The Blériot-SPAD S.41 was a French fighter aircraft developed in the early 1920s.
The S.41 was a refinement of the S.XX and was a single-seat fighter biplane which had a monocoque fuselage made of wood.
The wings, on the other hand, were made of wood and metal.
[1] In 1924, the S.41 was converted to a racer and redesignated S.41bis.
Data from [2]General characteristics Performance Armament