Concrete bridge in Carol Park, Bucharest, designed by G. Constantinescu and dedicated in 1906. It was the first concrete bridge with straight beams in Romania.
Born in Craiova in "the Doctor's House" near the Mihai Bravu Gardens, Constantinescu was influenced by his father George, born in 1844 (a professor of mathematics and engineering science, specialized in mathematics at the Sorbonne University).[1] Gogu Constantinescu settled in the United Kingdom in 1912. He was an honorary member of the Romanian Academy.
Family
He married Alexandra (Sandra) Cocorescu in Richmond, London, in December 1914. The couple moved to Wembley and, after their son Ian was born, they moved to Weybridge.[2] The marriage broke down in the 1920s and ended in divorce. He then married Eva Litton and the couple moved to Oxen House, beside Lake Coniston. Eva had two children, Richard and Michael, by a previous marriage.[3]
In 1918, he published the book A treatise on transmission of power by vibrations[4] in which he described his theory of sonics. The theory is applicable to various systems of power transmission but has mostly been applied to hydraulic systems. Sonics differs from hydrostatics, being based on waves, rather than pressure, in the liquid. Constantinescu argued that, contrary to popular belief, liquids are compressible.[5] Transmission of power by waves in a liquid (e.g. water or oil) required a generator to produce the waves and a motor to use the waves to do work, either by percussion (as in rock drills) or by conversion to rotary motion.[2]
Internal combustion engines
He had several patents for improvements to carburetors, for example US1206512.[6] He also devised a hydraulic system (patent GB133719) for operating both the valves and the fuel injectors for diesel engines.[7]
Torque converter
Constantinesco automobile advertisement
He invented a mechanical torque converter actuated by a pendulum.[8] This was applied to the Constantinesco, a French-manufactured car. It was also tried on rail vehicles. A 250 hp petrol engined locomotive with a Constantinescu torque converter was exhibited at the 1924 Wembley Exhibition. The system was not
adopted on British railways but it was applied to some railcars on the Romanian State Railways.[3]
One of the two Lainici bridges designed by Constantinescu
Other
Other inventions included a "railway motor wagon". The latter ran on normal flanged steel wheels but the drive used a road vehicle powertrain with rubber tyres pressed against the rails. This is similar to the system used on many modern road-rail vehicles.[9] He also designed the Grand Mosque of Constanța (a project completed by the architect Victor Ştefănescu, then known as the Carol I Mosque).
Recent developments
Research on a sonic asynchronous motor for vehicle applications (based on Constantinescu's work) has been done at the Transilvania University of Brașov. The date of the paper is believed to be 5 October 2010.[10]
