Junkers J 1
The Junkers J 1 was the first distortion- free ( cantilever ) airworthy all-metal aircraft. When designed as a single-seat mid-wing design Hugo Junkers turned for the first time on the concepts that he had set out in 1910 in his so-called Nurflügelpatent.
History
It succeeded Hugo Junkers and his staff of 15 employees and despite the then incomplete welding technology on December 12, 1915 after only 3 months of construction to bring this revolutionary new concept to the first flight. On landing, the aircraft was corrupted. After the repair, three more test flights were carried out in January 1916 yet. The flights showed the practical feasibility and airworthiness of the all-metal concept and after that the J 1 was a relatively fast machine. With the relatively weak engine but the climb was not acceptable due to the heavy weight.
The only copy in 1926 handed over to the German Museum in Munich, where it was destroyed in 1944 by one of the air raids on Munich.
Construction
The planked with 0.1-0.2 mm thick sheet steel aircraft was too heavy ( 937 kg unladen weight, compared with 400 kg for the Fokker E -III) and therefore the inspection of the Air Force also gave no works contract. However, we placed an order for another attempt an improved design that led to the Junkers J 2.
A further realized in the J 1 innovation was the Junkers patented nozzle cooler which used the thermal energy of the cooling water in order to gain extra boost.