At the start of this, it's probably worthwhile to repost the following: In the early 1970’s, when the Brezhnev era seemed most full of promise, an elderly Frenchman travelled from Moscow to Khabarovsk on the Trans-Siberian railway. After only a few hours at the eastern end of the line he boarded the train again for … Continue reading Diesel Hammers: The Russian Hammers and Hemi-Headed Pile Drivers
Now we get into a topic that's potentially controversial: the energy rating of diesel hammers, or any impact hammer for that matter. Let's start with defining what we mean by rated energy. Efficiency and Rated Striking Energy Hibbeler (1989) defines mechanical efficiency as follows: $latex e = \frac{Energy\,Output}{Energy\,Input} $ (15) A quick look at Equation … Continue reading Diesel Hammers: Rated Striking Energy, and Should Diesel Hammers Be Derated?
It is my custom to link to and make comments on papers which cite my work. This paper is titled Construction of a mathematical model of dynamic loads in a jib self-propelled crane when pulling a sheet pile out of the ground. It comes from Ukraine, and it is the first study of its kind … Continue reading Comments on “Construction of a mathematical model of dynamic loads in a jib self-propelled crane when pulling a sheet pile out of the ground.”
As noted elsewhere, Vulcan got itself into many products outside of pile driving equipment. One of those was railroad equipment. Some of these didn't work out as planned, as was the case with the Caldwell Steam Snow Plow. Others, ostensibly, had a happier outcome for everyone. In the absence of evidence to the contrary, one of … Continue reading The Hicks Track Laying Machine, and an Example of Belt/Band Friction
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