Henry Ford family sole ownership of the company. By the mid-1920s, sales of the Model T began to decline due to rising competition. Other auto makers offered payment plans through which consumers could buy their cars, which usually included more modern mechanical features and styling not available with the Model T. Despite urgings from Edsel, Henry refused to incorporate new features into the Model T or to form a customer credit plan. By 1926, flagging sales of the Model T finally convinced Ford to make a new model. He pursued the project with a great deal of technical expertise in design of
Ford Piquette Avenue Plant of cars in the United States. Much of the design and experimental work for the new car was done by Henry Ford, draftsman Joseph Galamb, engineer Childe Harold Wills, and machinist C.J. Smith. Vanadium steel, an alloy lighter and stronger than standard steel, which was first used sparingly with the Ford Model N, R, and S, was used extensively with the Model T. The company revealed the plans for the Model T to its dealers on March 19, 1908. During July 1908, a few months before the Model T's introduction, a group of Piquette Avenue Plant employees experimented with the