
Boeing Hydrogen Fuel Cell Lithium Ion Battery Powered Manned Airplane Boeing Photo
In March, 2007 Boeing announced that in an effort to develop environmentally progressive technologies for aerospace applications, they along with researchers and industry partners throughout Europe planned to conduct experimental flight tests of a manned airplane powered only by a fuel cell and lightweight batteries.
Later the same year students at Georgia Institute of Technology in Atlanta, Georgia tested a scale model hydrogen powered unmanned aircraft. The proton exchange membrane (PEM) fuel cell using compressed hydrogen, powered the aircraft to an altitude of 25 meters, followed down an automotive track by a chase car at the Atlanta Dragway in Commerce, Georgia.

First Hydrogen Powered Manned Flight April 3, 2008 Boeing Photo
On April 3, 2008 Boeing announced the first hydrogen-powered manned flight in aviation history, see photo above. The propeller driven, single-seat plane climbed to 3,300 feet over Madrid, Spain, using only electricity. According to Boeing researchers, PEM fuel cell technology potentially could power small manned and unmanned air vehicles. Over the longer term, solid oxide fuel cells could be applied to secondary power-generating systems, such as auxiliary power units for large commercial airplanes.
A fuel cell is an electrochemical device that converts hydrogen directly into electricity and heat with none of the products of combustion such as carbon dioxide. Other than heat, water is its only exhaust.
A two-seat Dimona motor-glider with a 16.3 meter (53.5 foot) wingspan was used as the airframe. Built by Diamond Aircraft Industries of Austria, it was modified by BR&TE to include a Proton Exchange Membrane (PEM) fuel cell/lithium-ion battery hybrid system to power an electric motor coupled to a conventional propeller.
[via] www.us-tech.com/RelId/660275/ISvars/default/October_07_-_Fuel_Cells_Power_.htm