One such convertible was the Parnall Pixie III, designed to compete at the Lympne light aircraft trials; another was the Clarke Cheetah.
[1] This aircraft was in 1928 transformed into a parasol monoplane (the Halton Minus) and so there was a set of short and narrow chord wings spare.
[3] When rigged as a monoplane, the Cheetah had a pair of parallel lift struts on each side from the lower fuselage longeron to the two wing spars not far outboard.
Power came from a 35 hp (26 kW) Blackburne Thrush three cylinder radial, mounted in the inverted-Y orientation and driving a two-bladed propeller.
[1] In 1935 it was briefly owned by F.G.Miles and whilst in his care observers noted the difficulty the little engine had in moving the aircraft over bumpy ground.