It was Costin Densham
Slip: It was Costin Densham who formed Wade Engineering. I remember his Calcott and 14/40 Sunbeam but skidded over his name. A reader tells me the Fiat AS-6 racing engine drove co-axial, not contrarotating props. To check my memory I consulted books by Bill Guriston, Setright, Sedgwick and Herschel Smith, who all say as I did, which makes me feel better!