# \#Engineering **URL:** https://teo9i.com/tag/engineering/98.md [Latest](https://teo9i.com/latest.md) · [Categories](https://teo9i.com/categories.md) · [Tags](https://teo9i.com/tags.md) --- ## [An "Impossible" Double-Helix Mechanism](https://teo9i.com/t/an-impossible-double-helix-mechanism/8512)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 1\ **Last updated:** [August 15, 2026, 12:48pm UTC](https://teo9i.com/t/an-impossible-double-helix-mechanism/8512 "2026-08-15T12:48:22Z")
--- ## [Restoring an FV4005 Tank with the Biggest Tank Gun in History](https://teo9i.com/t/restoring-an-fv4005-tank-with-the-biggest-tank-gun-in-history/8470)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [July 15, 2026, 2:18pm UTC](https://teo9i.com/t/restoring-an-fv4005-tank-with-the-biggest-tank-gun-in-history/8470 "2026-07-15T14:18:30Z")
--- ## [The Oldest Power Hammer in the World](https://teo9i.com/t/the-oldest-power-hammer-in-the-world/8453)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [July 5, 2026, 12:00am UTC](https://teo9i.com/t/the-oldest-power-hammer-in-the-world/8453 "2026-07-05T00:00:58Z")
--- ## [The 100,000 Horsepower Engine](https://teo9i.com/t/the-100-000-horsepower-engine/8413)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [June 15, 2026, 8:10pm UTC](https://teo9i.com/t/the-100-000-horsepower-engine/8413 "2026-06-15T20:10:40Z")
--- ## [Building a Micro-Drilling Machine](https://teo9i.com/t/building-a-micro-drilling-machine/8366)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 1\ **Last updated:** [May 13, 2026, 6:35am UTC](https://teo9i.com/t/building-a-micro-drilling-machine/8366 "2026-05-13T06:35:39Z")
--- ## [China's Radio Telescope Behemoth](https://teo9i.com/t/chinas-radio-telescope-behemoth/8323)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [April 20, 2026, 9:19am UTC](https://teo9i.com/t/chinas-radio-telescope-behemoth/8323 "2026-04-20T09:19:21Z")
--- ## [Why This Genius Race Car Was Banned](https://teo9i.com/t/why-this-genius-race-car-was-banned/8281)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [March 25, 2026, 2:17pm UTC](https://teo9i.com/t/why-this-genius-race-car-was-banned/8281 "2026-03-25T14:17:54Z")
--- ## [The (illegal) Nuclear Reactor Buried Under Greenland](https://teo9i.com/t/the-illegal-nuclear-reactor-buried-under-greenland/8276)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [March 21, 2026, 3:34pm UTC](https://teo9i.com/t/the-illegal-nuclear-reactor-buried-under-greenland/8276 "2026-03-21T15:34:51Z")
--- ## [Inside the Schwerer Gustav](https://teo9i.com/t/inside-the-schwerer-gustav/8269)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 3\ **Last updated:** [March 15, 2026, 6:36pm UTC](https://teo9i.com/t/inside-the-schwerer-gustav/8269 "2026-03-15T18:36:13Z")
--- ## [Precision Metal Puzzles](https://teo9i.com/t/precision-metal-puzzles/8242)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [February 28, 2026, 4:17pm UTC](https://teo9i.com/t/precision-metal-puzzles/8242 "2026-02-28T16:17:17Z")
--- ## [US particle accelerators turn nuclear waste into electricity](https://teo9i.com/t/us-particle-accelerators-turn-nuclear-waste-into-electricity/8235)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 1\ **Last updated:** [February 25, 2026, 9:28pm UTC](https://teo9i.com/t/us-particle-accelerators-turn-nuclear-waste-into-electricity/8235 "2026-02-25T21:28:01Z")
US particle accelerators turn nuclear waste into electricity, cut radioactive life by 99.7% The system uses a particle accelerator to fire high-energy protons at a target, such as liquid mercury, to trigger spallation. … --- ## [Cast-Iron Radiator Gaming PC](https://teo9i.com/t/cast-iron-radiator-gaming-pc/8232)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [February 23, 2026, 5:48pm UTC](https://teo9i.com/t/cast-iron-radiator-gaming-pc/8232 "2026-02-23T17:48:12Z")
--- ## [This New Pyramid Theory Explains the Missing Evidence](https://teo9i.com/t/this-new-pyramid-theory-explains-the-missing-evidence/8197)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [February 6, 2026, 2:22pm UTC](https://teo9i.com/t/this-new-pyramid-theory-explains-the-missing-evidence/8197 "2026-02-06T14:22:17Z")
--- ## [Inside US B2 Spirit Nuclear Launch Process](https://teo9i.com/t/inside-us-b2-spirit-nuclear-launch-process/8119)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [December 19, 2025, 4:50pm UTC](https://teo9i.com/t/inside-us-b2-spirit-nuclear-launch-process/8119 "2025-12-19T16:50:31Z")
