Sponsored by:


Section Forums
Section Blogs
See all Forum Threads

Section Forums

General Discussion

15855 threads, 300244 comments (6 Viewing)

LOW CONSUMPTION electric motor and DC generator

11/18/2018 by sciencetoolbar
Low consumption motor & DC generator. Objective : to build an electric motor operated under low power (voltage and current) , powered by a sing...
Views: 27, Comments: 15
Last comment 11/18/2018 by sciencetoolbar

Where to Buy a Coupling

11/17/2018 by kadeberg
I need Information " where Buy Coupling NOUVO PIGNONE" COUPLING,FLEX:NUOVOPIG K601-2 TURBINE FLEXIBLE COUPLING PART NO. : RT054998 Thank you
Views: 32, Comments: 4
Last comment 11/17/2018 by spades

Kilogram, Ampere, Kelvin and Mole Redefined International System of Units Overhauled in Historic Vote

11/16/2018 by Rixter
It's been agreed to base all units on physical constants. The standard kilogram mass currently stored in Paris will no longer be needed. "The new def...
Views: 197, Comments: 12
Last comment 11/18/2018 by Dennis R. Levesque

POD Changed to USPS in 1971

11/16/2018 by HiTekRedNek
The USPS gets a lot of bad press,but there were,and still are some amazing employees at the USPS. In 1988 they had a machine called the LSM(Letter So...
Views: 115, Comments: 17
Last comment 11/18/2018 by HiTekRedNek
Go to this Forum

Commercial Space

2020 threads, 3913 comments (1 Viewing)

We Are Direct Providers of Loans, Project Financing, Lease Bank Guarantee and Genuine SBLC Providers

11/17/2018 by CANDMFINANCE
Our financing solution offers flexible loans to facilitate purchasing of equipment for businesses. Available to companies with annual turnover of up...
Views: 8, Comments: 0

Do You Know Why Tensile Strength is Important?

10/29/2018 by Victor Raynor
Other than meeting the standards, what do you think the importance of tensile testing?
Views: 81, Comments: 1
Last comment 10/29/2018 by Tornado

Amazing and Unique Exterior Designs Ideas

10/20/2018 by yantramstudio
These are inventive and one of a kind current idea of a chapel plan. The structures in the convention of the hoisting of the spirit, without regular...
Views: 48, Comments: 0
Go to this Forum

CR4 Feedback

713 threads, 12301 comments (0 Viewing)

Again CR4 Not Received After 24 October

11/01/2018 by dhayanandhan
Respected CR4 Admn./ CR4 members I am not receieving CR4 from 24th October, 2018. I do not know whether other members receive or not. Earlier one of...
Views: 195, Comments: 23
Last comment 11/06/2018 by Tornado

Usage Info on Air Operated Diaphragm (AODD) Pumps

10/28/2018 by JNB
After all these years on CR4, I finally have a question to ask! I'm looking for industry usage on AODD pumps- more specifically, if CR4 users have pe...
Views: 191, Comments: 11
Last comment 11/08/2018 by old salt

Denied Access to Certain Threads

10/19/2018 by dkwarner
Why am I getting the "not permitted" message today, when I attempt to view the thread "Not for Deniers"? I had no problems with it early this morning....
Views: 122, Comments: 5
Last comment 10/20/2018 by JWthetech

Where did the Denier Thread Go?

10/19/2018 by JWthetech
Missing thread Sssssshhh be wawy wawy quiet, we're hunting the denier thread
Views: 57, Comments: 2
Last comment 10/19/2018 by rwilliams
Go to this Forum

See all Blog Entries

Section Blogs

Techie Mommy

9 blog entries, 125 comments (0 Viewing)

Kindergarten Homework?

