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+--- Thread: Patent description for NASA's Helios high altitude aircraft (/showthread.php?tid=5)
Patent description for NASA's Helios high altitude aircraft - Tefkros1 - 19-03-2014 04:57 PM
Here is the (now luckily expired) patent description for NASA's Helios High Altitude aircraft, it can provide valuable insight especially on high altitude propeller control and power supply.
NASA Helios