Hi John,
Yes,the Crankcase ,Timing Gear Cover,and Sump components are all cast in Aluminium, by use of patterns made from museum engine. Cylinders cast in aluminium from ADC Cirrus 1 pattern before machining to ancestral Renault profile. Cylinder Heads laminated from 7 sections cast in silicone rubber moulds with low-temp alloy. There are no Pistons/Rods Crankshaft (centre) or Camshaft,but everything else is there in metal except wooden flywheel.The Prop shaft rotates. Pics attached of raw castings.[ATTACH=CONFIG]250395[/ATTACH][ATTACH=CONFIG]250396[/ATTACH][ATTACH=CONFIG]250397[/ATTACH][ATTACH=CONFIG]250398[/ATTACH][ATTACH=CONFIG]250399[/ATTACH]