How hard would it be to replace the pilot in the Solar Impulse with cameras and a remote control system?
http://en.wikipedia.org/wiki/Solar_Impulse
General characteristics
Crew: 1
Length: 21.85 m (71.7 ft)
Wingspan: 63.4 m (208 ft)
Height: 6.40 m (21.0 ft)
Wing area: 11,628 photovoltaic cells rated at 45 kW peak: 200 m2 (2,200 sq ft)
Aspect ratio: 19.7
Loaded weight: 1,600 kg (3,500 lb)
Max. takeoff weight: 2,000 kg (4,400 lb)
Powerplant: 4 × electric motors, 4 x 21 kWh lithium-ion batteries (450 kg), providing 7.5 kW (10 HP) each
Propeller diameter: 3.5 m at 200 to 400 rpm (11 ft)
Take-off speed: 35 kilometres per hour (22 mph)
Performance
Cruise speed: 70 kilometres per hour (43 mph)
Endurance: 36 hours (projected)
Service ceiling: 8,500 m (27,900 ft) with a maximum altitude of 12,000 metres (39,000 ft)