I invented the Bow Blower, a combination of the bow drill and forge blower to make a device that can force air into a fire while being easy to construct from commonly occurring natural materials using only primitive technology. I began by fanning a fire with a piece of bark to increase its temperature. It is this basic principle I improved on throughout the project. Next, I made a rotary fan from two pieces of bark that slot together at right angles to each other to form a simple 4 bladed paddle wheel about 20 cm in diameter and 5 cm tall. The blades of the fan were not angled and were designed only to throw air outwards away from the axle when spun. The rotor of the fan was made by splitting a stick two ways so it formed 4 prongs. The fan was then inserted into the prongs and the end lashed to hold it in place. Spinning the fan rotor back and forth between the palms of the hands fanned the fire. But only some of the wind generated by the fan reached the fire. The rest of it was blowing in other directions, effectively being wasted. So I built a fan housing from unfired clay to direct the air flow into the fire. This was basically an upturned pot with a hole in the top, a spout coming out of the side. The housing was about 25 cm wide and 8 cm tall. The hole in the top and the spout were both about 6 cm in diameter so that the air coming in roughly equalled the air coming out. The base of the fan rotor sat in a wooden socket placed in the ground to make it spin easier and the top of the rotor protruded from the hole in the top of the housing. Now when the fan spun, air entered the hole in the top of the housing and exited the spout in the side. Importantly, it doesn’t matter which way the fan spins, air always goes into the inlet and out the spout. Air is thrown out towards the walls of the housing and can only leave through the spout while the vacuum in the centre sucks new air into the housing through the inlet. A separate clay pipe called a tuyere was made to fit over the spout to direct air into the coals. This was done because the pipe that touches the fire can melt away so it’s better to make this part replaceable. Instead of making a large wheel and belt assembly to step up the speed of rotation, I opted for a 75 cm long bow. I made a frame to hold the rotor in place consisting of two stakes hammered into the ground with a socketed cross bar lashed on to hold the top of the rotor. I made bark fibre cordage and tied the end to a stick. I then looped the cord around the rotor and held the other end in the same hand holding the stick. I then pushed and pulled the bow causing the rotor to spin rapidly, forcing air into the fire. I made a simple mud furnace for the blower. Then I collected orange iron bacteria from the creek (iron oxide), mixed it with charcoal powder (carbon to reduce oxide to metal) and wood ash (flux to lower the melting point) and formed it into a cylindrical brick. I filled the furnace with charcoal, put the ore brick in and commenced firing. The ore brick melted and produced slag with tiny, 1mm sized specs of iron through it. My intent was not so much to make iron but to show that the furnace can reach a fairly high temperature using this blower. A taller furnace called a bloomery was generally used in ancient times to produce usable quantities of iron and consumed more charcoal, ore and labour. This device produces a blast of air with each stroke of the bow regardless of whether it is pushed or pulled. The bow makes it possible to operate the blower without using a complicated belt and wheel assembly used in traditional forge blowers. There is a brief pause at the end of each stroke where the fan stops to rotate in the other direction, but this is effectively no different to the intermittent blast of a double acting bellows of Europe or box bellows of Asia. The materials used (wood, bark, bark fibre and clay) are readily available on most continents. No leather, valves or precisely fitted piston gaskets are required as with other types of bellows. The cords for this device wear out often so a number of back up cords should be kept handy for quick replacement. In summary, this is an easy to make device that solves the problem of supplying forced combustion air required for high temperature furnaces and forges. Wordpress: https://primitivetechnology.wordpress.com/ Patreon page: https://www.patreon.com/user?u=2945881&ty=h I have no face book page. Beware of fake pages.
Views: 41764636 Primitive Technology
If anyone is interested in a good new upcoming Aussie band then this is the band for you!! Lights Of Berlin http://www.youtube.com/user/LightsOfBerlin http://www.youtube.com/watch?v=z6MHfb-WTnU http://www.youtube.com/watch?v=EQnuPGVTGMk http://www.youtube.com/watch?v=jfeHW5Z0Kng
Views: 638209 Jarrett658
Aboriginal shell midden at the south side of Barrack Point, Australia. Not much of the midden at this site remains due to coastal erosion. However some stone tools can still be found along the point before the rock plateau. We will look at some of the stone tools that remain including a fire stone or small anvil, cobble choppers, mullers and more examples of stones broken down the middle for possible use in removing mollusc's. *Apologies for the bad audio I would like to acknowledge the traditional Dharawal owners of this area and pay my full respects to it's people. No disrespect was intended via the making of this video.
Views: 219 Stone Tools
Northern Project Contracting asked Anvil Media to produce a corporate profile video for display initially at the World Indigenous Business Forum in Namibia. Read the full story here: http://www.anvilmedia.com.au/category/articles/
Views: 352 Anvil Media Pty Ltd
22/01/2019 Paid Queensland education to employment program seeks to empower Indigenous students with skills and experience for their local communities.
