Word: two
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Dates: during 1950-1959
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...made her first real splash in 1947 with the Stockholm Opera singing Verdi's Lady Macbeth. Gradually she developed a repertory that now includes all the Wagnerian soprano parts, many of the great roles of Verdi, Puccini, Richard Strauss, plus an assortment of contemporary roles. Two and a half years ago (TIME, June 3, 1957), her Isolde at Florence's Maggio Musicale was one of the great Wagnerian performances of the decade...
...importance on the texts of his "dramatic cantatas" that he will permit none of them to be translated, although he himself seems intrigued by foreign idioms. When working on Oedipus, he decided to write the musical directions in Italian, the stage directions in Latin, e.g., the entrance of the two children is signaled by the line "Inducuntur Oedipodis liberi Antigone et Ismene...
Instead of cylinders and pistons, the Wankel engine has a single combustion chamber shaped like a fat-waisted figure eight (see diagram). Inside, it is a three-cornered rotor with curved sides. A shaft passes through the rotor and makes it move on an eccentric orbit by means of two gears. All three corners of the triangle stay in contact with the wall of the chamber at all times. To make the contacts gaslight, each corner is tipped with an inset metal strip that, as the drive shaft revolves, is pushed tight against the cavity's inner walls...
...decreases in volume, compressing the mixture. The engine's single spark plug fires; the exploding gas pushes the rotor and shaft. At the end of the power stroke, a corner of the rotor uncovers the exhaust port, and the burned gases are swept out of the engine. Meanwhile, two other cavities have been formed and are passing through the same cycle. Maximum shaft speed is 17,000 r.p.m., but the rotor turns over only one-third as fast...
...metal strips show no wear after 300 hours of fullspeed operation. The engine uses a conventional carburetor and can be made to burn many kinds of fuel, including diesel oil. It is not for sale yet, but NSU expects to have it debugged and in large production in about two years...