I have two engines that I need optimization for. First is the 1st stage with a titan engine and can someone get the exact characteristics for it here are the conditions that the engine should have:

Engine type: Liquid

Engine Cycle: Staged

Engine Fuel: Kerolox

Stage Fuel Tank Diameter: 2m

Altitude: Sea Level (0)

Thrust Pressure: Must be minimum without it going negative

Burn Time: 25s

Bell Nozzle diameter must be below 1.95m

Engine Size is 69% (I'm serious)

Next one is the 2nd stage mage engine and these are the conditions that should be achieved:

Engine Type: Liquid

Engine Cycle: Staged

Engine Fuel: Kerolox

Stage Fuel Tank Diameter: 2m
Altitude: 7000m/7km

Thrust Pressure: Must be minimum without it going negative

Burn Time: 25s

Bell Nozzle diameter must be below 1.95m

Engine Size: 69% (2nd stage has the same diameter as 1st stage)

I also need to know how tall the fuel tanks I need to get the engines have a burn time of 25s given that the diameter of the fuel tanks for the two stages is 2m.

I'm so confused to do this on my own and I'm on mobile which makes it even worse.
Just comment the engine specification needed to make those exact conditions to happen and thank you.

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    1,176 YaMomzBox420

    @OverCAT sorry, I kinda assumed you were a noob who just wanted someone else to figure things out for them. 🤦 Still, experimentation is the best way to learn, especially in this game. Good luck with whatever you're working on

    2.7 years ago
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    4,967 OverCAT83

    Thanks guys I just resorted to what I can do best and I acquired what I wanted for the engines to do. I already knew how the customization worked I just needed to get the exact stats.

    2.7 years ago
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    26.8k Zenithspeed

    yep
    @OverCAT

    2.7 years ago
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    4,967 OverCAT83

    @Zenithspeed I know, air pressure drops as altitude increases and underexpansion or overexpansion are signs of the engine not being efficient.

    2.7 years ago
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    26.8k Zenithspeed

    just open performance analyzer and change the chamber pressure, nozzle length and throat size, etc. until you get what you want, and keep in mind that engines at different altitudes will have different performances

    2.7 years ago
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    4,967 OverCAT83

    @YaMomzBox420 I already know how to customize engines and use the performance analyzer but I want my engines to be fine tuned as possible and I'm trying to figure it out on my own but it's quite difficult.

    2.7 years ago
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    1,176 YaMomzBox420

    But you won't learn anything like that! You have to experiment, figure things out by trial and error. If someone just tells you the information you want, you won't gain any knowledge, just copy and paste like cheating in school.

    You need to play with things and figure out what they do on your own. There's plenty of help from tooltips in the game, and people like Scott Manley and the Everyday Astronaut on YouTube have a ton of great videos about everything rocket related to learn from. I mostly play mobile myself and understand the frustration sometimes, but you should use it as a strength, not a weakness.


    I'll give you a little head start: you've already figured most of it out on your own. You can select engine types, fuel types, combustion cycles, etc in the designer by using the part properties tab. If you highlight the engine with part properties open, it will show you a blue button that says "analyze performance" that you can click on to open another window that shows everything you need to know about the engine(and craft in general). You can use this to see exactly how any changes effect the engines performance. Just play around with things until you know what each thing does and go from there

    2.7 years ago

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