Views: 31 Qldaah
Amazing New Cork Music is about to take over the world! Cork has one of the very best music scenes on the planet, forget about L.A., London or New York. I mean it man! Papertrail https://youtu.be/uauCenNiQlI Milky Teeth https://youtu.be/5cbqsERH0vk Brain Deady https://youtu.be/QJrGOR86mM8 Hugh Dillon https://youtu.be/HkhEUGt6nmQ O Emperor https://youtu.be/Y4nDVpPP5JQ Ariel Posen https://youtu.be/nLGgLUTg65o Subscribe: https://goo.gl/4ZCoH4 My Kit profile: https://kit.com/sonnygreenwich #nowsthetime #nosmallcreator #cork ••• Buy ••• Canon EOS M3 Camera http://amzn.to/2wzRq05 Canon EF-M 11-22 Lens http://amzn.to/2yKfuxN Canon Lens Hood http://amzn.to/2fSYIZL Siriu Tripod http://amzn.to/2yqJWkD Rode Video Microhttp://amzn.to/2fM8IQD C Bracket http://amzn.to/2fTRZyR Camera Bag http://amzn.to/2fSX4Ye Mini Light http://amzn.to/2yJl5Vn Manfrotto Smart Clamp http://amzn.to/2Bc0VVb Guanhe Leather Case http://amzn.to/2iQenHw TOP-MAX Battery http://amzn.to/2i4zOr2 Lav Mic (price on Purple Panda has risen but I think it's worth every penny, great company) http://amzn.to/2k0QXSZ JVC SP-AD50 http://amzn.to/2i5adOV available in Currys for €20 Jabra Move Bluetooth Headphones http://amzn.to/2k19z5l Amazon Fire Tablet http://amzn.to/2i54fh5 iFixit Pro Toolkit http://amzn.to/2C2c0IE Lauten Audio LA-320 https://www.thomann.de/gb/lauten_audio_series_black_la_320.htm?partner_id=93414 EditorsKeys http://amzn.to/2tJyBZA Join TubeBuddy https://www.tubebuddy.com/SonnyGreenwichJr My upcoming album "BoulderHead Side One" Buy the single https://itunes.apple.com/ie/artist/sonny-greenwich-jr/1235331949 https://www.amazon.co.uk/gp/product/B071F3FGHV/ref=dm_ws_sp_ps_dp https://play.google.com/store/music/artist/Sonny_Greenwich_Jr?id=Aintxvxu3sck5tqnhpykdndtrhm Filmed in Kinsale, Co Cork, Ireland Follow Sonny Greenwich Jr on Twitter: https://twitter.com/sonnygreenwich Facebook: https://www.facebook.com/SonnyGreenwichJr Instagram: https://www.instagram.com/sonnygreenwich Spotify: Sonny Greenwich Jr Disclaimer: Some of the above links are affiliate links where I'll earn a small commission if you make a purchase at no additional cost to you,. All you have to do is click the link of what you'd like to buy. Thanks so much! http://www.youtube.com/c/SonnyGreenwichJr
Views: 423 Sonny Greenwich Jr
In World101x we look at the world using an anthropological lens in order to shed new perspectives on current world issues, from indigeneity to migration and material culture. In this video, we hear from UQ postdoctoral fellow in anthropology Kim de Rijke about coal seam gas mining and its affect on the people and places in the Darling Downs region of Queensland. Want to know more? Register on edX now: https://www.edx.org/course/anthropology-current-world-issues-uqx-world101x-0
This is an audio version of the Wikipedia Article: https://en.wikipedia.org/wiki/Outline_of_prehistoric_technology 00:00:52 1 Nature of prehistoric technology 00:01:54 2 Old World prehistoric technology 00:03:23 2.1 Stone Age technology in the Old World 00:04:03 2.1.1 Paleolithic technology 00:04:32 2.1.2 Lower Paleolithic technology 00:07:54 2.1.3 Middle Paleolithic technology 00:10:22 2.1.4 Upper Paleolithic Revolution 00:12:36 2.1.5 Mesolithic technology 00:13:49 2.1.6 Neolithic Revolution 00:17:23 2.2 Prehistoric Bronze Age technology in the Old World 00:18:07 2.3 Prehistoric Iron Age technology in the Old World 00:18:43 2.4 End of prehistory and the beginning of history 00:19:32 2.4.1 Transition from proto-writing to true writing 00:21:25 3 Prehistoric technology of the Americas 00:22:59 3.1 Lithic technology 00:23:43 3.2 Archaic period technology 00:24:29 3.3 Formative stage technology 00:24:59 4 Prehistoric technologies by type 00:25:11 4.1 Primitive skills 00:25:24 4.1.1 Prehistoric art 00:26:33 4.1.2 Domestication of animals 00:26:47 4.1.3 Language / numbers 00:27:05 4.1.4 Prehistoric fishing 00:27:25 4.1.5 Prehistoric hunting 00:27:44 4.1.6 Prehistoric mining 00:27:58 4.1.7 Prehistoric medicine 00:28:14 4.2 Prehistoric tools 00:28:46 4.2.1 Prehistoric clothing 00:29:05 4.2.2 Stone Age tools 00:30:54 4.2.3 Prehistoric weapons 00:31:10 5 Gallery 00:31:20 6 See also Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago. Learning by listening is a great way to: - increases imagination and understanding - improves your listening skills - improves your own spoken accent - learn while on the move - reduce eye strain Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone. Listen on Google Assistant through Extra Audio: https://assistant.google.com/services/invoke/uid/0000001a130b3f91 Other Wikipedia audio articles at: https://www.youtube.com/results?search_query=wikipedia+tts Upload your own Wikipedia articles through: https://github.com/nodef/wikipedia-tts Speaking Rate: 0.7390977948414578 Voice name: en-GB-Wavenet-C "I cannot teach anybody anything, I can only make them think." - Socrates SUMMARY ======= The following outline is provided as an overview of and topical guide to prehistoric technology. Prehistoric technology – technology that predates recorded history. History is the study of the past using written records; it is also the record itself. Anything prior to the first written accounts of history is prehistoric (meaning "before history"), including earlier technologies. About 2.5 million years before writing was developed, technology began with the earliest hominids who used stone tools, which they may have used to start fires, hunt, cut food, and bury their dead.
Views: 4 wikipedia tts