11/15/2018 by Reese
Every day, my five-year-old comes home from kindergarten with math homework. Every. Single. Day. My guess is that all the attention on STEM in rece...
Views: 304, Comments: 28
Last comment 11/16/2018 by horace40

Model Rockets and STEM Education

10/25/2018 by Hannes
Last weekend, my son received a model rocket kit for his sixth birthday. Having built and launched rockets when I was a kid, I was excited to take it...
Views: 352, Comments: 11
Last comment 10/26/2018 by SolarEagle
Go to this Blog

The Engineer's Notebook

504 blog entries, 8163 comments (1 Viewing)

Absolutely Normal Man Marries Hologram

11/17/2018 by M-ReeD
In what can only be described as the online dating world breathing a collective sigh of relief that this man is no longer on the market, Akihiko Kondo...
Views: 79, Comments: 8
Last comment 11/18/2018 by StandardsGuy

AI-Derived Perfume on Its Way

11/10/2018 by M-ReeD
Good news for those of you still scratching your heads over the continued success of Elizabeth Taylor’s White Diamonds or those of you with the...
Views: 139, Comments: 5
Last comment 11/13/2018 by Doorman
Go to this Blog

WoW Blog (Woman of the Week)

245 blog entries, 645 comments (0 Viewing)

Woman of the Week – Fabiola Gianotti

11/12/2018 by lmno24
Fabiola Gianotti is arguably one of the most important physicists in the world. She’s the first female director of the European Organization for...
Views: 59, Comments: 0

Woman of the Week – Sarah Parcak

11/05/2018 by lmno24
Sarah Parcak is an American space archaeologist and Egyptologist who has used satellite images to identify potential sites for archaeological explorat...
Views: 97, Comments: 2
Last comment 11/06/2018 by 70AARCuda
Go to this Blog

What Is It?

70 blog entries, 1884 comments (0 Viewing)

We're Back! What Is It? (November 2018)

Sorry for the long layoff CR4ers. Let's get back into the groove. First up is this tool. Yeah, maybe you can cheat with a reverse image search, but w...
Views: 538, Comments: 17
Last comment 11/12/2018 by HUSH
Go to this Blog

"On This Day" In Engineering History

247 blog entries, 864 comments (1 Viewing)

November 7, 1940 – The Collapse of “Galloping Gertie”

11/05/2018 by RSBenner
If you have ever taken a physics course, whether in high school or college, there is a very good chance that you heard about the collapse of the Tacom...
Views: 453, Comments: 14
Last comment 11/13/2018 by dkwarner

September 30, 1954 - Commissioning of the First Nuclear Submarine

09/30/2018 by RSBenner
The birth of the United States Submarine Force is considered to be April 11, 1900, the day the US Navy purchased the Holland VI Submersible (renamed t...
Views: 287, Comments: 6
Last comment 10/01/2018 by Jpfalt
Go to this Blog

Challenge Questions

370 blog entries, 29009 comments (0 Viewing)

Infrasound Inquiry: Newsletter Challenge (November 2018)

This month's IEEE GlobalSpec Newsletter Challenge is: Pigeons hold the record for the best low-range hearing abilities and can sense far lower tones...
Views: 544, Comments: 31
Last comment 11/13/2018 by StandardsGuy

Obfuscated Orbit: Newsletter Challenge (October 2018)

This month's IEEE GlobalSpec Newsletter Challenge: An amateur astronomer is certain he has calculated the precise atmospheric re-entry time of a defu...
Views: 1047, Comments: 13
Last comment 10/18/2018 by Hannes
Go to this Blog


70 blog entries, 651 comments (0 Viewing)

“Watch Your Units!” Part 2 – The Space Program

10/22/2018 by RSBenner
“Watch Your Units!” Part 2 – The Space Program “Watch your units!” There is that phrase again! I can hear it in my slee...
Views: 339, Comments: 20
Last comment 11/08/2018 by sadibo

“Watch Your Units!” Part 1 – Even Columbus Had Trouble With Units

10/12/2018 by RSBenner
“Watch your units!” If you polled engineering students, many of them would tell you that this is the phrase most often repeated by profess...
Views: 365, Comments: 12
Last comment 10/18/2018 by XNuke
Go to this Blog

