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CR4 - Recent Forum Threads and Blog Entries



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



Published: Wed, 23 Aug 2017 13:00:00 EST

Copyright: Copyright 2017
 



Liquid and Tank

Wed, 23 Aug 2017 03:33:47 EST

What is the calculation between density of any liquid leakage from different height from tank ??



CNC Hydraulic System

Wed, 23 Aug 2017 01:17:35 EST

Hello Dear Hope going well & like to inform you that we have a CNC press break machine, now we are facing a problem with hydralic system. The problems are below 1. Firstly the machine was switch off about 2 year and many times try to start the machine , In this 2 year the hydraulic beam goes 5



Solar Eclipse Photos, Aug 2017 Eclipse

Tue, 22 Aug 2017 21:50:23 EST

I was fortunate to be in a cloud free area in Northern Georgia, during totality for the Aug 21st total solar eclipse. Clouds were all around the area, spoiling the view at some popular locations like Rabun Gap and Brasstown Bald (the highest peak in GA.) I'd experienced one total eclipse before, on



Wife and I Discussing Train Safety Issue

Tue, 22 Aug 2017 15:49:29 EST

We have been hearing on the news channel we watch (guess who) about train safety, whether industrial cargo train, passenger, or commuter. Apparently, the subversives (terrorists) have been chattering about using various means of derailing trains. In light of this morning's event in Pennsylvania (lo



Designing Braking/Accelerating System

Tue, 22 Aug 2017 11:25:38 EST

I have designed an handcart that is to be powered by an engine. I would like it to have a provision such that when the operator releases the accelerator, the brakes engages immediately but I don't know how to go about it. Any help will be appreciated.



Stack Design_STS-1

Tue, 22 Aug 2017 10:30:06 EST

Hello everyone, For stack, designed as per STS-1, i am in a situation that mean critical velocity is lower than Critical speed for vortex shedding. So far i know by introducing helical strakes or other attachments, critical velocity can be increased. But my question is how to evaluate critical veloc



Impacts of Rotation of Moon

Mon, 21 Aug 2017 21:20:44 EST

As I never studied Astrophysics during University years, I am asking the following from a naive standpoint. After watching the "great" [TIC] solar eclipse of 2017, I started wondering about a few facts about the moon: I understand the observable face of the moon is directed towards us continually,



Just Now OR, USA

Mon, 21 Aug 2017 17:12:58 EST




LOSS Tank Modifications

Mon, 21 Aug 2017 14:54:22 EST

Hello, here on campus, the plumbing for the pumping chambers of each of the 4 Step Systems in the Large On-Site Septic System (L.O.S.S.) is configured in such a way that some of the periodic maintenance we are obligated to perform is not practical, or even possible. The L.O.S.S. was overhauled in



Units of Measurements and Conversions

Mon, 21 Aug 2017 14:41:49 EST

Hello I am going to ask a seemingly elementary question but I really need some help with this. If I have a motor that's 15HP and runs at 30RPM that equals 2626 ft-lbs of torque. To go from ft-lbs to n.m 1ft-lb = 1.36 n.m 2626ft-lb= 3560.378Nm This is where I have trouble and i am not sure how t



Can Engineering Work and Marketing Help to Repopulate the Former Buick City Site?

Wed, 23 Aug 2017 13:00:00 EST

From the air, the stark gray remains of Buick City, a sprawling Flint, Michigan, plot roughly bordered by East Pierson Street, East Wood Street, Industrial Avenue/North Street, and James P. Cole Boulevard, stand in contrast to the residential neighborhoods and commercial properties that surround it.



Guess the Architecture for 8/22/2017

Tue, 22 Aug 2017 18:00:00 EST

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



Living in a Pig: Mitchell Joachim’s In Vitro Meat Habitat

Tue, 22 Aug 2017 15:00:00 EST

A month ago when I wrote about structures grown from mushrooms, I imagined I’d found myself the strangest potential future for grown buildings. I was so very wrong. In 2008, Mitchell Joachim, co-founder of Terreform, a nonprofit organization for philanthropic architecture, urban, and ecologic



Will the First McLaren F1 Imported into the United States Set a New Pricing Benchmark?

Tue, 22 Aug 2017 13:00:00 EST

Billionaire auto magnate Herb Chambers is looking to cash in on one of his best investments: a one-of-a-kind British sports car from his personal collection that may fetch a record-shattering price. Chambers is putting his 1995 McLaren up for auction in California later this month. It’s not k



Woman of the Week – Mary Anderson

Mon, 21 Aug 2017 20:30:00 EST

We can thank Mary Anderson when we drive in the rain or snow. She’s the inventor of the automatic windshield wiper. During a visit to New York City in 1902, she was riding the trolley when she noticed the driver had both windows open to keep them clear of the falling snow. She thought that th



How to Install Locking Gaskets

Mon, 21 Aug 2017 18:21:00 EST

Locking gaskets are lengths of rubber that lock into place to provide a secure seal between stationary glass and a body panel. These rubber gaskets are used with the windows and windshields on mobile equipment such as trains, trucks, and buses. They’re also used with the viewing windows on enc



Open Diff: Tool Chest or Black Hole?

Mon, 21 Aug 2017 13:00:00 EST

I have a confession to make: I am a tool hoarder. Were I loyal to one brand of automobile or motorcycle, or even a single nationality, this would pose less of a problem, but over the course of three-and-a-half decades driving or riding vehicles from around the globe, I’ve amassed quite a colle



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