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So far PEimpact JH has created 75 blog entries.

Why the U.S. Isn’t On the Metric System

Try ordering a 113.3981-grammer burger at your local McDonald’s or Burger King. And then don’t be surprised when they don’t understand your order! That’s because the United States has not yet fully adopted the metric system. As a result, most U.S. citizens are not familiar with it ...

By |2023-02-22T09:18:55-06:00September 3rd, 2021|Tuesday Tidbits|27 Comments

The Baldwin Hills Dam Disaster

Constructed during and immediately after World War II, the Baldwin Hills Reservoir was intended to provide a reserve supply of safe water for people living in the Los Angeles area in case of emergency. The dam, built between 1947 and 1951 by the Los Angeles Department of Water and Power ...

By |2023-02-22T09:15:07-06:00August 26th, 2021|Friday Famous Failures|2 Comments

Engineering Ingenuity of the Ancient Romans

While the Ancient Greeks are often lauded for their contributions to many fields such as poetry, philosophy, and mathematics (to name a few), the incredible engineering feats of the Ancient Romans were instrumental in their infrastructural and organizational efforts, and these ingenuities are employed by engineers even today ...

By |2023-03-20T12:54:35-06:00May 31st, 2021|Tuesday Tidbits|1 Comment

Collapse of the Willow Island Cooling Tower

In the 1970s, power companies began building many new coal-fired electrical power plants in the Ohio Valley to feed the growing industry in that region. These power plants were close to coal mines, so the electricity they generated was less expensive than nuclear or hydroelectric ...

By |2023-02-22T09:15:19-06:00May 27th, 2021|Friday Famous Failures|11 Comments

Digitally Signing and Sealing Your Plans

Digital Signatures are added with the aid of a third-party authentication program, which both ensures that the Professional Engineer is the one signing the document and prevents future repudiation. The authentication programs can vary, but they function by assigning an individual “certificate” that verifies identity ...

By |2022-09-15T08:18:49-06:00May 3rd, 2021|Tuesday Tidbits|4 Comments

Airplane Propeller-Induced Flutter

One night in September 1959, a Lockheed Electra L-188A turboprop aircraft with 28 passengers and 6 crew apparently disintegrated mid-flight over Buffalo, Texas. The Electra was new at the time, the first large turboprop airliner built by a United States aircraft company ...

By |2023-02-22T09:15:23-06:00April 29th, 2021|Friday Famous Failures|8 Comments