[[https://www.autoweek.com/news/technology/a36068845/opposed-piston-engines/|
Here’s Why We Don’t Have Opposed-Piston Engines—At Least Not Yet]]


[[https://youtube.com/shorts/NoOB2Kc8Kro|
How Opposed Piston Engines Work (In 60 Seconds)]]


[[https://www.youtube.com/watch?v=-vV-YaKsIGk|
The Legendary Napier Deltic - 88 Litre Opposed 2-Stroke Triangle Engine]]

[[https://www.youtube.com/watch?v=QEtFGtOU5F0|
That Deltic Drone ! The Greatest Sounding Diesel ? The Napier Necessities]]