http://www.bics.be.schule.de/son/verkeh ... 194_01.htm
This engine consists of three parts, as you see. But there's a problem with that: AI would buy only the first and second part (with dualheading flag) ... so my question: should I make this engine two-part (and ugly/unrealistic/silly/...) or shouldn't I care about AI and make it a real three-part engine (that would look veeeery nice in curves *g*)?
