Douglas gained significant attention in 1932–1933 when Robert Edison Fulton, Jr. became the first known man to circumnavigate the globe on a 6 hp Douglas twin fitted with automobile tyres. Fulton went on to write a book on his adventure titled "One Man Caravan". Cyclecar A version of Joseph Barter's horizontal twin cylinder engine of 1070 cc capacity, water cooled, was fitted to a two-seat cyclecar in 1913. It was better equipped than the average cyclecar of the era featuring shaft drive from the front-mounted engine to the rear wheels and was sold for £200. The rear suspension was unusual with a horizontal coil spring mounted above the differential, the front used a beam axle and semi-elliptic leaf springing. Production was suspended during World War I and when the car re-appeared in 1919 the engine was enlarged to 1224 cc and the price had risen to £400 then to £500. This proved to be too expensive and sales dried up after a few hundred had been made. No original cars survive but a replica using some original parts has been made. Motorcycle racing Douglas had some success in motorcycle racing and trials events. Twelve Douglas motorcycles were entered in both the Junior TT and Senior TT, and another three were in the Sidecar race during the 1923 TT. This gave Douglas their first senior Isle of Man TT victories. However Douglas had previously won the Junior TT in 1912. Tom Sheard won the 500 cc Senior TT and they won the first ever Isle of Man Sidecar race with Freddie Dixon while Jim Whalley had the fastest lap in the Senior TT with a time of just under during a wet race. A Douglas also placed third in the Junior TT that year. Later in 1923 Jim Whalley won the French Grand Prix, a distance of , and another Douglas won the 1923 Durban-Johannesberg Marathon race; a remarkable achievement by Percy Flook on a 2.75 hp machine with an average for . 1923 also saw Jim Whalley win the Spanish 12-hour race and Alec Bennett won the 1923 Welsh TT race. The late twenties saw success in Austria (1929 Austrian TT was won by Rudolph Runtsch) Post war the factory had little road racing success however a Mark 3 did win an outstanding victory in the 1950 Bemsee 'Silverstone Saturday' beating all the Velocettes, Nortons and BSA Gold Stars Influence