Sponsored by:

Forum : General Discussion

To post to this forum you must register.
Sort
Page 1 of 165: « First 1 2 3 Next > Last »

Discussion Threads

Sort Threads   Create Date / Rating Title / Poster Last Post Comments Views
04/05/2025 6:07 PM Safer, Simpler Solar Cooker/Solar Drier?
by gaiatechnician
Last post: 05/17/2025 2:58 AM
by gaiatechnician
 23 387
05/09/2025 4:12 PM AI-Controlled Fighter Jets
by HiTekRedNek
Last post: 05/16/2025 10:38 AM
by DinosaurDad
 13 257
05/09/2025 5:26 AM Memorabilia
by electronick
Last post: 05/15/2025 2:06 PM
by steve45
 9 188
04/16/2025 12:09 PM Geothermal or Fusion
by SolarEagle
Last post: 05/14/2025 9:32 PM
by SolarEagle
 54 524
04/03/2025 5:08 PM Space/Time Travel
by NSS
Last post: 05/14/2025 6:27 PM
by HiTekRedNek
 46 551
12/03/2009 1:45 AM remove myself from cr4
by elizo
Last post: 05/14/2025 2:44 PM
by sb
 6 218
05/01/2025 12:08 PM Disappearing Sock
by HiTekRedNek
Last post: 05/12/2025 7:57 AM
by HiTekRedNek
 17 260
02/17/2020 1:36 PM People Are Jailbreaking Used Teslas to Get the Features They Expect
by wrenchtwirler
Last post: 05/10/2025 5:59 AM
by phoenix911
 101 779
04/28/2025 5:38 PM A Color Never Seen Before
by Rixter
Last post: 05/02/2025 2:34 PM
by Rixter
 12 194
05/26/2024 10:19 AM Black Paint Makes White Paint Whiter
by HiTekRedNek
Last post: 04/30/2025 10:28 AM
by HiTekRedNek
 30 646
07/25/2015 10:02 AM WD 40 / Original or Specialist ?
by tonyhemet
Last post: 04/29/2025 6:03 AM
by PWSlack
 72 2523
05/06/2011 6:11 AM Surface Area of a 5D bend
by Lost in maths
Last post: 04/29/2025 4:19 AM
by PWSlack
 11 814
04/16/2025 7:57 AM Why Didn't Anyone Tell Me this About Epoxy?
by Randall
Last post: 04/28/2025 1:44 PM
by not so smart
 11 293
06/11/2010 9:24 AM How to Claim Insurance on a Sponge Iron Damaged by Rain Water
by Anonymous Poster
Last post: 04/28/2025 6:18 AM
by PWSlack
 19 628
02/26/2009 11:39 PM UN Scientists: Climate Change Evidence is Unequivocal
by Bayes
Last post: 04/26/2025 8:31 AM
by sceptic
 184 941
10/14/2021 6:42 PM Zero Carbon Energy Production
by Lehman57
Last post: 04/26/2025 7:52 AM
by Codemaster
 67 620
06/22/2023 9:33 AM Tesla extends reign at top of American-Made Index
by Trees4Life
Last post: 04/24/2025 11:40 AM
by phoenix911
 3 119
09/15/2008 3:06 PM Whole House Water Filter
by ProcessEngr
Last post: 04/23/2025 7:15 AM
by PWSlack
 11 250
04/05/2025 9:59 AM What is the Name of this Math Operation?
by HiTekRedNek
Last post: 04/19/2025 7:42 AM
by Jorrie
 27 399
04/22/2009 1:59 AM Energy in Matchstick
by kvsubramanyam
Last post: 04/16/2025 6:31 AM
by PWSlack
 16 1049
04/14/2025 11:24 AM Accountants Sank the Titanic
by HiTekRedNek
Last post: 04/15/2025 11:26 AM
by Doorman
 18 226
04/10/2025 8:04 AM Toroidal Propellers on Wind Turbines?
by HiTekRedNek
Last post: 04/14/2025 1:01 PM
by Rixter
 14 351
03/01/2025 12:38 PM Geothermal Could Become Cost Competitive With This Technology
by SolarEagle
Last post: 04/13/2025 6:17 PM
by SolarEagle
 24 366
04/05/2025 9:13 AM Effect of Ice on an Explosion
by HiTekRedNek
Last post: 04/12/2025 10:53 PM
by SolarEagle
 5 148
03/07/2021 9:33 AM How Stupid is this Respect My COVID Space Idea?
