Quick Question about size and weight

[Clarkimedes]

How do you guys translate earth sized parts and fuel into kerbin sized proportions. I'm working on a mod that has a solid rocket booster. This booster on earth weighs 168,200 kilograms or approx. 185 tons, most of it fuel. This is way larger than the Kerbal stock parts. Should I resize them to fit Kerbin? Should I keep them earth sized and all proportional? What are the proper converions for earth to kerbin measurements? And finally, how much does a unit of fuel weigh in KSP?

[NathanKell]

I would say keep them 100% Earth-scaled and statted.

[undercoveryankee]

If you want parts that are useful at stock scale and balanced against stock, the rule of thumb is about a 64% linear scale. Things like mass and volume generally go as the cube of the linear scale, so a 64% scale of your booster would have about 1/4 of the full-scale fuel load.

A 45-ton SRB would fit nicely between the stock solids and KW Rocketry's big 2.5m solids.

[NathanKell]

Whereas, oddly enough, stock payloads like the pods and probes mass either their correct amount, or even much more than they do in real life.