An obvious feature in photographs is the way that the wing roots tapered so as to reduce in thickness, designed to increase lateral control at low speeds.

[4] The aircraft showed promise and high speed but had problems with fuel supply when banking, which led to engine cut-outs.

For such a risky business as low-altitude air-racing, this was an unacceptable risk and the aircraft were withdrawn from competition in the 1929 Schneider Trophy, leaving the way clear for the Supermarine S.6 to win.

[5] An alternative theory for the withdrawal is rumoured to have been an accident to the lorry delivering the engines from Napier and insufficient time to repair the damage until the day after.

[2] This record was held only briefly, as a later run by Squadron Leader Augustus Orlebar in the S.6 managed to raise it over 350 mph.