A Közlekedési Múzeum Évkönyve 11. 1996-1998 (1999)

IV. RÉSZ 407 - Előzetes közlemények és rövid tartalmi összefoglaló a Közlekedési Múzeum XI. Évkönyvéhez (magyar, angol, német nyelven) 429

Author illustrates this long process of development, the more important phases of the Diesel engine development and production in Hungary and the evolution of application of engines for road and railway vehicles and ships. Attila Szabó: "The Technical Development Of Gas Turbine Aircraft Drives And Aircrafts." In the introduction of his paper the Author demonstrates the long way covered by the designing and production of aircrafts driven by piston engine and propeller, from the first flight of the Wright-brothers (lasting 12 seconds and the distance of flight was 36 m) till the appearance of the gas turbine drives. From the chapter describing the brief technical history of the predecessors of the gas turbine drive the reader can learn about the evolution of turbines going back several centuries. The first gas turbine suitable for operation was built in 1906 in France. This turbine could run continuously, but because its large weight it was not possible to apply it for driving aircrafts. The first gas turbine suitable for driving vehicles was designed by the Frenchman M. Guillaume in 1921. The first gas turbine driven aircraft took off on the 20th Juny 1939. Its drive was designed by J. Pabst von Ohain. In the further part of the paper the Author introduces the bestknown designers, among them the Hungarian pioneers, as Aladár Zsélyi, Albert Fonó and György Jendrassik. In the further part of the paper the tests carried out all over the world with the gas turbine drives and in the technical respect most significant types of gas turbine driven civil and military aircrafts are introduced. The closing part of the paper makes the reader acquainted with the civil and military aircrafts being in service in the Hungarian air traffic. László Szabó: "Chapters From The History Of The Construction Of Road Bridges In Hungary As Reflected By Documents Kept In The Transport Museum". The paper demonstrates the significance, establishment and constructional development of the river crossings from the Roman age till our days. The several thousand years' retrospection and the discussion of the river crossing possibilities in Hungary account for the bridge constructions in the later centuries. In the frame of this the Autor informs about the boat-bridges as constructional solutions and furthermore about the history of application and structural development of steel, concrete, reinforced concrete and stressed reinforced concrete engineering structures and bridges. The paper contains detailed descriptions about our more significant bridges constructed, or rebuilt by application of the structeres mentioned. Dr.László Eperjesi: "The International Relations Concerning Air Services Of Hungary Between 1920 and 1938". The paper written in a professional style affording good reading demonstrates the aeronautic situation of Hungary between the two world wars. The research of the first decade of the age discussed and the objectiv publication of the results point out to the aspirations of the political events of the periods before and after the signing the dictated peace of Trianon intending to hamper all aims and demands of Hungary concerning development. The series of regulations restricting the international and national air traffic of Hungary was a part of this conception. The second part of the paper demonstrates in chronological order the efforts of the government concerning the commencment and development of the international air traffic and the establishment of the air traffic agreements. The paper ends with the numerical demonstration of the achieved results. Dr.Balázs Mészáros: "Laws Concerning Shipping Enacted Between The Two World Wars In Hungary". The Author illustrates in his paper - through the laws enacted, their submitting and preamble - the successful activity exerted by the Hungarian government between the two world wars in interest of boosting the economy, the foreign trade, the Danube shipping and the establishment of the Danubeocean shipping of Hungary. The traffic politics of this period supported the water traffic and its infrastructure by significant investments (establishment of the Danube-ocean shipping, construction of the International free port, etc) contributing to the general economic boom. 441