V 4 Engine Knex By danprima in LivingLEGO & K'NEX1,00313Save PDFFavoriteIntroduction: V 4 Engine KnexBy danprimawww.facebook.com/daniil.primacheFollow More by the author: About: likes mechenical stuff More About danprima »If you want instructables comment, it works by moving the flyweel and it moves the pistons on the cilinder