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2. Sypaq Corvo Precision Payload Delivery System - Wikipedia

   en.wikipedia.org/wiki/Sypaq_Corvo_Precision...

   The Corvo Precision Payload Delivery System (PPDS) is a small aerial drone originally intended for logistics, weighs 2.4 kg (5.3 lb) empty, and deliveries payloads of up to 3 kilograms (6.6 lb). [1] The airframe is made of waxed foamcore (foamboard) and the drone is supplied as a self-assembly flatpack, complete with a tablet-PC control centre ...

3. List of aircraft propeller manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_aircraft_propeller...

   Banks Maxwell Propeller Company - United States; Bellissimo Custom Propellers - Ontario, Canada [1] Binder Motorenbau - Germany; Baoding Propeller Plant - People's Republic of China; Blackburn Aeroplane & Motor Co - UK; Bolly Props - Australia; Born Propeller - Germany; British Maxim - UK; Büttner Propeller - Germany

4. Toroidal propeller - Wikipedia

   en.wikipedia.org/wiki/Toroidal_propeller

   A toroidal propeller is a type of propeller that is ring-shaped with each blade forming a closed loop. The propellers are significantly quieter at audible frequency ranges, between 20 Hz and 20 kHz, while generating comparable thrust to traditional propellers. In practice, toroidal propellers reduce noise pollution in both aviation and maritime ...

5. Zipline (drone delivery company) - Wikipedia

   en.wikipedia.org/wiki/Zipline_(drone_delivery...

   The drones have two propellers for redundancy and can fly safely on a single propeller or motor. A parachute that will bring the drone to the ground can be deployed if a larger set of faults occur. [51] If the drone crashes, the outer components are frangible, breaking to release energy [52] and impact the ground with less force. [53]

6. IAI Heron - Wikipedia

   en.wikipedia.org/wiki/IAI_Heron

   Data from Heron/Shoval/Eitan General characteristics Capacity: 250 kg (551 lb) Length: 8.5 m (27 ft 11 in) Wingspan: 16.6 m (54 ft 6 in) Airfoil: IAI SA-21 Max takeoff weight: 1,150 kg (2,535 lb) Powerplant: 1 × Rotax 916 4-cylinder air and water cooled horizontally-opposed piston engine, 160 kW (210 hp) Propellers: 3-bladed pusher propeller Performance Maximum speed: 207 km/h (129 mph, 112 ...

7. Wing (company) - Wikipedia

   en.wikipedia.org/wiki/Wing_(company)

   The drones are specifically designed for small parcel delivery. Each aircraft has horizontally-oriented propellers like a classic multirotor drone, along with a fixed-wing to help it cover long distances quickly The aircraft takes off vertically and then enters a forward-flight phase. Its motors are powered by electric batteries. [11]

8. Quadcopter - Wikipedia

   en.wikipedia.org/wiki/Quadcopter

   Among the designs he tried was the Oehmichen No. 2, which employed four two-blade rotors and eight propellers, all driven by a single engine. The angle of the rotor blades could be varied by warping. Five of the propellers, spinning in the horizontal plane, stabilized the machine laterally. Another propeller was mounted at the nose for steering.

9. Propeller (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Propeller_(aeronautics)

   A 6-bladed Hamilton Standard 568F propeller on an ATR 72 short-haul airliner. Lowry [27] quotes a propeller efficiency of about 73.5% at cruise for a Cessna 172.This is derived from his "Bootstrap approach" for analyzing the performance of light general aviation aircraft using fixed pitch or constant speed propellers.