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CR4 - Recent Forum Threads and Blog Entries



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



Published: Sun, 25 Sep 2016 04:00:00 EST

Copyright: Copyright 2016
 



Flow Metter for Painting Application

Sat, 24 Sep 2016 08:50:10 EST

Dear all, Does anyone know the most suitable flow metter used in the application as below: * Normal flowrate: 1 l/minute * Normal temperature ~25-30; Max pressure ~ 5 bar * Fluid: It is a mix of painting powder and water (viscosity not high-I don't know exactly the value) I 've considered abou



Civil Engineering? Design Interview

Fri, 23 Sep 2016 19:25:00 EST

I am currently in a PLTW class where we need to interview someone in the civil engineering or product design field. I was wondering if anybody would be willing to do an interview for said project. The information I would need be relate to the school you attended, degree aquirred, company you work fo



How to Find Voltages Between Light Bulbs in a Series Circuit and Current?

Fri, 23 Sep 2016 15:54:48 EST

I am doing my lab for my Electricity and Electronics class on Multisim and cannot figure out, in a series circuit, coming from a function generator producing 24Volts that has a 12V 10W light bulb in series with a 12V 25W light bulb that is then in series with a 1k ohm resistor, which then connects b



HOIP Solar Cells

Fri, 23 Sep 2016 13:26:42 EST

Hybrid Organic-Inorganic Perovskite solar cells efficiency breakthrough, opens up a series of new engineering possibilities, exclaims Professor Zhu. https://www.theengineer.co.uk/us-team-claims-solar-cell-efficiency-breakthrough/?cmpid=tenews_2657567 Now with efficiency already at 22% (further adv



CR4 App for Smartphone

Fri, 23 Sep 2016 11:58:18 EST

I sometimes look at CR4 using my smartphone (iphone 6s+). I noticed this morning that once I added a comment to a thread there was no way to get back to the CR4 home page directly. I could click on a link to 'Engineering 360', but the button/hyperlink text line that goes to CR4 directly wasn't there



Non Overloading Impeller

Fri, 23 Sep 2016 05:34:37 EST

I was reading going through a specification for HRSG (Heat recovery steam generator) feed pumps (often called as BFP - Boiler feed pump). The owner had specified that the Impeller of the pump should be non-overloading type. Can anybody explain what exactly is this non-overloading type of impeller?



Mastercam2017 Complete Video Tutorial:

Fri, 23 Sep 2016 03:47:42 EST

This video guide how to make a NC program from beginning to ending. https://www.facebook.com/mastercam2017/



Dead Wireless Mice

Fri, 23 Sep 2016 01:35:25 EST

Hi all, I am looking for answers re failure of my wireless mouse working fine then next reboot nothing, this is running on Win 8.1. The transmitter is being recognized and shows in device manager as a HID compliant mouse. I have 3 wireless mice all have same result. Any suggestions what would be c



Trolls? Just Paint 'Em

Thu, 22 Sep 2016 17:02:22 EST




Microscopic Life Sensor

Thu, 22 Sep 2016 15:56:41 EST

I am looking for a "simple" way to detect if there is microscopic life in a water sample. I mean bacteria, amoebae, small eggs, and other critters. Basically anything that you cannot see easily but can make you very sic if you drink the water. I left viruses out because of their order of magnitude i



Robots Helping Robots

Sun, 25 Sep 2016 04:00:00 EST

Imagine what industry might look like if robots could cooperate with each other spontaneously using body language as their guide. In a manner similar to human communication, a robot that needs assistance waves and points to get the attention of another robot. That robot stops what it is doing and ar



Standards Q&A: Interpreting ASME’s Post Weld Heat Treatment Requirements

Sun, 25 Sep 2016 04:00:00 EST

ASME Standards often require careful reading in order to interpret them correctly and engineers can be left with questions about some details. In this post we take a look at an engineer’s welding question related to a vessel’s heat treatment. Question: My shop is constructing a Section



Raygun Guitar Makes Music with Quadrant Techtron® HPV PPS

Sun, 25 Sep 2016 04:00:00 EST

For decades, luthiers (individuals who make or repair string instruments generally consisting of a neck and a sound box) have been searching for the perfect material for their guitar nuts. The nut is part of a tremolo system, allowing guitarists to press a lever to loosen the instrument strings and



Battery Technology is Finally Catching Up

Sat, 24 Sep 2016 04:00:00 EST

At long last, battery technology has begun to show signs of advancing, the way the rest of the electronics industry has for decades. This startup recently unveiled a lithium-metal battery that delivers twice the power of today's ubiquitous lithium-ion batteries without sacrificing safety or longevit



Full Steam Ahead!

Fri, 23 Sep 2016 04:00:00 EST

Steam is responsible for generating 80% of the world's power. It's required for coal, combined-cycle natural gas, nuclear, geothermal, and even concentrated solar plants. Steam has played a key role in power generation for nearly 100 years, so what does the future hold for this venerable technology?



Zee, Zed, or Zulu for Thermal Acoustic Insulation

Thu, 22 Sep 2016 20:55:00 EST

Americans say “Zee” for the letter Z. Canadians say “Zed” instead. In both North American countries, their militaries say “Zulu” so that radio or telephone messages can be understood clearly. If you’re a defense contractor that makes military vehicles, it&rs



Caption This for 9/23/16

Thu, 22 Sep 2016 20:45:00 EST

This week's image: Be sure to vote for your favorite caption! Thanks to brich for submitting this image.



Hemmings Cinema: Ferrari on Ferrari, the First turbine Chrysler, Dying to be a Hero

Thu, 22 Sep 2016 13:00:00 EST

* Dating to 1984, this 25-minute interview with Enzo Ferrari is probably the best such interview put down on video and the best account of Ferrari from Ferrari himself. * Chrysler didn’t just whip up the Turbine cars in 1964 out of nowhere. The company’s turbine program dated back yea



Cyclical or Structural - the Oil Price Debate Continues

Thu, 22 Sep 2016 04:00:00 EST

Are oil prices still cyclical, or is there something new going on? As the industry digs itself out of the third largest price decline in 30 years, some analysts are putting the blame on a new series of "structural shocks." If you believe the latter reasoning, the possibility that oil prices will rem



The Death of 3D Printing Has Been Greatly Exaggerated

Wed, 21 Sep 2016 19:14:00 EST

Did you get the memo? Perhaps you read the obit. 3D printing is dead. Over. Done with. Kaputski. This past summer there were many articles criticizing 3D printing’s struggle to stay relevant. Stratasys and 3D Systems, two of the leading 3D printing companies, saw their stock surge 333% and 80