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, and hydraulics. Eytelwein was born in

Frankfurt Frankfurt, officially Frankfurt am Main (; Hessian: , "Frank ford on the Main"), is the most populous city in the German state of Hesse. Its 791,000 inhabitants as of 2022 make it the fifth-most populous city in Germany. Located on its na ...

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 The Bauakademie (''Building Academy'') in Berlin, Germany, was a higher education school for the art of building to train master builders. It originated from the construction department of the Academy of Fine Arts and Mechanical Sciences (from ...

("Building Academy"). He received an honorary doctorate from

Berlin University Humboldt-Universität zu Berlin (german: Humboldt-Universität zu Berlin, abbreviated HU Berlin) is a German public research university in the central borough of Mitte in Berlin. It was established by Frederick William III on the initiative o ...

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's 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 w ...

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