Question

why are front edge of airfoil(s) not as sharp as the trailing edge?​

Answer 1

Answer:

Re: Why do the leading edges of aerofoils need to be rounded

modern control surface aerodynamic design does not taper the trailing edge to a sharp point, but instead truncates the shape in a sharp edged flat that is a small % of the wing chord. this flat keeps the trailing edge separation at those sharp corners.