Making a 10-Cylinder, 2-Stroke Engine

Here’s one for the gearheads. Let’s Learn Something built one of the craziest engines ever. He started with ten 2-stroke engines – the kind found in mopeds – disassembled them, then welded together their blocks. He then cut the whole thing in half to insert a ridiculously long crankshaft to drive its pistons. The finished inline-10 engine is a sight to behold.