Future Transportation Systems - Decreasing Fuel Consumption and Exhaust Gas Emissions in Transportation - page 277

Fig. 17.9 Large cargo airplane designed as an oversized glider

supplies power to the engine for 1.5-2.0 h. The price is about €100,000, i.e., US
$143,000.
The development of an all-electric airplane with fuel cell technology has high
potential for saving fuel while cruising in the very far future.

17.2.2.6 Glider with Hydrogen Fuel Cell

The fuel cell powered experimental airplanes has two additional outer tanks under
the wings for the hydrogen powered fuel Antares DLR-H2 cell and for the com-
pressed gas. It is an unmanned airplane with hydrogen fuel cells which produces
25 kW (34 HP), i.e., 23.7 BTU s -1 [ 42 ].
The small airplane is able to fly 750 km (466 mi) in 5 h at a speed of
170 km h -1 (91.8 nmi h -1 ); see Fig. 17.11 .
In the future, fuel cells may become more important in specific sectors of
aviation, depending on their efficiency.

17.2.2.7 Solar Cell-Powered Airplane

Solar airplanes are equipped with solar cells. They are still able to fly around the
world. The fuselage is 20-22 m (65.6-72.1 ft) long; the wing is 63.0-63.4 m