Claim: Possum, designed by Harold Bolas and manufactured by George Parnall and Co., was an experimental bomber with a single, central engine driving wing-mounted propellers via shafts and gears first flew on June 19, 1923.
Evidence: The Parnall Possum was an experimental triplane, with a single, central engine driving wing-mounted propellers via shafts and gears. Experimental bomber George Parnall and Co. Harold Bolas 19 June 1923