Carbureted compression ignition model engine
A carbureted compression ignition model engine, popularly known as a model diesel engine, is a simple compression ignition engine made for model propulsion, usually model aircraft but also model boats. These are quite similar to the typical glow-plug engine that runs on a mixture of methanol-based fuels with a hot wire filament to provide ignition.
Source: Wikipedia — Carbureted compression ignition model engine (CC BY-SA 4.0)