French aerospace agency ONERA has tested a tiny combustion chamber for use in a prototype micro gas turbine that could be built by 2010 for a miniature unmanned air vehicle.
Tested at ONERA's Laerte laboratory in Palaiseau, near Paris, the combustion chamber has a volume smaller than 10mm3 (0.39in3) and is intended for a micro-turbine that is 20mm (0.78in) in diameter by 20mm high. This will power a micro-UAV with up to a 20cm wingspan, says ONERA.
Air and fuel, either hydrogen or propane, are injected separately into the micro-turbine, which produces mechanical energy that is then converted into electricity. "The power required is between 50 and 100W [for] an expected UAV endurance of 30min," says ONERA.
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