bonjour à tous,
magnifique résumé au sujet du moteur BURLAT 8 cylindres (1909) :
http://www.hydroretro.net/etudegh/moteu ... burlat.pdf
court extrait :
"Basé sur un brevet ancien puisque déposé
le 9 avril 1904 (n° 23.079), le « birotatif
» Burlat de 35-40 ch est présenté à
Paris au Salon de l’aéronautique en septembre
1909. Il fait sensation. Mais personne
dans la presse n’est capable d’expliquer son
fonctionnement. Bi-rotatif ? L’ingénieur
chargé de sa présentation parle du théorème
de Lahire."
croquis en coupe avec le texte en anglais :
In the Burlat engine, B becomes the axis of the crankshaft ; BQ the crank; Q the crank-pin; while P'P materialises into a rigid rod, eye-jointed to the crank-pin Q as indicated, and produced as shown; each end carries a piston S, sliding in a cylinder, these cylinders forming one with the large circle, and rotating with it about the axis O.
Thus the Burlat engine possesses the singularities of (1) a single connecting-rod rigidly fixed to two opposed pistons S', S; (2) the cylinders and casing turn about the axis O in the same direction as the crankshaft turns about its axis B, but at only one-half the speed; and (3) each piston has a stroke equal to four times the crank radius BQ, and performs this stroke while the crankshaft makes one complete revolution.
Actually a two-throw crankshaft was employed, with the throws at 180°, and a second pair of cylinders was mounted on the casing with their common axis at right angles to that of the first pair, as indicated by TQ'T'. The engine was arranged to work on the four-stroke cycle, so that the crankshaft made four, and the cylinders two, revolutions per cycle.
DES l'ORS IL EST EVIDENT QUE NOTRE AMI YVES A NETTEMENT FAIT EVOLUER LE CONCEPT EN PROPOSANT SA NOUVELLE CINEMATIQUE AVEC 3 PAIRES DE PISTONS
un vilebrequin orbital à 3 manetons ? il fallait oser ! bravo Yves !
A+ les amis