The Vultee BT-13 Valiant was an American World War II-era basic trainer aircraft built by Vultee Aircraft for the United States Army Air Corps, and later US Army Air Forces. A subsequent variant of the BT-13 in USAAC/USAAF service was known as the BT-15 Valiant, while an identical version for the US Navy was known as the SNV and was used to train naval aviators for the US Navy, US Marine Corps and US Coast Guard.
The Vultee BT-13 was the basic trainer flown by most American pilots during World War II. It was the second phase of the three phase training program for pilots. After primary training, the student pilot moved to the more complex Vultee for basic flight training. The BT-13 had a more powerful engine and was faster and heavier than the primary trainer. It required the student pilot to use two way radio communications with the ground and to operate landing flaps and a two-position Hamilton Standard variable pitch propeller. It did not, however, have retractable landing gear nor a hydraulic system. The large flaps are operated by a crank-and-cable system. Its pilots nicknamed it the "Vultee Vibrator."