The Dragon Fly 333 is an ultralight utility helicopter developed by archaeologists and filmmakers Angelo and Alfredo Castiglioni in the 1990s. French UAV manufacturer CAC Systèmes created a drone version named the Héliot for use in reconnaissance and as an aerial target, but the aircraft did not enter production.

DF Helicopters was acquired in 2010 by a Swiss Group, Avio International Group.

• Dragon Fly 333 - initial version
• Dragon Fly 333 AC - RAI-VLR certified version
• CAC Systèmes Héliot - drone version
• Dragon Fly 333 ULR - ultralight version ^[1]

–==Specifications (333)==

Data from Jane's All the World's Aircraft 1999--.00

General characteristics

• Crew: One pilot
• Capacity: One passenger
• Length: 7.86 m (25 ft 10 in)
• Height: 2.36 m (7 ft 9 in)
• Wing area: 35.2 m² (379 sq ft)
• Empty weight: 260 kg (573 lb)
• Gross weight: 500 kg (1,100 lb)
• Powerplant: 1 × Hirth F30A26AK , 82 kW (110 hp)
• Main rotor diameter: 6.70 m (22 ft 0 in)
• Main rotor area: 36.5 m² (393 sq ft)

Performance

• Maximum speed: 135 km/h (83 mph, 72 kn)
• Cruise speed: 130 km/h (70 mph, 61 kn)
• Range: 310 km (190 mi, 170 nmi)
• Service ceiling: 3,100 m (10,000 ft)
• Rate of climb: 6.5 m/s (1,280 ft/min)

• Jane's All the World's Aircraft 2004-05. London: Jane's Information Group.
• Simpson, R. W. (1998). Airlife's Helicopters and Rotorcraft. Ramsbury: Airlife Publishing. p. 216.
• Aviazione Sportiva (108). March 2008. {{cite journal}}: Missing or empty |title= (help)

• Manufacturer's website Archived 2020-09-25 at the Wayback Machine