What manufacturer was investigating the Wittman Big X and at one point was based in San Antonio, Texas?
Wittman Big X The Wittman Big X is a four seat high wing variant of the Wittman Buttercup. The aircraft received serious attention from both Fairchild Aircraft, and Cessna Aircraft in the post World War II aviation boom.
Andeavor Andeavor Corporation (), formerly known as Tesoro Corporation, or simply as Tesoro, is a Fortune 100 and a Fortune Global 500 company headquartered in Texas at San Antonio, with 2013 annual revenues of $37 billion, and over 13,000 employees worldwide.