This paper presents a nonlinear fault-tolerant control (FTC) and sensor fault diagnosis for longitudinal dynamics of hypersonic flight vehicle. A nominal sliding mode control is developed to track the reference command of velocity and altitude on the basis of an affine nonlinear dynamic model. A nonlinear adaptive observer is proposed to estimate the fault in velocity system. https://www.roneverhart.com/1915-Old-Taylor-Bourbon-Bottled-1933-Prohibition-Bottling-Quart-low-fill/