built in the summer 1912 g. plane "Gakkel-IX» became, essentially, the first in Russia braced monoplane. This scheme originated with the aim of creating the best view upwards and outwards. "Gakkel-IX» as, as "Hackel-VIII», It was built for the competition of military aircraft, scheduled for autumn 1912 g. in Petrograd.
In the development of this two-seater car designer YA.M. Hackel has used a number of original innovations. wing struts, eg, They were made of "reinforced wood", on the surface of the streamlined strut made grooves, which are stacked in a steel wire. The main struts converge to the lower boar behind the wheels of the chassis, With runners and three wheels on a common axis. Scalloped rear edge rudders and ailerons of the wing forms made so ptitsevidnoy, to be able to increase their area if necessary, tightening the web spaces between the ribs, or decrease, cut them. For an overview of down at the sides of the fuselage and wing trailing edge holes were made.
In precontest summer flights 1912 g. plane shown itself well. In July, the pilot GV. Alekhnovich committed to monoplane in Gatchina some successful flights with the passenger. Monoplane 'Gakkel-IX »with biplane' Gakkel-VIII» took part in the competition of military aircraft in the fall 1912 g. Constant problems with the engine was not allowed to conduct all flights, under the program. The reason became clear only after many years. Aircraft Mechanic YA.M. Hackel, bribed a pilot plant to compete, "Duque" AM. Haber-Volyn, sulfuric acid was poured in the engine jacket, than I deduced it down. The first two prizes worth 25 and 15 thousand. rubles earned I.I aircraft design. Sikorski. 5 December 1912 g. in Design workshop at the Commandant's airfield from "unexplained reasons" there was a fire, plane "Gakkel-IX», along with other new-biplane plane "Gakkel-VIII» were destroyed by fire. prizes YA.M. Gakkel did not get in the competition, and funds for the restoration workshop and a self-built aircraft he was no longer. Attempts to obtain them from the military establishment and success of Russian capitalists had.
finding financial support is not, Hackel was forced to stop active in aviation, although his "first love" never forgot. AT 1914 g. YA.M. Hackel again submitted two projects to the contest seaplanes, declared Marine Technology Department. Correspondence and negotiations were, that, Unfortunately, does not end. AT 1922 g. He presented a draft of a large passenger plane, but the project could not be realized under the conditions of general chaos. AT 1923 g. he has developed educational and sports plane "Gakkel-X1", and 1924 g. glider - "The Fly". the, that he was not able to bring their aircraft to perfection, shows, Such complex machines it is impossible to design and build even more alone, without the support of the industrial enterprises.
YA.M. Hackel has achieved great results in other areas of mechanical engineering, in particular, in the creation of the first in the Soviet Union and one of the world's first high-power locomotives. is he, author 26 patented inventions, Honored Worker of Science and Technology, Professor, He continued in the moments of rest "for the soul to draw pictures" of various aircraft. In a letter to MV. Vodopyanov in 1938 g. He wrote: "Finished his course of life and the summing up to the 40th anniversary of my engineering, I am most sorry, that threw the aircraft ". died YA.M. Hackel 12 December 1945 g.
Performance characteristics Gakkel-9 aircraft
Crew, people……………………2
Engine……………………AP x 1, "Argus" 88
Power, HP…………………….88
Wingspan, m / wing area, m2……………………11,0/n / d
Length of the plane / Aircraft height, m……………………8,2/n / d
