Death Marks Time in Prague
The astronomical clock in Prague is the oldest still in operation (first installed in 1410). The impressive clock has three main mechanical components — the astronomical dial, the calendar dial, and an hourly display of figures and sculptures. The astronomical portion shows the position of the Sun and Moon and the calendar dial shows the months of […]
FEATURED TESTIMONIAL – 5-Star Google Reviews for DTC
We opened up our Google Reviews recently, and we’re proud to share our first Google Reviews, all are 5 Stars! Mechanical PE Exam Prep That WorksTest Drive Your Course for Only $50! Dr. Tom’s Classroom – Your the Extraordinary
Not a Cold Day on the Sand
The Finns have taken sand and turned it into an energy storage battery. Using insulated holding tanks that are 4 meters in diameter by 7 meters high filled with hundreds of tons of sand, the unit can store 8 MW-hours of heat, when the sand is heated to 500-600°C. The heat is used to keep […]
Get a Grip – From a Dead Spider?
Ok, we are going off the deep end here. Mechanical engineers at Rice University have discovered that dead spiders have an incredible grip. Wolf spiders that they have been doing research on in the lab can pick up as much as 130% of their body weight – when dead that is. Apparently, unlike most other […]
Keeping a Smile on the Mona Lisa in Summer’s Heat
The Louvre Museum and all of Paris have experienced one of the hottest summers in memory. Yet, what’s keeping the Mona Lisa and the millions of visitors cool and comfortable is not immediately obvious. A joint venture company named Fraicheur de Paris [literally – “freshness of Paris”] and jointly owned by EDF (France’s largest energy […]
FEATURED TESTIMONIAL – “DTC was 99% of what mattered to my preparation.”
“I passed the PE on my first try. I did the DTC course as well as a couple other prep exams. Those tests were ok for continued practice, but the DTC program was 99% of what mattered to my preparation. I would have been fine with just DTC. Dr. Tom’s program was exceptional considering the […]
A New Frontier – Again
On May 25th, 1961, in a special message to Congress, President Kennedy gave the country, and NASA in particular, the goal of landing a man on the moon by the end of the decade. While he did not live to see that goal achieved, it was in July 1969. In December 1972, Apollo 17 would […]
DTC – Better Prices with Flexible Payment Options
At DTC, we realize that the expense of exam prep makes embarking on preparation for the PE Exam even more daunting. That’s why we are committed to making it as stress free and affordable as possible for you to get started on your way to becoming a PE. With our Test Drive option and our […]
DTC’s Testimonial Page – Hear What Our Students Are Saying
Taking the PE Exam is a daunting endeavor, and choosing a PE Exam prep course is a major decision. That’s why we have worked so hard to make our courses the best Mechanical PE Exam prep courses out there and to keep our prices as low as possible. We’ve had hundreds of students who have […]
A Truly Kafkaesque Statue
Art and mechanics meet in Czech artist David Černý’ kinetic sculpture “The Head of Franz Kafka.” With 42 reflective, mechanized layers that rotate individually, it creates an every changing portrait of Kafka’s tortured psyche. It operates from 8AM to 9PM each hour for 15 minutes in Prague, Czechia. On a recent trip I was able to […]
