The Deperdussin TT was a French racing aircraft built by the Société Pour les Appareils Deperdussin (SPAD) in the early 20th century. The aircraft was designed and built specifically for racing, and it was one of the fastest aircraft of its time.

The TT had a wooden frame covered in fabric and was powered by a 100 horsepower Gnome rotary engine. It had a wingspan of 6.5 meters and a length of 6.7 meters. The aircraft was designed for speed and maneuverability and had a top speed of around 160 kilometers per hour.

The Deperdussin TT was highly successful in racing competitions, and it set several world speed and altitude records during its career. The aircraft was particularly successful in the 1912 Circuit of Europe race, where it took first place and set a new world speed record.

Despite its success, the TT was not designed for military use, and it saw limited service during World War I. After the war, the TT continued to serve as a racing aircraft, and it was also used for record-breaking flights.

The Deperdussin TT’s success helped establish the SPAD as one of the leading aircraft manufacturers in the world, and it contributed to the rapid development of aviation technology during this period. The TT was also influential in the development of aircraft design, and it served as a template for many future racing and high-performance aircraft designs.