As well as piloting for A.V. Roe and Martinsyde amongst others, he flew alongside early British flyers like Tommy Sopwith, Harry Hawker, Gordon Bell and Ronald Kemp.
In August 1913 Kauper, accompanied Harry Hawker, by then qualified as a pilot, as his mechanic in the £5000 Daily Mail Circuit of Britain race.
Harry Hawker, record-breaking Brooklands-based test pilot and racing driver lived in Hook Road until his death in a flying accident at Hendon Aerodrome and is buried in St Paul's churchyard.
In 1915, Sopwith produced a personal aircraft for the company's test pilot Harry Hawker, a single-seat, tractor biplane powered by a 50 hp Gnome rotary engine.
The prototype was powered by an 80 hp (60 kW) Gnome Lambda rotary engine and in a trial flown by Harry Hawker at Farnborough the Tabloid reached 92 mph (148 km/h) and took only one minute to reach 1200 ft (366 m) while carrying a passenger and enough fuel for 2½ hours.
The prototype Triplane, serial N500, first flew on 28 May 1916, with Sopwith test pilot Harry Hawker at the controls.
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