Ship engine piston cutaway - photo

Ship engine piston cutaway.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...y_fullsize.jpg

https://diqn32j8nouaz.cloudfront.net...on_cutaway.jpg


Previously:

https://www.homemadetools.net/forum/...017#post168251
https://www.homemadetools.net/forum/...496#post166517
https://www.homemadetools.net/forum/...145#post141459
https://www.homemadetools.net/forum/...129#post120808

Rings! We need more rings!

Guessing a 2 stroke diesel from the ports at the bottom of the cylinder. I wonder why they left the rings out of the two bottom grooves?