Worlds smallest V12 engine

this is unbelieveable! and yes it does work!

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The man behind the smallest V-12 engine in the world (English subtitles)
José Manuel Hermo Barreiro, "Patelo", is a pensioner from Galicia (Spain). He's a retired naval mechanic and he has built the smallests engines in the world. This is his story. Source: /en-el-taller-de-patelo-nunca-pense-que-mi-motor-daria-la-vuelta-al-mundo_K RL5bO3mk1la3gBf0ICNm3/

World's Smallest running v8 engine
Worlds smallest running v8 hand started small v8 engine.

AE 0.1CC Diesel Model Engine Micro
This is a video of the tiny 0.1CC AE diesel two stroke engine. My example shows so-so worksmanship, but the piston and liner fit was acceptable. The tank screws were filed to length and the needle was defective. The needle valve and venturi were replaced with an old Super Tigre part for an idle circuit from a carb. After sorting out the needle and compression settings it starts and runs fairly well. It doesn't make much power turning a Cox 3x1.25 prop at 18,000 rpm. The built in tank is very small and suitable for free flight. i intend to build an RC model and a larger tank to replace the stock one. Testing was done with a small external tank. These were produced by Allen Engineering in the UK in the 199's. They are not available today except for Ebay where they turn up once or twice a year at 100-200 USD.

V8 motor model 50ccm
V8-Motor built in 1992 from scratch. All parts are built by me(Søren Pedersen). Pistons ø21mm , hub 20mm runs on nomal gasolin whit 1% oil