Constructed from bamboo with its flying surfaces covered in canvas like his first aeroplane, Watson's No.2 was structurally similar to its predecessor, which lends credence to the fact that Watson's first rocking wing aircraft did not fly. The two aircraft shared the same dimensions, wing plan and box kite tail surfaces, although the "A" frame centre section of the No.2 differed slightly from the No.1 in bracing details. Watson's new aeroplane was powered by a 1910 three cylinder 30 hp Humber engine.