by Randall
Last post: 04/12/2025 7:31 AM
by HiTekRedNek
 164 842
04/01/2010 8:55 AM mth
by Anonymous Poster
Last post: 04/11/2025 7:51 AM
by PWSlack
 7 659
11/19/2019 3:32 PM Tiny Positive Displacement Pump
by GerWat
Last post: 04/10/2025 2:51 PM
by GerWat
 17 318
02/17/2008 6:47 PM Salty Vs. Fresh Water
by aussiviking
Last post: 04/08/2025 10:28 AM
by PWSlack
 15 477
04/03/2025 7:20 AM Travel Router
by BruceFlorida
Last post: 04/03/2025 10:56 PM
by phoenix911
 3 133
03/21/2025 8:29 AM Heathrow Airport Power Failure Disaster
by HiTekRedNek
Last post: 04/02/2025 11:39 AM
by PWSlack
 15 258
03/31/2025 5:52 AM A New Kid on the Block to Take on the Tech Giants
by phoenix911
Last post: 03/31/2025 12:14 PM
by phoenix911
 3 129
11/04/2017 9:04 AM Material for Pipe Milk Dairy - Milk Transferring to Silo/Packing Machine
by dhayanandhan
Last post: 03/30/2025 9:13 PM
by phoenix911
 23 337
03/26/2012 2:55 PM Is It Safe to Drink Water Boiled In a Microwave?
by mazhur
Last post: 03/29/2025 1:35 PM
by phoenix911
 268 2146
03/17/2025 10:22 AM Mysterious: Magic Circle
by HiTekRedNek
Last post: 03/26/2025 9:39 AM
by HiTekRedNek
 9 231
01/28/2009 5:09 PM GMT and International Date Line
by Hendrik
Last post: 03/24/2025 6:39 AM
by PWSlack
 56 504
02/22/2025 2:40 AM Problem
by Stef
Last post: 03/18/2025 8:22 AM
by The Wizard
 9 153
03/11/2025 9:41 AM Win 10 Hard Drive Blocked by Bitlocker
by HiTekRedNek
Last post: 03/17/2025 11:35 AM
by Kris
 13 214
11/18/2024 8:40 AM Using Mount Kilimanjaro to Launch Rockets: Chat with GPT
by Randall
Last post: 03/17/2025 8:33 AM
by Randall
 12 318
03/08/2025 8:32 AM Help for Rosacea
by HiTekRedNek
Last post: 03/09/2025 9:01 PM
by HiTekRedNek
 6 150
03/01/2025 9:58 PM Engine Crane Weight
by schueydoo
Last post: 03/07/2025 8:22 AM
by steve45
 17 246
11/15/2017 2:51 PM MIL SPEC for Cable Labeling
by BruceFlorida
Last post: 03/05/2025 5:54 AM
by phoenix911
 13 711
02/09/2025 11:35 AM California Fires
by HiTekRedNek
Last post: 03/04/2025 12:06 PM
by phoenix911
 41 370
02/25/2025 9:55 AM Best Way to Lock a Screw
by HiTekRedNek
Last post: 03/03/2025 3:52 PM
by Brave Sir Robin
 11 260
05/09/2011 9:51 AM Two Submersible Pumps in One Well Bore
by Garthh
Last post: 03/02/2025 6:35 AM
by Kris
 51 2631
05/30/2024 8:48 PM Reverse Ground Clamp for Ladder Tray
by EV1guy2004
Last post: 02/25/2025 9:41 AM
by HiTekRedNek
 6 276
02/19/2025 12:28 PM Memory of Previous Contacts Affects Static Electricity
by Rixter
Last post: 02/25/2025 8:32 AM
by phoenix911
 20 176
02/19/2025 4:14 AM Non-Metallic Arbour Press
by Nigh
Last post: 02/24/2025 4:29 AM
by Nigh
 18 198
10/30/2013 7:11 AM Diesel Generator - Noise levels
by SJM
Last post: 02/21/2025 5:28 AM
by PWSlack
 11 223
02/02/2025 3:21 PM Aircraft Collision
by SolarEagle
Last post: 02/14/2025 9:32 PM
by SolarEagle
 32 408
12/08/2023 8:23 AM Christmas Present Ideas for Technical People
by BruceFlorida
Last post: 02/13/2025 1:05 AM
by Ushuaya
 27 472
02/08/2025 10:55 AM Ultrasonic Waves Resonance
by yesyen
Last post: 02/12/2025 6:06 PM
by Brave Sir Robin
 28 257
02/07/2025 10:39 AM Flat Mains Cable for Door and Window Jambs, etc.