--- ## [Crafting a KTM Aluminum Tank | Part. 1](https://teo9i.com/t/crafting-a-ktm-aluminum-tank-part-1/8059)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 2\ **Last updated:** [December 1, 2025, 5:06pm UTC](https://teo9i.com/t/crafting-a-ktm-aluminum-tank-part-1/8059 "2025-12-01T17:06:14Z")
--- ## [Building the Impossible Lightsaber](https://teo9i.com/t/building-the-impossible-lightsaber/8057)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [November 2, 2025, 3:38am UTC](https://teo9i.com/t/building-the-impossible-lightsaber/8057 "2025-11-02T03:38:40Z")
--- ## [Metallization](https://teo9i.com/t/metallization/8036)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [October 27, 2025, 9:25am UTC](https://teo9i.com/t/metallization/8036 "2025-10-27T09:25:05Z")
--- ## [Why Simple Everyday Objects Are Impossible to Make](https://teo9i.com/t/why-simple-everyday-objects-are-impossible-to-make/8009)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [October 11, 2025, 9:04pm UTC](https://teo9i.com/t/why-simple-everyday-objects-are-impossible-to-make/8009 "2025-10-11T21:04:24Z")
--- ## [Why You Can’t Use Glass in Airburst Bombs](https://teo9i.com/t/why-you-can-t-use-glass-in-airburst-bombs/7986)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [October 3, 2025, 4:26pm UTC](https://teo9i.com/t/why-you-can-t-use-glass-in-airburst-bombs/7986 "2025-10-03T16:26:27Z")
--- ## [3D-printed Mechanical Book that Comes Alive](https://teo9i.com/t/3d-printed-mechanical-book-that-comes-alive/7966)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [September 24, 2025, 7:07pm UTC](https://teo9i.com/t/3d-printed-mechanical-book-that-comes-alive/7966 "2025-09-24T19:07:54Z")
--- ## [The quest for the perfect egg crack](https://teo9i.com/t/the-quest-for-the-perfect-egg-crack/7905)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [August 30, 2025, 5:36pm UTC](https://teo9i.com/t/the-quest-for-the-perfect-egg-crack/7905 "2025-08-30T17:36:21Z")
--- ## [I Invented an Adjustable Ratcheting Wrench](https://teo9i.com/t/i-invented-an-adjustable-ratcheting-wrench/7900)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [August 27, 2025, 5:44am UTC](https://teo9i.com/t/i-invented-an-adjustable-ratcheting-wrench/7900 "2025-08-27T05:44:27Z")
--- ## [Inventing the Adjustable Allen Key](https://teo9i.com/t/inventing-the-adjustable-allen-key/7856)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [August 16, 2025, 2:23pm UTC](https://teo9i.com/t/inventing-the-adjustable-allen-key/7856 "2025-08-16T14:23:20Z")
--- ## [Inside a $300 autoinjector](https://teo9i.com/t/inside-a-300-autoinjector/7812)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 2\ **Last updated:** [August 1, 2025, 12:26pm UTC](https://teo9i.com/t/inside-a-300-autoinjector/7812 "2025-08-01T12:26:12Z")
Mirror --- ## [Are Space Elevators Still a Thing for the Future?](https://teo9i.com/t/are-space-elevators-still-a-thing-for-the-future/7532)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [March 31, 2025, 10:19pm UTC](https://teo9i.com/t/are-space-elevators-still-a-thing-for-the-future/7532 "2025-03-31T22:19:33Z")
--- ## [Attempting to Make the World's Smallest\* Electric Motor](https://teo9i.com/t/attempting-to-make-the-worlds-smallest-electric-motor/7405)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [January 27, 2025, 10:11am UTC](https://teo9i.com/t/attempting-to-make-the-worlds-smallest-electric-motor/7405 "2025-01-27T10:11:32Z")
--- ## [If it Looks Right, It Will Fly Right - Right?](https://teo9i.com/t/if-it-looks-right-it-will-fly-right-right/7321)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [November 26, 2024, 8:37am UTC](https://teo9i.com/t/if-it-looks-right-it-will-fly-right-right/7321 "2024-11-26T08:37:11Z")
--- ## [3D Concrete Printing in 1930 by William E. Urschel](https://teo9i.com/t/3d-concrete-printing-in-1930-by-william-e-urschel/7308)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [November 18, 2024, 11:24pm UTC](https://teo9i.com/t/3d-concrete-printing-in-1930-by-william-e-urschel/7308 "2024-11-18T23:24:50Z")
--- ## [The 49x49x49 Rubik's Cube](https://teo9i.com/t/the-49x49x49-rubiks-cube/7286)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [November 11, 2024, 12:16am UTC](https://teo9i.com/t/the-49x49x49-rubiks-cube/7286 "2024-11-11T00:16:39Z")
--- ## [Tidal Power: Unlocking the Greatest Untapped Energy Resource](https://teo9i.com/t/tidal-power-unlocking-the-greatest-untapped-energy-resource/7222)
**Author:** [@REALITY](https://teo9i.com/u/REALITY)\ **Replies:** 0\ **Last updated:** [October 21, 2024, 2:04pm UTC](https://teo9i.com/t/tidal-power-unlocking-the-greatest-untapped-energy-resource/7222 "2024-10-21T14:04:49Z")
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