下一段
Primitive Technology: 2.5 m Natural draft furnace experiment 23 分钟 
E Ink Displays Have Evolved... 10 分钟 
Security Drones Debrief! (Exclusive Members Bonus Video 🎥) 11 分钟 
Building Robotic Hands | Real Life Power Armor (Part 5/6) 24 分钟 
The Age of Broken Video Games 14 分钟 
The Wild Story of the Teton Dam Failure 20 分钟 
Freud was more right than you think | The Gray Area 57 分钟 
My Life with the Walter Boys returns in 1 week!! 1 分钟 
Never wanting to unlock my phone now. My Life with the Walter Boys, Season 3 is now playing! 1 分钟 
Meet The Professional Mermaid Inspiring Adults To Play Again 8 分钟 
Primitive Technology | Building Walls with Fired Bricks and Mud Mortar 13 分钟 
Primitive Technology: Double water bellows 20 分钟 
Primitive Technology: Iron Prill Welding Experiment 27 分钟 
The Future Mark Zuckerberg Is Trying To Build 48 分钟 
What If You Just Keep Digging? 11 分钟 
Zero Gravity Is Weirder Than You Think (Bonus Episode) 12 分钟 
Primitive Technology: Grate furnace, wood fired smelting experiment 12 分钟 
Primitive Technology: Wood ash & crushed terracotta mortar 18 分钟 
Primitive Technology: Convection turbine experiments (hot air windmill) 13 分钟 
Primitive Technology: Roof tiles dried by underfloor heating 13 分钟 
Primitive Technology: Hut with Underfloor Heating (Ondol/Hypocaust) 15 分钟 
Primitive Technology: Portable pulley blower 15 分钟 
MONSTER TOWN - Ghouls, Monsters and Werewolves in a small part of London 1884 1 分钟 
Man Builds Snow Log Cabin In The Forest Of Finland | Start To Finish By @sharingsurvival 30 分钟 
Primitive Technology | Firing Tiles and Building the Roof on the Mud Mortar/Fired Brick Hut 17 分钟 
BlazBlue Entropy Effect X - Platinum Launch Trailer | PS5 Games 2 分钟 
STALKER 2: Heart of Chornobyl - Official Update 2.0: Back to the Zone Overview Trailer 4 分钟 
BEAST OF REINCARNATION Full 4K Prologue + First Boss Fight | New Action RPG Souls like SEKIRO & NIER 68 分钟 
Primitive Technology: Mud mortar experiment and firing roof tiles 25 分钟 
Primitive Technology | Flat vs Curved Tiles, A Tough Lesson 14 分钟 
Play Ball Safely! | Good Habits & Safety Song for Preschoolers | BabyBus 34 分钟 
I Sent Food To Space, Then Delivered It 16 分钟 
Our first v-long… Out exploring! #thatlittlepuff #puffatzoo 1 分钟 
Data for the Real World 2 分钟 
Egypt Just Started Building a Second Nile 55 分钟 
Why Groceries Are SO Expensive Now 27 分钟 
GPT-6 Astra Is Finally Here (And It’s REALLY Good) 20 分钟 
Our projects create A LOT of damage #Aiper #AiperIrriSense2 #SummerWithAiper #PrimeDay #2026PrimeDay 2 分钟 
How to Start a Faceless YouTube Channel in 2026! 18 分钟 
Virtual Machines EXPLAINED (This Is the Magic) 2 分钟 
Making BULLET PROOF Power Armor | Real Life Power Armor (Part 6/?) 32 分钟 
The Marathon Collector’s Edition launches March 5 1 分钟 
4K Cairo Egypt Walking Tour | What Tourists Don’t See on Egypt's Busiest Streets and HIDDEN Markets 93 分钟 
I got inside FIFA’s Secret World Cup Broadcast Network 32 分钟 
BMW M2 CS is now PERFECT! // REVIEW on AUTOBAHN 14 分钟 
This Microrobot Wiggles In Your Body 1 分钟 
How do you reconstruct an old story? 1 分钟 
Name That Infrastructure (Ep. 5) #shorts 1 分钟 
The Cartels Running Up Transatlantic Airfares 22 分钟 
Prohibition - OverSimplified 34 分钟 
Dark Secrets Hidden in America’s Most Isolated Islands (nobody comes here) 39 分钟 2.5 m Natural draft furnace experiment Subscribe: http://bit.ly/subPT | Never miss a video! Enable ‘ALL’ Notifications! Watch my newest content: https://youtube.com/playlist?list=PLGnWLXjIDnpBR4xqf3FO-xFFwE-ucq4Fj&playnext=1&index=2 Follow Primitive Technology: Wordpress: https://primitivetechnology.wordpress.com/ Patreon: https://patreon.com/user?u=2945881 Watch More Primitive Technology: Newest Uploads: https://youtube.com/playlist?list=PLGnWLXjIDnpBR4xqf3FO-xFFwE-ucq4Fj&playnext=1&index=2 Pyrotechnology: https://youtube.com/playlist?list=PLGnWLXjIDnpBVRqu5lz5JGaQxjPs7q3CJ&playnext=1&index=2 Shelter: https://youtube.com/playlist?list=PLGnWLXjIDnpBBsdKZb-vy30o88SIxItp2&playnext=1&index=2 Weapons: https://youtube.com/playlist?list=PLGnWLXjIDnpA-XGDrrmVgBnSXx15i2Awp&playnext=1&index=2 Popular Videos: https://youtube.com/playlist?list=PLGnWLXjIDnpAb29Lrdki5BPjTpMon8zla&playnext=1&index=2 About This Video: I built a 2.5 m tall furnace to see if it could get hot enough to smelt iron by natural draft alone. Such furnaces work by the stack effect where the tall furnace causes negative pressure inducing an air flow from the base of the furnace and out the top. I'd previously built 2 natural draft furnaces 1.5 m tall with one producing a small amount of iron (4 grams) from ore. The new furnace was built 25 cm in diameter and 50 cm tall with a chimney on top extending another 1.5 m. A charging door allowed charcoal and ore to be charged through the side without blocking the chimney. The furnace was hot enough to produce slag but no iron was recovered from the smelt. This was probably due to an oxidising atmosphere in the furnace, due to the short fuel bed and large charcoal lump size. An interesting side effect of the test was a strange pulsing combustion when the door was left open. Flames and smoke would blow out and be sucked back in the charging door rhythmically so it sounded like a locomotive. This phenomenon has been observed in wood stoves, I don't think it's exactly like combustion in a pulse jet as it relies on natural draft to get started but is similar. Air is sucked in, the gases combust blowing air out the door and chimney, the gases in the furnace become over expanded causing a vacuum and air is sucked back in with the cycle repeating. In future it may be necessary to mix carbon with the ore to form pellets to get it to convert to iron. I'd made a furnace like this bottle shaped design back in 2012 but with a grate rather than using tuyeres and it successfully made some nuggets of iron from an ore brick of ore and crushed charcoal set directly on the grate. 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 #1 #2
Packages published by the creator behind this video.
This creator has not set their rates yet. Send a request and we will pass it on — the price is agreed before anything is charged.
A recurring seat in my content. Subscribers enter a queue — or a random draw when there are more subscribers than slots — and appear in the video itself, in the credits, or in the description.
per month
Price on request
A guaranteed appearance of at least 10 seconds in my next video. Price depends on where in the runtime the insert lands.
Price on request
A guaranteed appearance of at least 10 seconds inside a Short cut from one of my existing videos.
one-off
Price on request