by Randall
Last post: 02/12/2025 7:59 AM
by Randall
 20 195
02/07/2025 11:28 AM Spark Guidance
by HiTekRedNek
Last post: 02/10/2025 7:34 AM
by gideon
 3 107
01/06/2025 5:32 AM Hydrogen, a Feasible Source of Energy?
by electronick
Last post: 02/07/2025 6:13 AM
by The Wizard
 29 386
02/28/2014 10:25 PM A Modern PID Controller for an Old Electric House Furnace
by Gavilan
Last post: 02/06/2025 7:19 AM
by PWSlack
 17 457
02/03/2025 7:33 AM How Birds Fly Over the Himalayas
by HiTekRedNek
Last post: 02/05/2025 9:01 PM
by SolarEagle
 5 165
02/22/2013 1:09 AM Circles in Principal Circle
by Anonymous Poster
Last post: 02/05/2025 10:03 AM
by phoenix911
 14 472
12/30/2014 9:16 AM Carpentry and Mathematics
by Codemaster
Last post: 02/04/2025 2:59 PM
by phoenix911
 36 781
09/03/2009 12:07 AM About my visit to CR4 and colloquialisms
by CraziestOzzy
Last post: 02/04/2025 8:03 AM
by PWSlack
 11 131
01/13/2025 11:57 AM Anyone Know What the Full Implication of the Sentence in Bold Means?
by Trees4Life
Last post: 02/03/2025 4:56 PM
by phoenix911
 46 540
01/20/2025 6:47 AM Steel versus Aluminium
by electronick
Last post: 02/03/2025 5:49 AM
by electronick
 28 292
01/27/2025 1:01 PM DeepSeek
by SolarEagle
Last post: 02/02/2025 11:13 PM
by SolarEagle
 15 204
01/24/2025 10:22 PM Binary Bio-Weapons
by Gavilan
Last post: 01/30/2025 9:39 PM
by Gavilan
 6 209
01/28/2025 7:37 AM VFD on Heat Pump Compressor
by HiTekRedNek
Last post: 01/30/2025 9:34 PM
by Gavilan
 19 143
01/27/2025 6:20 AM Archimedes Principle at Work Here
by HiTekRedNek
Last post: 01/28/2025 11:56 AM
by Codemaster
 8 192
11/09/2020 7:44 AM Pfizer, BioNTech say Covid Vaccine is More Than 90% Effective
by SolarEagle
Last post: 01/28/2025 8:01 AM
by phoenix911
 26 268
03/20/2009 9:57 AM Will a 50-Hz Washing Machine Work at 60-Hz?
by gbequizo
Last post: 01/27/2025 11:16 AM
by The Wizard
 21 3142
11/07/2014 2:25 PM Move Over Solyndra
by Fredski
Last post: 01/24/2025 8:56 PM
by phoenix911
 10 328
11/21/2024 6:56 AM Electrostatic Precipitation of Water Vapor from Clouds
by HiTekRedNek
Last post: 01/24/2025 11:40 AM
by Haymaker
 26 377
01/11/2025 2:37 PM Making Washboard Roads
by deanpavil
Last post: 01/22/2025 12:53 PM
by jmueller
 15 329
12/18/2024 5:11 AM Lead Poisoning
by HiTekRedNek
Last post: 01/16/2025 9:24 AM
by HiTekRedNek
 16 373
02/09/2011 7:25 AM Simplicity In Engineering
by penttijp
Last post: 01/16/2025 7:22 AM
by PWSlack
 8 187
02/08/2011 2:42 PM GE Range Issue
by purdygurl
Last post: 01/16/2025 7:20 AM
by PWSlack
 20 209
02/07/2011 9:33 AM Descaling a Water Heater
by Waidesworld
Last post: 01/16/2025 7:05 AM
by PWSlack
 34 2730
12/12/2014 10:00 AM Global Electric Capacity Crisis - Really!
by James Stewart
Last post: 01/13/2025 11:43 AM
by phoenix911
 91 494
01/06/2025 7:35 AM Genes Changed by Microwaves
by HiTekRedNek
Last post: 01/11/2025 8:38 PM
by BruceFlorida
 22 319
12/31/2024 8:50 AM Converting Sand into "Concrete"
by HiTekRedNek
Last post: 01/10/2025 10:07 AM
by piolenc
 11 268
10/05/2009 1:57 PM What are Your Favorite Sayings about Work & Life?
