Pour les tripeux de Wadkin!

Outils_Viel écrit: Pas encore mais j'ai bien hâte. Faut que je me trouve du flox et un peu d'argent. C'est sûr que je ne m'en servirai pas parce que j'ai déjà un soudeuse à lames mais ça reste un belle tite machine d'environ 60 lbs.

Outils_Viel écrit:

25 Hz origins

The first generators at the Niagara Falls project, built by Westinghouse in 1895, were 25 Hz because the turbine speed had already been set before alternating current power transmission had been definitively selected. Westinghouse would have selected a low frequency of 30 Hz to drive motor loads, but the turbines for the project had already been specified at 250 RPM. The machines could have been made to deliver 16⅔ Hz power suitable for heavy commutator-type motors but the Westinghouse company objected that this would be undesirable for lighting, and suggested 33⅓ Hz. Eventually a compromise of 25 Hz, with 12 pole 250 RPM generators, was chosen.[8] Because the Niagara project was so influential on electric power systems design, 25 Hz prevailed as the North American standard for low-frequency AC.