The Pilatus B4 is an all-metal intermediate sailplane built by Pilatus Aircraft of Switzerland. The design of this glider originated in the 1960s, when the company Firma Rheintalwerke G. Basten (from which the "B" in the original designation is derived) manufactured the first two prototypes.

The Pilatus B4 is an all-metal intermediate sailplane built by Pilatus Aircraft of Switzerland. The design of this glider originated in the 1960s, when the company Firma Rheintalwerke G. Basten (from which the "B" in the original designation is derived) manufactured the first two prototypes.