Homemade Weapons Part 4: War Hammer/Saw Blade Slinger

About this video

ZNA Productions demonstrates three homemade weapon-style projects: a steel flail using chain and bolts, a steel ‘penguin’ striking tool designed with an X-shaped head and narrow neck to concentrate force, and a PVC compound bow with roller-skate wheel components. The episode emphasizes that these are conceptual builds created for their engineering interest rather than practical use, showcasing how unconventional materials and design principles like force concentration and leverage can be explored in a workshop setting.

Key takeaways

• Force concentration through geometry—narrowing a striking surface or creating specific impact points (like the penguin’s X-shaped head) increases pressure and effectiveness by design rather than adding mass
• Material substitution and constraint-driven creativity—using available materials like PVC, paracord, and roller-skate wheels to test engineering concepts when ideal components aren’t accessible
• Iteration and experimentation are central to DIY engineering; projects are presented as ’experiments’ to test concepts rather than finished products, allowing builders to validate ideas before refinement
• Workshop thinking prioritizes understanding the ‘why’ behind traditional designs—questioning assumptions (like why flails need spiked heads) and testing whether simpler approaches work just as well

Episode details: published September 26, 2013 · 1.8M views · 9:58 long. Summary written by Self Growth Videos from the episode itself. ZNA’s builds are his designs and experiments, covered here as commentary on the engineering ideas — Self Growth Videos does not publish build instructions, and his weapon-style projects should not be replicated.

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