The Rotary Aero Engine

Book excerpt: The rotary aero engine has always fascinated aviation historians and enthusiasts. When the 50hp Gnome appeared in 1908, it was the most powerful engine for its weight available and was used by almost all the notable pioneers to set records for height, speed and endurance. Rotaries also played a key role in the First World War, powering many of the famous 'fighting scouts' such as the Sopwith Camel and Fokker Monoplane. In this book, Andrew Nahum gives an original and well-argued explanation, showing that rotary development was limited by a 'power ceiling' which was a basic consequence of design.