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CR4 - Recent Forum Threads and Blog Entries

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

Published: Fri, 20 Jan 2017 07:54:51 EST

Copyright: Copyright 2017

Cheap Kitchens For Sale Aylesbury Vale

Fri, 20 Jan 2017 07:54:51 EST

Cheap Kitchens For Sale Aylesbury Vale Go to cheapkitchens-uk*co*uk

Fri, 20 Jan 2017 07:53:00 EST

VrRunIT - A Full service real estate digital interactive marketing media agency

Fri, 20 Jan 2017 07:45:17 EST

VrRunIT is creative and interactive media studio delivers web and mobile development solution for real estate, property management, architectural and Interior designer company-firm.

Motor housing vs DIN 1.4470

Fri, 20 Jan 2017 07:21:20 EST

Reference EN 10213-1; Table C.1. Physical properties DIN 1.4470 is used for Motor housing. . Is this appropriate?

Fri, 20 Jan 2017 05:10:24 EST

A question for the budding Sherlock Holmes

Thu, 19 Jan 2017 19:40:19 EST

I have an aluminium garden fence with gate posts which have oval solid steel tops. The ovals insert into hollow posts (about half an inch) and weigh a few ounces so they are not being blown off in the wind. They also wedge quite tightly into the posts. Recently I've been heading to work and findi

Who knew physics would be handy while skiing?

Thu, 19 Jan 2017 19:11:23 EST

I thought this story would be of interest to engineers. The Spokesman-Review | Page O03 Thursday, 19 January 2017 Who knew physics would be handy while skiing? By Bill Jennings Correspondent Math is really hard work for me, but I’ve always enjoyed physics. Some physicists who write hav

switching regulator controller

Thu, 19 Jan 2017 18:43:58 EST

can someone please explain what the following means. Thanks "The LT3748 is a switching regulator controller specifically designed for the isolated flyback topology and capable of high power. It drives a low side external N-channel power MOSFET from an internally regulated 7V supply. No third windin

Inserting Image

Thu, 19 Jan 2017 18:36:25 EST

I'm getting really frustrated that I can't insert a jpeg into a post. Anyone know why it aint working?

Unusual Hyd Pump Wear

Thu, 19 Jan 2017 18:10:37 EST

Hello everyone, no time no see; health issues. Anyway, I'm consulting with a company regarding some hydraulic pumps and issues with these. These are vane pumps, single and double pumps, and on the smaller replaceable pump cartridge in the double pump, and on the single pumps which use a small displa

GE and Schenectady

Thu, 19 Jan 2017 15:08:49 EST

Being from the capital region of New York, I found this article pretty interesting. I particularly was interested in how people would go to work at GE right out of High School and stay their entire lives. That's pretty rare nowadays...

Load Balance Problem

Thu, 19 Jan 2017 13:21:39 EST

Hi, I am designing an electrical system with 8 branches of loads and only last branch among them has three phase load of 1 H.P. motor. Here is the summary: (1) Sum of all single phase (single phase load) currents: 17.43 amps (2) For three phase motor of 1 HP, line current = 0.60 amps. As three p

Rigging Slings Load Testing

Thu, 19 Jan 2017 12:19:52 EST

Hello, At our fertilizer plant we are using wire rope slings of different lengths. I want to know that is there any periodic load testing of these slings recommended by any international standard? If yes then what is the load at which these slings require testing. Since we are doing critical riggi

Genesis of Planetary Orbits

Thu, 19 Jan 2017 10:45:17 EST

Why do orbits follow an almost circular and elliptical path. Why not square and triangle? What's the reason behind this? Can circular orbits go nuts and decay an elliptical one?

Test for Reactor Vessel Damage Assessment

Fri, 20 Jan 2017 05:00:00 EST

An analytical method pioneered by MIT researchers could change the way operators measure damage to nuclear reactor vessels. This method could potentially provide continuous monitoring and prevent unnecessary replacement of materials. The testing method uses acoustic vibrations to gauge material dama

Caption This for 1/20/17

Thu, 19 Jan 2017 21:45:00 EST

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

The Nature of Structure

Thu, 19 Jan 2017 16:00:00 EST

The other afternoon I was reading about how sea sponge spicules could inspire stronger columns, and it reminded me of a structures course I took in college. Let me set the scene for you: 25 terrified first-year students and an ancient ex-Turkish military man with an accent so strong you couldn&rsquo

FIA Joins Effort to Demand Restoration of the Bonneville Salt Flats

Thu, 19 Jan 2017 14:00:00 EST

As racers and supporters of land-speed racing at Utah’s Bonneville Salt Flats prepare to go to Congress with demands for the restoration of the racing venue, the international racing organization that oversees land-speed records has thrown its support behind those demands. In a letter to the

FINALLY...A Standardized Japanese Toilet

Thu, 19 Jan 2017 05:00:00 EST

Many aspects of Japanese culture baffle Westerners. Yaeba, or the practice of implanting vampire-like canines, is a popular beauty technique among young women. There are hotels where you can sleep in capsules and restaurants that serve gourmet canned food. Scores of young men choose to cloister them

Plastic Solar Cells More Efficient

Thu, 19 Jan 2017 05:00:00 EST

As plastic solar cells now rival silicon-based solar cells in power conversion efficiency, researchers want to increase the range of photonic energies that they can absorb. North Carolina State University researchers have developed a strategy for fabricating more efficient plastic solar cells that c

Building a Bridge Over the Bering Sea

Wed, 18 Jan 2017 18:36:16 EST

The most widely-accepted explanation for the settlement of the Americas by indigenous peoples is that, between 16,500 and 11,000 years ago, several thousand ‘paleoamericans’ crossed a grassland steppe that today is Far East Russia, the floor of the Bering Sea, and Alaska. During the Late

New Bill Aims to Preserve Route 66 Ahead of Centennial Celebrations in 2026

Wed, 18 Jan 2017 14:00:00 EST

While much of Route 66 remains in existence and in use, its decommissioning more than 30 years ago has left its fate largely to the various states through which the Mother Road passes, but a new bill proposes to not only coordinate the preservation of the highway on a federal level but also to provi

Rising Use of Solar Trackers in Grid-Scale PV

Wed, 18 Jan 2017 05:00:00 EST

According to a recent report from GTM Research, 12.6 GW of PV trackers will be installed globally this year, up from 5 GW in 2015. As the use of grid-scale photovoltaic (PV) systems continues to grow, a new solar tracking technology can improve production at PV farms by anywhere from 15-30% when com

Silicone Gaskets with High Flex-Fatigue Resistance

Tue, 17 Jan 2017 21:45:00 EST

Silicone gaskets have many desirable properties. They’re chemically inert, resistant to ozone and ultraviolet light, offer thermal stability over a wide temperature range, and can repel water and form watertight seals. Silicone rubber is used in a variety of sealing and insulation applications