by Transcendian
Last post: 01/09/2025 8:59 AM
by phoenix911
 399 2182
12/30/2024 7:03 AM Breaking the Ice
by HiTekRedNek
Last post: 01/08/2025 2:12 PM
by steve45
 10 206
12/14/2024 9:03 AM Interview: Transforming Motion with Electrostatic Motors
by Trees4Life
Last post: 01/06/2025 7:42 AM
by PWSlack
 16 213
05/16/2010 10:02 PM Boiler Harmonics
by whezmabeer
Last post: 01/05/2025 5:35 AM
by PWSlack
 12 558
12/23/2024 8:49 PM What are These Utility Street Markings?
by BruceFlorida
Last post: 01/03/2025 10:51 PM
by steve45
 9 367
12/28/2024 4:58 PM The Importance of Glass
by SolarEagle
Last post: 12/29/2024 10:55 PM
by dkwarner
 6 210
12/27/2024 11:36 PM This is Basically a Plastiguage only Pb Wire. Pretty Cool!
by Deefburger
Last post: 12/29/2024 7:41 AM
by BruceFlorida
 2 80
12/13/2024 9:32 AM Triangular Antennae
by HiTekRedNek
Last post: 12/28/2024 11:31 AM
by Rixter
 13 212
12/17/2024 5:08 AM Rogue Waves
by HiTekRedNek
Last post: 12/19/2024 2:34 PM
by Rixter
 8 276
12/12/2024 6:38 AM Unidentified Drones
by HiTekRedNek
Last post: 12/17/2024 6:16 PM
by Hooker
 46 322
12/13/2024 6:52 AM Kitchen Cabinet Door Hinge Has A Loose Screw
by BruceFlorida
Last post: 12/16/2024 7:35 AM
by Randall
 29 185
12/19/2011 9:04 PM "Earth" Temperature Just Below Frost Line
by Anonymous Poster
Last post: 12/16/2024 7:34 AM
by PWSlack
 50 1493
12/12/2024 7:05 AM German Silver
by HiTekRedNek
Last post: 12/14/2024 2:02 AM
by HiTekRedNek
 14 134
12/11/2024 7:42 AM Unlock Bitlocker
by HiTekRedNek
Last post: 12/12/2024 8:09 AM
by steve45
 4 143
08/08/2015 9:39 PM Your Tax Dollars At Work Causing Disasters
by lyn
Last post: 12/10/2024 10:21 AM
by Codemaster
 8 522
04/29/2015 2:57 PM What Is it? (Sorry, Again I Haven't a Clue.)
by Randall
Last post: 12/10/2024 7:15 AM
by PWSlack
 55 1503
07/31/2023 2:39 PM Vogtle Unit 3 Goes On Line
by lyn
Last post: 12/08/2024 10:25 AM
by Anonymous Poster
 14 285
11/15/2024 6:29 AM URANUS Flatulence: Is There a Comedian in the Audience?
by HiTekRedNek
Last post: 12/06/2024 10:57 AM
by HiTekRedNek
 8 193
11/18/2024 11:22 AM ABS Sensitivity?
by NSS
Last post: 12/06/2024 10:42 AM
by HiTekRedNek
 24 252
12/02/2022 5:51 PM Fire Extinguisher vs. Electronics??
by Sid_Sidow
Last post: 12/06/2024 6:28 AM
by The Wizard
 16 513
06/20/2019 6:39 AM Using the Wrong Tool for the Job
by Randall
Last post: 12/05/2024 1:03 PM
by HiTekRedNek
 153 1588
11/17/2024 4:59 AM Model for a Pulse Detonation Turbo Driven Axle Engine
by SolarEagle
Last post: 11/29/2024 6:47 PM
by Deefburger
 13 229
11/22/2024 10:16 AM First Mechanical Qubit
by Rixter
Last post: 11/25/2024 7:14 AM
by Rixter
 2 245
Page 1 of 165: « First 1 2 3 Next > Last »
To post to this forum you must register.

Display Options
Showing threads 1 to 100 of 16470
Sorted By Sorted By Sort Order Sort Order
From The From The
Post Type Post Type
Tags (comma-delimited) (comma-delimited)
Show Threads

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
General Discussion:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (54 right now)
Show Members
Advertisement