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One of four 6-bladed Dowty Rotol R391 composite controllable- and reversible-pitch propellers on the Lockheed Martin C-130J Super Hercules. The company was formed as Rotol Airscrews in 1937 by Rolls-Royce and Bristol Engines to take over both companies' propeller development, [1] the market being too small to support more than one company.
Dowty Rotol R391 six-blade composite controllable- and reversible-pitch propeller of a C-130J Super Hercules. In aeronautics, a variable-pitch propeller is a type of propeller (airscrew) with blades that can be rotated around their long axis to change the blade pitch.
To maintain speed, the engines were upgraded to four 3,800 shaft horsepower (2,834 kW) models, which were fitted with four 21 ft (6.4 m) diameter steerable Dowty Rotol propellers. The work cost around £5 million for each craft, and they were designated Mark IIIs; the improvements allowed them to operate in seas up to 11 ft 6 in (3.5 m) high ...
The SR.N6 was powered by a single marinised model of the Bristol Gnome turboshaft engine; this drove both a single rear-facing 9 ft (2.74 m) diameter 4-bladed Dowty Rotol variable-pitch propeller along with a 7 ft (2.13 m) diameter centrifugal lift fan. [10]
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 ...
Propellers: 4-bladed Dowty Rotol constant-speed fully-feathering propellers, 12 ft 0 in (3.66 m) diameter Performance Cruise speed: 244 kn (281 mph, 452 km/h)
The rotor is four-bladed Dowty Rotol R334/4-82-F/13 constant speed propeller with a 2.75 m (110-inch) diameter. [24] Philippines Air Force's NC-212i. On 3 November 2022, Indonesian Aerospace and MT Propeller signed the General Purchase Agreement (GPA) for the Procurement of MTV-27 Propellers for the NC-212i Aircraft. [25]
The original Rolls-Royce Dart turboprop engines that had powered various marks of the F27, which had broadly provided between 1,268 and 1715 kW (1,700-2,300 hp), were replaced by a pair of more fuel efficient Pratt & Whitney Canada PW124 powerplants, each capable of generating 1,864 kW (2,500 hp), which drove sets of six-bladed Dowty Rotol ...
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