Pop-pop engine (part 1)

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This is a pop-pop steam engine for use on model boats. Made with aluminum sheets, beer can, silicone rubber, copper tubes, bolts and nuts. It's quite difficult to make but it works perfectly.
I haven't provided all the exact measurements because there's just not one correct way to make this type of engine. Can be made in different sizes and shapes

Видео Pop-pop engine (part 1) канала foguista