How to Adapt Rocket Parameters to 2.7x Scale

[lec--]

Hi,I want to modify a mod rocket to be suitable for playing in 2.7x scale.I know the thrust, specific impulse and graded dry-to-mass ratio of the rocket's real engine.All kinds of information like this.How can I convert the real parameters into a suitable 2.7x scale?

At present, I only refer to BDB to set the engine thrust to a quarter of the actual size.But I don't know how to determine the quality of the fuel tank and how much fuel there should be.

I hope someone can tell me how to do it.thank you

[Gargamel]

Moved to mod discussion. 

[KawaiiLucy]

As for how much fuel you need in a tank, you can simply calculate the volume, and then copy the amount per volume from another mod like bdb. Balancing thrust and ISP you can do by trial and error maybe, while starting from 1/4 the irl values as you mentioned.

[Poodmund]

With respect to the larger part mods such as BDB, Tantares, Nertea's suite of mods, they are actually balanced for a scale around 2.5-3.2x. The vanilla parts are also pretty well balanced around this scale too, which you can tell because at this scale with vanilla parts, your rockets start to look the actual size/shape of real life rockets for their payload size.

Knowing this, you can refer to these parts and balance accordingly if it is easier to do this way. Otherwise it can be a lot of calculations... I'm not sure that there is a public 'calculator' sheet for this.

Edited June 26, 2023 by Poodmund