Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Benes-Mráz Bibi was a series of light aircraft manufactured in Czechoslovakia shortly before World War II. Based on the firm's Beta-Minor design of the previous year, they were lighter, smaller aircraft in which the seats were side-by-side instead of in tandem, and the cockpits fully enclosed, retaining the Beta-Minors cantilever low-wing cantilever monoplane layout, with fixed tailwheel undercarriage.