modelengine

noun
UK /ˈmɒd.əl ˈen.dʒɪn/
US /ˈmɑː.dəl ˈen.dʒɪn/

A model engine is a small copy of a real engine that people build and run for fun.

He built a tiny model engine that runs on steam.


OTHER MEANINGS

2. A software tool that creates or simulates engine designs.

The team used a model engine to test the new car design.

3. A small engine used to power model planes, boats, or cars.

The model engine in his plane is very light.

4. A teaching example that shows how an engine works.

The teacher showed a model engine to explain pistons.