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Tag Archive: mechanical engineer

Children Will Fall At Playgrounds. What Shall We Do To Protect Them? A Multipart Blog Series – Part I
October 11, 2017 7:24 am Leave a Comment
A 5-year old boy was severely injured at a public playground when he fell through a second floor opening around a fireman’s pole in a playhouse. He fell more than seven feet and struck a bare concrete floor. We are thankful that he eventually recovered from his injuries. The person who designed and built the playground was accused of negligence. A lawsuit ensued, and eventually settled in favor of the boy. (more…)
Should I Trust My Nail Gun?
July 11, 2017 9:21 am Leave a Comment
Can you imagine framing a house with the tools of our forefathers, using hand saws and hammers, rather than power saws and pneumatic nail guns? Power tools have made the job much easier and faster, that even the amateur is well equipped for this kind of work. (more…)
Graphitic Corrosion – Difficult to determine before a failure!
June 30, 2017 9:51 am Leave a Comment
Graphitic corrosion is a process that may happen in equipment made of iron, particularly grey cast iron, but also ductile cast iron. Graphitic corrosion can lead to unexpected catastrophic failure of the affected part because the cast iron can lose its strength without a visible warning such as a change in size, shape, or appearance. (more…)
Improper Design Leads to Fatigue Failure In Blower Shaft
April 27, 2017 2:51 pm Leave a Comment
A blower used to exhaust air from an industrial process stopped functioning when the blower wheel drive shaft fractured. The process, and thereby most of the plant, had to operate at a reduced volume until the blower wheel could be replaced. The blower wheel had been installed during a shutdown a week before the incident. The blower wheel was a spare installed when the existing blower wheel was sent for scheduled remanufacturing. (more…)
Injury Involving a Capstan Winch
February 22, 2017 9:43 am Leave a Comment
A capstan winch uses a mechanically powered rotating cylinder, called a capstan, to apply pulling force through a rope. When the rope is looped around the rotating capstan and tightened, friction between the rope and capstan allows the winch to apply force to pull a load. A typical capstan winch is shown in Figure 1 below. (more…)
Defective Clevis Pin Culprit in Runaway Trailer
October 24, 2016 9:06 am Leave a Comment
A large agricultural trailer had been connected to a truck using a clevis pin with a spring locking clip. The trailer became disconnected from the truck and collided with an oncoming vehicle. The trailer was in poor condition, did not have safety chains, and had substantial recent modifications by the owner. (more…)
Are You Prepared for Emergencies? Your Generator Set Should Be!
October 13, 2016 10:13 am Leave a Comment
Emergency generators are often called into service during catastrophic events like hurricanes, floods, tornadoes or fires, but also during more mundane events like thunderstorms and other things that may temporarily interrupt the public power grid. Can you rely on your generator to perform at those critical times? (more…)
Another Dimension of Engineering, Part 2: Visual Demonstrations Can Clarify the Issue
June 20, 2016 9:34 am Leave a Comment
In our last post on 3D scanning, we introduced Warren’s new Faro Focus X 330 three dimensional scanner. To recap, the Faro scanner combines three dimensional laser measurement with automated photography to capture 360-degree data from the real world. Potential applications include vehicle accident scenes and damaged vehicles, structural collapses, fire scenes, flood damage scenes, and machinery and equipment analysis, among others. In this post, we will highlight some of the outputs that can be created from the detailed data captured by the scanner. (more…)
Warren Adds Another Dimension of Engineering
May 3, 2016 9:49 am Leave a Comment
We at Warren are pleased to announce our recent purchase of a Faro Focus X 330 three dimensional scanner with FARO Scene image processing software. The scanner takes up to 976,000 data points per second and can scan objects at distances to 1000 feet. The scanner forms a point cloud of millions of data points while also capturing 360 degree panoramic photographs. By combining a series of scans, a three dimensional representation can be created that enables precise measurements, animations, and demonstrations. The scanner can capture imagery indoors, outdoors, and even in darkness. (more…)
Why Should I be Concerned About Galvanic Corrosion?
April 22, 2016 3:32 pm Leave a Comment
It is fairly common knowledge that the use of dissimilar metals in plumbing systems can quickly result in a leak due to a corroded pipe or fitting. (more…)

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