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Recent content from CR4, The Engineer's Place for News and Discussion

Published: Sat, 19 Aug 2017 09:02:59 EST

Copyright: Copyright 2017

Pouring water at underground

Sat, 19 Aug 2017 09:02:59 EST

Want to pouring ETP water at underground. It may be 130 feet depth from the ground label. What is the arrangement is required and which equipment are required. Also if get youtube link will be better.

High pressure air flow

Sat, 19 Aug 2017 07:53:03 EST

Want to flow air @ 25m3/min with 40 Bar air pressure, at a distance of 100 mtr with 08 nos bending. What will be the pipe size. What is the calculation method.

This never gets old.

Fri, 18 Aug 2017 21:04:07 EST

Living in a northern Detroit suburb, I am only about 3 miles from Selfridge A.N.G.B. I see military aircraft all the time. No big deal, right? Today I get home and get in my house and the rumble starts, gets louder and louder, I run outside and see 6, white with red and blue accent, F-16's flying in

How Many of You Plan to Watch the Eclipse?

Fri, 18 Aug 2017 17:01:55 EST

Those of you who are in the path of totality--you're lucky! I waited too late to get appropriate eyewear, so I'll probably put my head in a box fitted out as a pinhole camera. Please, no more bad jokes about the box and my head; Mr. Best in Show either has or will make them.

Stepper Motor

Fri, 18 Aug 2017 16:24:49 EST

I am need a suggestion for specifications for stepper motor.That I want the stepper motor for turn 60 degree and some process is done then to another 60 degree and so on.I want to repeat this for 6 times and totally 360 degree and also you can program in keil..

Arduino IDE Compile Error Oddity

Fri, 18 Aug 2017 15:52:47 EST

In a Windows 10 OS, using version 1.8.2, supposedly using the updated libraries, I had been having fits over a simple load cell sketch with LCD 20x4 display, and a data logger shield with real time clock (RTC). All of the problems results in cryptic error messages for the file verify step before upl

Atlas V Launch Success

Fri, 18 Aug 2017 12:45:26 EST

Burning 2500 lbs of fuel per second here↓↓

Dog-Walking Drone

Thu, 17 Aug 2017 14:55:57 EST

This strikes me as the kind of thing that you shouldn't do even if it's theoretically possible. I think my dogs would try to catch and kill the thing.

Ring Main Units

Thu, 17 Aug 2017 13:51:54 EST

Hi, What is 3 way, 4 way and 5 way extensible ring main units? Best Regards,

Groundwater Remediation System Design

Thu, 17 Aug 2017 13:05:16 EST

I am interested in harsh environment chemical resistant solenoid valves. More specifically, I am designing a groundwater remediation system. The remediation process will entail the use of ozone gas and 15%-20% hydrogen peroxide, both under pressure (5-75 psi). They will be injected at various rates,

The Relaxing Effect of Video Games

Sat, 19 Aug 2017 04:00:00 EST

In what my husband has called the best news of the summer, researchers from the University of Central Florida believe that the cognitive fatigue often associated with high-stress jobs can be remedied by quick video-game-playing breaks throughout the course of the day. According to the study publish

Caption This for 08/18/2017

Fri, 18 Aug 2017 20:45:00 EST

Here's this week's image: Be sure to vote for your favorite caption! Thanks to Nigh for the entry.

Which One of These Hurst/Olds Would You Take Home?

Fri, 18 Aug 2017 13:00:00 EST

A guy walks into a car show’s invitational display building with a pocket full of cash and a craving to buy a Hurst/Olds. He’s immediately greeted by a pristine example of a ’72, a ’74, and an ’84 that represent three different eras of the H/O’s production run&hel

Who Built It Better? Loewy v. Stevens v. Wright on the Lincoln Continental

Thu, 17 Aug 2017 13:00:00 EST

Typically, it’s a fool’s errand to compare two or more designers, if not due to the subjectivity of aesthetics, then certainly due to the fact that designers’ bodies of work tend to be so dissimilar it becomes an apples-and-oranges comparison. However, that task becomes much more p

N.Y. Startup Breaks Ground with an Off-Roading EV

Wed, 16 Aug 2017 13:00:00 EST

In July, New York State-based Bollinger Motors revealed an all-electric sport utility vehicle that promises serious off-roading capabilities. At first glance, the Bollinger B1 looks like a prototype for the first-generation International Scout or Land Rover Series 1, but below the exposed rivets th

Guess the Architecture for 8/15/2017

Tue, 15 Aug 2017 18:00:00 EST

Do you recognize this week’s building? Care to take a guess?

Open Diff: What to Wear?

Tue, 15 Aug 2017 13:00:00 EST

A few weekends ago, when I got suited up to help campaign my club’s car on the beach at The Race of Gentlemen in Wildwood, New Jersey, I pulled on a vintage-style knit racing jersey; baggy pants; tall, lace-up leather boots of the kind worn in World War I by motorcyclists and aviators; and cla

How to Install Edge Trim

Mon, 14 Aug 2017 21:40:12 EST

Edge trim protects exposed edges and the people who come into contact with them. In addition to sealing and insulation, edge trim provides a finished appearance to surfaces such as the metal doors on vehicles, machinery, and equipment. Choosing the right type of edge trim for your application is imp

Laser Engraving Applications in the Industrial Space

Mon, 14 Aug 2017 13:00:56 EST

The ability to customize specific items, protect intellectual property and include safety measures is leading to the growth of laser engraving for industrial applications. Beyond use for businesses looking to add a logo or specific branding to items, laser engraving offers a way to leave permanent m

Even More Good News for Booze Lovers the World Over

Sat, 12 Aug 2017 04:00:00 EST

Recently, I wrote about how alcohol (Let’s face it! I will probably write about this topic a lot. It’s kind of in my wheelhouse.) can preserve memory, particularly of those moments before a person drinks. So it stands to reason that alcohol consumption would also have some sort of effect