Arild
Active Member
Hi!
I'm trying to build a VW/Porsche engine in very small scale. The crank is ready. I found it challenging to make the cylinder's tiny ribs. they are - as the original - made in cast iron. The HSS cutting steel is only 0.5mm wide, and so are the ribs (max cutting depth is 3.5mm). The cutting steel snaps off often, so it takes times to grind a new one. But, 3 of 4 are made.. I deside to cast the connecting rods in bronze instead of steel or aluminium, so there is no need to make small bearings as this would make the con.rod larger. Now its got bearing directly.
I also deside to leave the crank as is without milling down the sides to make it ligher. I think now it will work as a part of the flywheel!
Regards, Arild (Norway)
I'm trying to build a VW/Porsche engine in very small scale. The crank is ready. I found it challenging to make the cylinder's tiny ribs. they are - as the original - made in cast iron. The HSS cutting steel is only 0.5mm wide, and so are the ribs (max cutting depth is 3.5mm). The cutting steel snaps off often, so it takes times to grind a new one. But, 3 of 4 are made.. I deside to cast the connecting rods in bronze instead of steel or aluminium, so there is no need to make small bearings as this would make the con.rod larger. Now its got bearing directly.
I also deside to leave the crank as is without milling down the sides to make it ligher. I think now it will work as a part of the flywheel!
Regards, Arild (Norway)