Primitive Technology: One Way Spinning, Rope Stick Blower
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Published 2024-02-01
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About This Video:
I made a type of forge blower that spins continuously in one direction only, driven with a simple rope and stick, using a novel technique I developed. The rope, wrapped around the rotor, is pulled down and back via the stick on the power stroke, tightening and causing the rotor to spin clockwise. The stick is then lifted up towards the rotor and pushed forward on the return stroke, loosening the ropes grip around the rotor, allowing it to continue to spin in the same direction due to its momentum. The cycle is then repeated producing uninterrupted, one way, high speed rotation.
Until now the blowers I made intermittently spun clockwise, stopped, and then turned anti clockwise driven either by a stick and rope mechanism or by a string passed over a groove in the top of the rotor (see start of video). Energy was wasted each time the rotation was halted and reversed. This also meant that only symmetrical blower housings could be used, more efficient volute shaped housings could not. But with the new operating technique producing one way rotation, a volute shaped housing was built and tested, working as intended.
The other change to the blower was that it is now mounted vertically rather than laid out horizontally. The rotor is suspended between two upright stakes that have a single hole partly bored into each of them. These hold the ends of the rotor, acting as thrust bearings. This simple frame allows the rotor to spin freely.
The new blower will be used for iron smelting and will be compared with the older blower designs. The potential advantages are better efficiency and ergonomics. Less effort seems to be expended due to the continuous momentum being conserved through each cycle. Also, one hand is left free during use which might be an advantage during forging (i.e. using tongs, adding charcoal etc.). The disadvantage is that it's less portable than the original, the wooden stakes need to be driven into soft ground meaning there's less places it can be used. But this is a negligible issue if the forging area is permanent.
Contents:
00:00 Current blower design (spins both ways)
00:35 Frame for new blower
03:33 Making rope
05:28 Making fan spokes
07:10 Setting up the mechanism
07:35 One way spinning technique
08:33 Fan blades
09:40 Test with old symmetrical housing
14:29 Making new volute shaped housing
21:57 Setting up new housing
23:52 Testing with new housing
About Primitive Technology:
Primitive technology is a hobby where you build things in the wild completely from scratch using no modern tools or materials. These are the strict rules: If you want a fire, use a fire stick - An axe, pick up a stone and shape it - A hut, build one from trees, mud, rocks etc. The challenge is seeing how far you can go without utilizing modern technology. I do not live in the wild, but enjoy building shelter, tools, and more, only utilizing natural materials. To find specific videos, visit my playlist tab for building videos focused on pyrotechnology, shelter, weapons, food & agriculture, tools & machines, and weaving & fiber.
#PrimitiveTechnology #ForgeBlower #Pyrotechnics
All Comments (21)
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The key innovation with this blower is the one-way spinning technique which I developed through trial and error. Prior to this, my blowers would spin one way, stop, and then spin the other way during each cycle. With the new method, the stick and rope are pulled down and back on the power stroke causing the rotor to spin clockwise. Then the stick and rope are lifted up and forwards, loosening the ropes grip on the rotor, allowing it to continue to spin clockwise due to momentum. Thanks to the new mode of operation, continuous, one-way rotation is produced, conserving energy by not having rotation intermittently cease during each cycle and allowing for more efficient volute shaped housings to be used to direct the air as opposed to the old symmetrical housing design which were necessary for the old technique to work. The rope and stick are easier to make than a wheel and pulley used in modern forge blowers but the rpm and continuous one-way rotation of the 2 designs seem comparable.
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Seeing a caveman operating his turbo charger for his camp fire is simultaneously the most primitive and modern thing I have ever seen.
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You know it's a good project when he uses that GOOD clay.
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This guy is the only real primitive youtuber out there, respect
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I feel like you're on the verge of making a steam engine from scratch and will eventually end one of these by driving into the sunset in your jungle car.
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Pro Tip: Enable the YouTube Subtitles, he explains every step of the process.
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I love how the spider is just chillin on the post at 12:03
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incredible! As a modern day toolmaker, I can appreciate this man's hard work starting from scratch! He is super-human!
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There's a joke about becoming an adult and having a favorite spatula. John has a favorite pipe-forming log. After appearing in so many videos, it needs a name. LOL
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12:03 Spider shows up to watch the fire. Chilling on the upright post.
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the materials make it seem simple, but this is nothing short of brilliant engineering and craftsmanship
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I love how we've gone from these designs that felt single use and improvised, to designs like this that use more advanced materials (relatively) like the more refined clay and designs that almost feel engineered and precise. It's like we are at the point of serious optimization right before a big breakthrough This is super clever for being so simple, and feels like it might be a serious game changer for future furnace designs
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Not to ignore how impressive the experiment-turned-genuine-improvement is with the blower, I can't help noticing that you've gotten much better over time at extracting, processing, and working with clay. The crafting of the new blower's more complex shape was quite skillful. Bravo!
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the 'im off to test an idea!' shot was pure cinema
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Ahhh, the only 'PRIMITIVE TECHNOLOGY "channel i like to watch since 2016, with some useful and realistic survival skill and not some random dude that only make pools(while their excavator is filming them off camera) . 😊😊
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I know one of the advantages of this is that you have a free hand, but you could have one of these sticks in each hand and alternate cycles so one is always activating the blower. I love this channel. Thanks for the years of inspiration and entertainment.
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10,000 years from now, a future civilization will discover these clay artifacts and concluded that the turbofan was invented before the wheel.
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My man built a turbocharger from clay. 😂😂
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The absolute most efficient use of human energy in moving air in the primitive world. And you built it like it was nothing simple easy to follow steps. Love your videos never stop they highlight how far humanity has come in just the last few hundred years.
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These videos make me realize how much smarter and resourceful people were when technology was TRULY primitive. It puts into perspective what it means to be "Smart" or "Intelligent".
