Pescara Model 3 Helicopter

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Pescara Model 3 Helicopter

From Wikipedia, the free encyclopedia

Model 3

Model 2 and Model 3
Role	Helicopter Type of aircraft
National origin	France
Designer	Raúl Pateras Pescara
Introduction	1923
Number built	1

The Pescara Model 3 was the first of several coaxial helicopter designs by Raúl Pateras Pescara to demonstrate sustained controlled helicopter flight.

Development

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Argentinian engineer Pescara started helicopter development in 1916. Alberto Santos-Dumont helped fund experimentation on designs in France. Multiple examples were built, demonstrated, crashed, improved and rebuilt owing to conflicting and different names for the various versions.^[1] Anticipating success with the counter-rotating mechanism, Pescara patented a design with a streamlined fuselage with one set of rotors above, and one below the fuselage.^[2]

The model three was the first example to use control mechanisms as modern helicopters. The helicopter is based around a central shaft with counter-rotating rotors. Each rotor was doubled into a biplane arrangement with cable supports.^[3] It used a cyclic stick for forward and lateral control with rotor warping, and wheel for yaw anti-torque control.^[4] The main rotor shaft was able to tilt slightly for forward control.^[5] The rotors were also capable of autorotation in case of engine failure.^[6]

Operational history

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In September 1923, a 1 km flight attempt was nearly completed, before the vehicle crashed. On 24 March 1924 Étienne Oehmichen set a world helicopter record flight of 358m. On 18 April 1924 the model 2F bested the record and flew 736m at 8 mph to set a record in sustained vertical flight.^[7]

Variants

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Pescara Model 1: 1919 - 45 hp (34 kW) Hispano automobile engine, later 170 hp (130 kW) Le Rhône Type 9R rotary
Pescara Model 2: 45 hp (34 kW) Hispano automobile engine, Six pairs of Biplane blades
Pescara Model 2F: Rear mounted radiator replaced with tail surface.
Pescara Model 3: Four pair of conter-rotating biplane blades - 180 hp (130 kW) Hispano-Suiza 8

Pescara Model 4S: 1931-Final British commissioned model featuring a radial engine with a small cooling propeller, and football shaped landing outriggers.^[8]

Specifications (Model 3)

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Data from Air Progress

General characteristics

Crew: 1
Powerplant: 1 × Hispano-Suiza 8 V-8 piston engine, 130 kW (180 hp)
Main rotor diameter: 16 × 7.2 m (23 ft 7 in)

Performance

Maximum speed: 13 km/h (8.0 mph, 7.0 kn)
Range: 0.736 km (0.457 mi, 0.397 nmi) Demonstrated range

References

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^ James R. Chiles. The God Machine: From Boomerangs to Black Hawks: The Story of the Helicopter. p. 70.
^ "Patent US1527701A". Retrieved 21 October 2013.
^ J. Gordon Leishman. Principles of Helicopter Aerodynamics. p. 17.
^ Wayne Johnson. Helicopter Theory. p. 14.
^ Florian Ion Petrescu, Relly Victoria Petrescu. The Aviation History. p. 73.
^ Stanley S. McGowen. Helicopters: An Illustrated History of Their Impact. p. 6.
^ Air Progress: 56. December 1971. {{cite journal}}: Missing or empty |title= (help)
^ "New Helicopter Rises in Vertical Flight". Popular Science: 70. March 1931.

External links

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Retrieved from "https://en.wikipedia.org/w/index.php?title=Pescara_Model_3_Helicopter&oldid=1227947948"

Categories:

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Development

Operational history

Variants

Specifications (Model 3)

See also

References

External links