Notes & Lines

45 blog entries, 424 comments (0 Viewing)

Chronic Sleep Apnea? Asthma? Try Didgeridoo Therapy

09/16/2018 by Hannes
During my time in music school I quickly learned to pick out music therapy majors: long, frizzy, unwashed hair and guitar cases slung over an individu...
Views: 421, Comments: 13
Last comment 10/01/2018 by jdretired
Go to this Blog

The CR4 Admin Blog

104 blog entries, 1536 comments (0 Viewing)

Editing Time for Posts Increased to 30 Minutes

Yesterday's software update included a change to the amount of time available for users to edit posts. We've increased this time allowance from 10 to...
Views: 65, Comments: 8
Last comment 09/21/2018 by Del the cat

CR4 Broken Link Repair Project

As part of a larger project to eliminate broken links across all IEEE GlobalSpec sites, we've been working on links in CR4 posts and comments. We know...
Views: 279, Comments: 12
Last comment 07/30/2018 by IdeaSmith
Go to this Blog

TechnoTourist’s Engineering Expeditions

88 blog entries, 571 comments (0 Viewing)

Thank Goodness for Smartphones?

08/03/2018 by BestInShow
Last week I headed south from Albany to attend my high school reunion. Both my starting point (Albany International Airport) and my destination (McGhe...
Views: 192, Comments: 3
Last comment 08/06/2018 by lyn

Solar Power in Greece: Stalled but not Out of Gas

12/19/2017 by BestInShow
As we passed through residential suburbs on the way from the airport to downtown Athens, I noticed that many of the rooftops sported solar hot water t...
Views: 406, Comments: 0
Go to this Blog

Abe's Blog

10 blog entries, 280 comments (0 Viewing)

Who Will Win the World Cup? Statisticians Take a Guess

06/18/2018 by amichelen
Last week at the start of the Russia 2018 FIFA World Cup, the national team defeated Saudi Arabia 5 to 0 in Moscow, setting in motion the next 30 days...
Views: 203, Comments: 15
Last comment 07/01/2018 by Andy Germany

What city, Amazon?

02/27/2018 by amichelen
We all know - we are waiting in anticipation - that Amazon is going to build their second headquarters, called “HQ2”, starting in early 20...
Views: 230, Comments: 15
Last comment 03/01/2018 by terrapin
Go to this Blog

Other Blog Entries of Interest

Simple End Mill Sharpening Jig

09/04/2018 posted in Workbench Creations
by Del the cat
I've been having fun with my little mini mill, but I noticed the 10mm end mill was getting a bit worn where I'd been using it to improve the quality o...
Views: 354, Comments: 11
Last comment 09/06/2018 by Del the cat

Caption This for 02/09/2018

02/09/2018 posted in Caption This!
by lmno24
Here's this week's image! I actually found this online the other day and it seemed fitting give that today is National Pizza Day. As always, be sur...
Views: 723, Comments: 26
Last comment 02/14/2018 by MR. Guest

Flight Bow Shooting Machine

01/24/2018 posted in Workbench Creations
by Del the cat
I've been messing around with flight bows and their arrows for some time and it's virtually impossible to get consistent test results. There are so m...
Views: 791, Comments: 34
Last comment 10/16/2018 by Jpfalt

Caption This for 3/31/2017

03/31/2017 posted in Caption This!
by lmno24
This week's image: Thanks to Nigh for the submission! Keep in mind we are always looking for submissions, send us photos anytime. Be sure to vote...
Views: 749, Comments: 38
Last comment 04/07/2017 by Randall

Caption This for 3/24/2017

03/24/2017 posted in Caption This!
by MaggieMc
This weeks image: Be sure to vote for your favorite caption! Thanks to Nigh for the submission, we're always looking for more!
Views: 891, Comments: 85
Last comment 04/06/2017 by szwasta