The ground tests involved a Rolls-Royce M250 gas turbine operating in series-hybrid configuration, where the engine operates as a turbo-generator that charges an on-board battery system; as a parallel hybrid, where the aircraft's thrust is supplied by a combination of the engine and the electrical system; and in a turbo-electric
mode, where the engine operates as a pure turbo-generator supplying electric power for thrust and other power needs on the aircraft.
Nasa, meanwhile, is combining the blended wing design with turbo-electric
propulsion -- a particular form of hybrid-electric propulsion.
The ground tests involved a Rolls-Royce M250 gas turbine - a highly successful engine that has powered more than 170 varieties of fixed-wing military, civilian aircraft and helicopters since its introduction - operating in series hybrid configuration, where the engine operates as a turbo-generator that charges an on-board battery system; parallel hybrid where the aircraft's thrust is supplied by a combination of the engine and the electrical system and turbo-electric
mode where the engine operates as a pure turbo-generator supplying electric power for thrust and any other power needs on the aircraft.
A more intriguing possibility is the all-electric, hybrid-electric and turbo-electric
engines being developed for flying cars such as the E-volo.
In 1937 the Blue Riband was presented to the ship's main French rival, the SS Normandie owned by Compagnie Generale Transatlantique, with its powerful steam turbo-electric
The majestic vessel was 579 ft long and featured turbo-electric
engines driving four propellers.
He was already credited with commercializing steam turbines for his company, and also turbo-electric
The superconductivity is an enabling technology for the more efficient turbo-electric
aircraft of the future.
He also offers interesting historical insight into internal competition for control over the design details of capital ships during different eras, with an informative analysis of the role of naval-industrial relations in the early debate over the adoption of turbo-electric
He was aboard a turbo-electric
tanker carrying high-octane gasoline in a convoy of ships that departed New York and sailed directly to Cherbourg, France.
However, basic and applied research on all-electric, turbo-electric
and hybrid power sources for aircraft is ongoing in civilian agencies such as NASA, the private sector and at least in one Defense Department program.
This wide-ranging work has considered future distributed propulsion systems including turbo-electric
. And it was this expertise that convinced Nasa to award the grant.