The rotary engine began with an improbable dream in the summer of 1919 by a 17-yearold German boy named Felix Wankel. In his dream he went to a concert in his own handmade car, remembering the boasting in the dream, he bragged to his friends about his new type of engine, half-turbine and half-reciprocated. When he woke up the following morning he was convinced that the dream was a premonition of the birth of a new type of gasoline engine. At the time Wankel had no fundamental knowledge about internal combustion engines but he believed that the engine could achieve four cycles while rotating. Wankels intuition triggered the birth of