Helios can reach the height of almost 30,000 meters; such aircraft could supplement communication satellites.
Wing span: 75.3 m,
Mass: 600 kg - unloaded plane,
Cargo: up to 330 kg depends on measurement equipment weight.
Propulsion: 14 DC brush less electric motors (the power of each motor is 1,5 kW) with two blades, specially designed for high altitude flights. The weight of each motor is less than 5 kg. Length of both propeller blades is 1.7 m.
Speed: Typical flight speed is 30 to 40 km/h. The highest speed is 270 km/h.
Flight: The anticipated autonomy in the future together with fuel cells will reach for uninterrupted flights (several months of autonomy).
Materials: All main parts of the plane are made of carbon fibers and Styrofoam. Wings are covered with special designed and produced plastic sheet.
The Zephyr is an ultra light aircraft made of carbon fiber. Though it has a 60-foot (18-meter) wingspan, it weighs just 66 pounds (30 kilograms) and is launched by hand.
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