerosene: Not burnable alone in chemical engines, but it can be used as a mediocre Isp, high thrust propellant for NTRs.
  • Liquid Oxygen: Not burnable alone in chemical engines, but it can be used as a mid-Isp, mid-thrust propellant for NTRs.
  • Solid Rocket Fuel: Used for Solid Rocket Boosters, which I will describe in another post.
Suggestion InProgress

9 Comments

  • Log in to leave a comment
  • Profile image

    In development!

    17 days ago
  • Profile image
    3,135 mjdfx150529

    In development!

    +2 17 days ago
  • Profile image

    @AnotherFireFox That would be an interesting feature to have.

    But this is Simple Rockets, there's only so much complexity you can get.

    +2 3 months ago
  • Profile image

    Monopropellant? No! We need more variation, including gaseous hydrogen boiled off from LH!

    3 months ago
  • Profile image

    This post has been merged with this post.

    3 months ago
  • Profile image

    UPDATE

    Methane and Methane/Oxygen is also a very good propellant.

    It combines high Isp and moderate density. And it's particularly good in NTRs, as outlined in my other post.

    +4 3 months ago
  • Profile image

    @mjdfx150529 Yes, but this is Simple Rockets after all.

    3 months ago
  • Profile image
    3,135 mjdfx150529

    @AndrewGarrison this suggestion will work extremely well with my Advanced Customizable Engines!

    +2 3 months ago
  • Profile image
    3,135 mjdfx150529

    Won’t kerosene deposit soot all over the engine if you try to use it in an NTR?

    3 months ago

14 Upvotes

Log in in to upvote this post.