In other countries subsidies helped to kick-start demand, but Britain's system of conversion grants was badly run, and eventually fell foul of European state-aid rules.
But for a solar eternal plane to be exactly that it needs an efficient energy harvesting, conversion and storage system that will work when the Sun has set.
BBC: NEWS | Science/Nature | 'Eternal planes' to watch over us
's one-year warranty on the base system is voided by the conversion and replaced with the Modbook Pro Protection Plan, which covers the entire hardware solution, including the base system.
ENGADGET: Modbook Pro to launch with SSD storage, up for pre-order October 3rd
This conversion process creates a complex system of multiple components held to tight tolerances making manufacturing more challenging.
In a statement Monday, United said the system migration was the single largest technology conversion in aviation history.
Though Symbian's certainly not getting as much share of the mobile discussion these days as some of its smaller competitors, it's certainly important to keep in mind that these guys have software deployed on literally hundreds of millions of devices, making this perhaps the largest-scale conversion of a closed operating system to open source in history.
ENGADGET: Symbian Foundation talks about its move to open source
Panasonic's artificial photosysnthesis system has a simple structure with highly efficient CO2 conversion, which can utilize direct sunlight or focused light.
One of their most valuable tools was a process called "geocoding, " the conversion of street addresses into global positioning system (GPS) coordinates.
The process, which will eventually affect all TV viewers in the UK, involves the conversion of the country's terrestrial television system to digital.
Between the improved conversion efficiencies, manufacturing gains, decreased inverter costs and improvements in other balance of system (BOS) costs, there is still room for substantial price improvement.
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Opponents of the method, however, are saying that the conversion process uses great amounts of fossil fuels and that it harms marine life through its vast duct system whereby it pipes water into the desalination facilities.
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