v12 RC Engine Model Construction

v-12 engine with compressed air injection,hand made using taditional methods:12 cm3 of displacement,the diameter of the cyllinder is 11,3 mm,the stroke of the pistons 10mm,it works with only 0,1kg/ constructed with stainless steel,aluminum and dedicate this engine to his grandchildren:Sara,Carmen,Jose and engine is for education,exhibitons,etc.,that is the reason to work with compressed air, to avoid has made the plans and all parts, except the engi