Buckminster Fuller (1895–1983) was an American architect and inventor. Experimenting with sleep reduction, the scientist created a sleep schedule named Dymaxion. Sticking to the schedule, Fuller took a nap every time his primary energy evaporated, at the first sign of fatigue. These intervals came about every six hours, and the length of naps was 30 minutes.
The experiment lasted 2 years. The reported result: “The most vigorous and alert condition I have ever enjoyed”. Eventually Fuller had to quit because the schedule conflicted with his business associates, who insisted on sleeping like other men.