Uploaded May 2026 | Updated September 2026, 2 weeks ago
Adam builds a replica of one of the most interesting artifacts from the atomic age: the Demon Core sphere that was built by the Manhattan Project to be the fissile core of early atomic bomb testing. But it's not just the sphere that Adam is interested in--he builds his take on the strange mangesium boxes that were used to transport the plutonium cores. It's an epic build to recreate one of the most unique carrying cases to ever have been made.
3D printed demon core case (not to scale): printables.com/model/451707-plutonium-core-case
Other replica builds of the demon core box: youtube.com/watch?v=RFHQdXxLj8M
therpf.com/forums/threads/historical-prop-the-plutonium-carrying-box-for-the-fat-man-bomb.278641
A Machining Mistake While Milling Fins (member exclusive): youtu.be/Oyq0njwM2vA
@kylehill's Demon Core - The True Story: youtu.be/aFlromB6SnU
Shot by Adam Savage and edited by Josh Self
Music by Jinglepunks
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Intro bumper by Abe Dieckman
Thanks for watching!
#adamsavage #onedaybuilds #propreplica
Adam builds a replica of one of the most interesting artifacts from the atomic age: the Demon Core sphere that was built by the Manhattan Project to be the fissile core of early atomic bomb testing. But it's not just the sphere that Adam is interested in--he builds his take on the strange mangesium boxes that were used to transport the plutonium cores. It's an epic build to recreate one of the most unique carrying cases to ever have been made.
3D printed demon core case (not to scale): printables.com/model/451707-plutonium-core-case
Other replica builds of the demon core box: youtube.com/watch?v=RFHQdXxLj8M
therpf.com/forums/threads/historical-prop-the-plutonium-carrying-box-for-the-fat-man-bomb.278641
A Machining Mistake While Milling Fins (member exclusive): youtu.be/Oyq0njwM2vA
@kylehill's Demon Core - The True Story: youtu.be/aFlromB6SnU
Shot by Adam Savage and edited by Josh Self
Music by Jinglepunks
Subscribe for more videos (and click the bell for notifications): youtube.com/subscription_center?add_user=testedcom
Join this channel to support Tested and get access to perks:
youtube.com/channel/UCiDJtJKMICpb9B1qf7qjEOA/join
Tested and Adam Savage Ts, stickers, (de) merit badges and more: tested-store.com
Savage Merchandising: adamsavage.com
About Tested: tested.com/about
Meet Adam in Person: tested.com/events
TikTok: tiktok.com/@testedcom
Instagram: instagram.com/testedcom
Twitter: twitter.com/testedcom
Facebook: facebook.com/testedcom
Discord: discord.gg/tested
Amazon Storefront: amazon.com/shop/adamsavagestested
Audio Described and Accessible Videos: youtube.com/playlist?list=PLJtitKU0CAeiQLgj4PZ9onSW6YXIz5ADR
Intro bumper by Abe Dieckman
Thanks for watching!
#adamsavage #onedaybuilds #propreplica
