Johann Albert Eytelwein (31 December 1764 – 18 October 1849) was a German engineer who was among the first to examine mechanical problems dealing with friction,

pulleys Sheave without a rope A pulley is a wheel on an axle or shaft enabling a taut cable or belt passing over the wheel to move and change direction, or transfer power between itself and a shaft. A pulley may have a groove or grooves between fla ...

, and

hydraulics Hydraulics () is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counterpart of pneumatics, which concer ...

. Eytelwein was born in

Frankfurt Frankfurt am Main () is the most populous city in the States of Germany, German state of Hesse. Its 773,068 inhabitants as of 2022 make it the List of cities in Germany by population, fifth-most populous city in Germany. Located in the forela ...

to Christian Philipp and Anna Elisabeth Katharina née Hung. He joined the Prussian army in 1779 and became a bombardier in the 1st Artillery Regiment later serving under General von Tempelhoff who kindled an interest in engineering. He then trained as a surveyor and in 1790 became an inspector of buildings. His building department published the first German journal of civil engineering, ''Sammlung nützlicher Aufsätze und Nachrichten, die Baukunst betreffend'' and in 1799 he was among the founders of the Berlin Bauakademie ("Building Academy"). He received an honorary doctorate from

Berlin University The Humboldt University of Berlin (, abbreviated HU Berlin) is a public research university in the central borough of Mitte in Berlin, Germany. The university was established by Frederick William III on the initiative of Wilhelm von Humboldt ...

in 1811. His major publication was the ''Handbuch der Mechanik fester Körper und Hydraulik'' ditions in 1801, 1823, 1842and the ''Handbuch der Statik fester Körper'' 808, 1832 In these works he examined pulleys and belts and examined the forces involved, developing on the theory of Euler. The Euler-Eytelwein Formula, also known as the

capstan equation The capstan equation or belt friction equation, also known as Euler–Eytelwein formula (after Leonhard Euler and Johann Albert Eytelwein), relates the hold-force to the load-force if a flexible line is wound around a cylinder (a bollard, a wi ...

was one of the key ideas introduced by him.

References

External links

Handbuch der Hydrostatik (1826)

Handbuch der Statik fester Körper (1808) Volume I
https://archive.org/details/handbuchderstat02eytegoog Volume II]
Beschreibung der Erbauung und Einrichtung einer vereinigten Brauerei und Branntweinbrennerei auf dem Lande (1802)
* iarchive:praktischeanweis00eyte, Praktische Anweisung zur Konstrukzion der Faschinenwerke : und den dazu gehörigen Anlagen an Flüssen und Strömen nebst einer Anleitung zur Veranschlagung dieser Baue (1800) {{DEFAULTSORT:Eytelwein, Johann Albert German engineers 1764 births 1849 deaths Engineers from Frankfurt 18th-century German engineers