Mahoney
 
Sorceress
 

The Beck-Mahoney Sorceress was a racing staggerwing biplane originally designed by the father and son team of Lee and Seldon Mahoney with later improvements accomplished by pilot Don Beck.

The aircraft is famous as being the first biplane to exceed 200 mph (320 km/h) on a race pylon course and also held the distinction of being the most successful racing biplane in history.  It was donated to the Smithsonian National Air and Space Museum after its last race, where it is currently housed in the Steven F. Udvar-Hazy Center in Chantilly, Virginia.

Source: Wikipedia