Submarine! Submarine card! This STEAM project card uses a four bar linkage to create its parallel movement. Made from corrugated card, card and brass fastener joints, this makes a great starting point for exploring four bar linkage mechanisms. Dive! Dive! Dive! Click the images to find out more – better yet, why not buy and membership and download this and all the other projects on the site for free! Sign up for Membership here.

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