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2. List of aircraft propeller manufacturers - Wikipedia

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

   Haw Propeller - Germany; Helices E-PROPS - Electravia - France (2008–present) Hélices Halter - France (1987-2014) Hamilton Standard - United States (1929-1999) Hamilton Sundstrand - United States (1999-2012) Hartzell Propeller - United States (1917–present) Hegy Propellers - United States; Heine Propellers - Germany; Helix-Carbon - Germany ...

3. Performance Propellers - Wikipedia

   en.wikipedia.org/wiki/Performance_Propellers

   Performance Propellers, officially Performance Propellers USA, LLC, is an American manufacturer of wooden propellers for homebuilt and ultralight aircraft. The company headquarters is located in Donie, Texas and was formerly in Patagonia, Arizona .

4. Ducted fan - Wikipedia

   en.wikipedia.org/wiki/Ducted_fan

   In aeronautics, a ducted fan is a thrust-generating mechanical fan or propeller mounted within a cylindrical duct or shroud. Other terms include ducted propeller or shrouded propeller. [1] When used in vertical takeoff and landing applications it is also known as a shrouded rotor. [2]

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. eVTOL - Wikipedia

   en.wikipedia.org/wiki/EVTOL

   Their drones are able to fly up to 100 km and carry up to 1.5 kg. [51] Amazon Prime Air and UPS are two others companies using drone delivery. [52] A German aerospace company called Wingcopter in collaboration with UNICEF has also delivered vaccines in Vanuatu in 2018. [53] In 2020 wingcopter eVTOL drone was used to deliver COVID-19 test kits ...

7. Windsor Propeller - Wikipedia

   en.wikipedia.org/wiki/Windsor_Propeller

   Windsor Propeller is an American manufacturer of propellers and accessories for hobby model aircraft and unmanned aerial vehicles (UAVs). Founded in 1978 in Windsor , Northern California by Fred Jamieson, the company is developing and manufacturing its products under the brand name Master Airscrew.

8. Variable-pitch propeller (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Variable-pitch_propeller...

   A constant-speed propeller is a variable-pitch propeller that automatically changes its blade pitch in order to maintain a chosen rotational speed, regardless of the operational conditions of the aircraft. This is achieved by use of a constant-speed unit (CSU) or propeller governor, which automatically changes the propeller's blade pitch.

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.