Pronunciation: [kwˈe͡ɪf] (IPA) 
The word "quaife", pronounced /kweɪf/, refers to a type of gearbox used in high-performance automobiles. The spelling of the word follows English pronunciation rules, with the "qu" representing the sound /kw/ and the "ai" representing the long vowel sound /eɪ/. The final "e" is silent, as is common in many English words. While the spelling may seem unusual, it accurately represents the sounds of the word when spoken aloud.
Quaife is primarily defined as a manual transmission type, often referred to as a limited-slip differential (LSD), that is specifically designed to enhance the performance and handling capabilities of cars, motorcycles, and other vehicles. This term is derived from the name of its inventor, Rodney Quaife, who patented this innovative mechanism in 1965.
A Quaife differential is engineered to distribute the power of the engine more efficiently to the wheels, particularly when driving on slippery or uneven surfaces. Its key feature is the ability to transmit torque effectively to both drive wheels while allowing them to rotate at different speeds. This function significantly enhances traction, stability, and control of the vehicle, especially during cornering or quick acceleration. By reducing wheel spin and maintaining better contact with the road surface, Quaife differentials result in improved efficiency and better racing performance.
The Quaife differential achieves this by utilizing a series of gears and clutches, which engage automatically and redirect the torque to the wheel with the most grip. Unlike an open differential, where power is primarily sent to the wheel with the least resistance, the Quaife differential transfers power to both wheels even if one loses traction. This feature ensures that power is consistently delivered to the wheel with grip, providing better stability and grip in challenging driving conditions.
In summary, a Quaife differential is a specialized type of manual transmission, designed to improve the performance and handling of vehicles by distributing torque efficiently between the drive wheels, resulting in enhanced traction, stability, and control.
The word "quaife" is of English origin. It is derived from the Middle English word "quave", which means "to tremble" or "to shake". Over time, the term "quaife" specifically came to refer to a shallow, broad-rimmed drinking cup or bowl that would often tremble or shake due to its design. The word has its roots in Old English and can be traced back to the Proto-Germanic word "kwabōną", which means "to shake" or "quiver".
