Currently it's somewhere between 50%~60% of fuel tank's volume. From what I've heard, you took this ratio based on Shuttle's LOX tank. The problem is your base was improper: LOX tank of Shuttle is not a cylinder.

shuttle

Cylindrical tanks should be able to hold at least 99% of it's volume, considering there's no practical internal structures and their wall thickness is practically negligible.

SLS

The real internal structure comes from intertank and such. Since we're flying bipropellant rockets, our fuel tank should be consisted of the actual fuel tank and oxidizer tank. Even though 60% utilization is way far small.

SLS Cutaway

A maintainer of KSP Realism Overhaul, Pap, said that 90% utilization would be a good number if people build rockets without intertanks.. Builders like me make all the intertank and such by myself, so for my kind of people the utilization should be 99% or higher. In my opinion, you can make a hidden parameter accessible via tinker panel so that players can set their tanks' utilization.

Suggestion Planned

23 Comments

  • Log in to leave a comment
  • Profile image

    I want it

    19 days ago
  • Profile image

    And by the way, the wet/dry mass ration of tanks in the game are very realistic

    2 months ago
  • Profile image

    Nope, the tanks in the game are 90% realistic. A lot of space in the tank is taken by additional equipment such as electronics, pressure tanks, fuel lines, empty space, and other spacetrash. And this is impossible to make a fully cylinder tank because there are will be stress concentrators. So, in game pills-like tanks in cylinder model. Developers aren't stupid to make such a mistake. When I tried to calculate rocket tanks I made the same mistake as you made. My tanks carried much more fuel than all real.

    2 months ago
  • Profile image

    我觉得因为缩小了天体的比例,也会缩小逃逸速度和燃料

    2 months ago
  • Profile image
    150 RebelKm

    @thedarkguns That why I dont like the OG galaxy that comes with it... I like the realistic add on. I just make my tanks giant and tinker them to the size I need.

    6 months ago
  • Profile image

    Thats because droo is 57% smaller than earth... i think

    6 months ago
  • Profile image
    5,145 Insanity

    @25loed you wont be able to fix it, as you would need unity to alter stuff scripted into the game.

    8 months ago
  • Profile image
    1,252 Pepethecat

    Its true, it mostly makes Hydrolox useless for me due to it's density. Another thing is it affects my replica's performance since they are usually to scale and 0.6x sized for the sake of the smaller solar system. My SLS requires the second stage to use methalox (when in real life they use hydrolox) for it to even reach the moon cause of the fact that the tanks only hold 50-60% fuel which is outrageous. Just seeing the tank hulls in images and references shows you that it is NOT 40% tank and at worst 15% probably on those insulated tanks, you dont really need math to figure this one out.

    +3 9 months ago
  • Profile image

    To give a specific example I tried to mock up the SpaceX starship and had to go from 9m diameter to 12m diameter to get the fuel mass right. That comes out to ~56% of the fuel I "should" have at that volume.

    +1 10 months ago
  • Profile image
    5,751 Zeta

    @AnotherFireFox lol...

    10 months ago
  • Profile image

    @PorkyClown3 just use my mod >_>

    Actually, I figured out this is nothing but a single word in the code. If you delete (1-Overhead) in the code you can use whole internal volume. Considering this is so easy to resolve, I believe Jundroo don't want to alter this.

    10 months ago
  • Profile image
    5,751 Zeta

    I hope they prioritize this

    +3 10 months ago
  • Profile image

    @25loed I'm making the mod of it with some fellows like pedro and aram. You can beta test it if you want.

    10 months ago
  • Profile image

    @25loed Liquid hydrogen has the most low density among the rocket fuels. You can't change this. If you want to use LH you need the gigantic tanks.

    10 months ago
  • Profile image

    @PointBreak or I can directly change the capacity.

    +1 one year ago
  • Profile image

    You could change the fuelpercentage value to 0.99/0.6=1.65.

    +1 one year ago
  • Profile image
    1,948 MVP13

    @AndrewGarrison

    +2 one year ago
  • Profile image

    spread the word far and wide

    +2 one year ago
  • Profile image
    6 yopo

    Yes, I've been suggesting this for quite some time! Just not as articulately as you have, well done! :)

    +1 one year ago
  • Profile image
    5,145 Insanity

    @AnotherFireFox true, would still be cool though

    +3 one year ago
  • Profile image

    @Insanity that can be tricky. You need fuel and oxidiser density respectively. Some fuels need to be pressurised and some don't which means different endcaps.

    +1 one year ago
  • Profile image
    5,145 Insanity

    Another thing would be to have a rough overlay of theoretical bulkhead placements inside the tank when selecting it kind of like we have with the gyroscope.

    +4 one year ago
  • Profile image

    @AndrewGarrison

    +1 one year ago

60 Upvotes

Log in in to upvote this post.