from March 1917, during World War I, and rapidly became standard equipment, replacing a variety of mechanical gears.

It continued to be used by the Royal Air Force until World War II – the Gloster Gladiator being the last British fighter to be equipped with "CC" gear.

[6] He also devised a hydraulic system (patent GB133719) for operating both the valves and the fuel injectors for diesel engines.

The latter ran on normal flanged steel wheels but the drive used a road vehicle powertrain with rubber tyres pressed against the rails.

Research on a sonic asynchronous motor for vehicle applications (based on Constantinescu's work) has been done at the Transilvania University of Brașov.

[10] He died at Oxen House, beside Coniston Water on 11/12 December 1965,[11] and is buried in the churchyard at Lowick, Cumbria.

[12] The Dimitrie Leonida Technical Museum in Bucharest has exhibits relating to George Constantinescu.