The Manzolini Libellula was a 1950s Italian co-axial twin-rotor helicopter designed by Ettore Manzolini. "Libellula" is the Italian word for "Dragonfly".
Ettore Manzolini established a company in Rome, Italy to develop a helicopter he had designed. The design was the Manzolini Libellula an unusual co-axial helicopter. The co-axial arrangement eliminating the need for an anti-torque rotor allowed the helicopter to have a twin fin arrangement. The Libellula (Registered I-MANZ) first flew on 7 January 1952. An improved version was the single-seat Libellula II which went on to gain Italian certification on 15 October 1962. A three-seater version (the Libellula III) was built and a four-seat Libellula IV was planned but Manzolini stopped development in the late 1960s.
Variantsedit
Libellula
Prototype, one built.
Libellula II
Prototype single-seat version powered by a 75kW (101hp) Walter Minor 4-III engine, one built.
Libellula III
Prototype two-seat version powered by a 104kW (140hp) Walter M 332 engine, one built but not flown.
Libellula IV
Proposed four-seat version powered by a 236kW (317shp) Allison 250-CT18 turboshaft, not built.
Specifications (Libellula II)edit
Data from Jane's All The World's Aircraft 1965–66[1]
manzolini, libellula, 1950s, italian, axial, twin, rotor, helicopter, designed, ettore, manzolini, libellula, italian, word, dragonfly, libellula, role, light, experimental, helicopter, manufacturer, manzolini, designer, ettore, manzolini, first, flight, janua. The Manzolini Libellula was a 1950s Italian co axial twin rotor helicopter designed by Ettore Manzolini Libellula is the Italian word for Dragonfly Libellula Role Light experimental helicopter Manufacturer Manzolini Designer Ettore Manzolini First flight 7 January 1952 Number built 3 Contents 1 Design and development 2 Variants 3 Specifications Libellula II 4 References 5 External linksDesign and development editEttore Manzolini established a company in Rome Italy to develop a helicopter he had designed The design was the Manzolini Libellula an unusual co axial helicopter The co axial arrangement eliminating the need for an anti torque rotor allowed the helicopter to have a twin fin arrangement The Libellula Registered I MANZ first flew on 7 January 1952 An improved version was the single seat Libellula II which went on to gain Italian certification on 15 October 1962 A three seater version the Libellula III was built and a four seat Libellula IV was planned but Manzolini stopped development in the late 1960s Variants editLibellula Prototype one built Libellula II Prototype single seat version powered by a 75kW 101hp Walter Minor 4 III engine one built Libellula III Prototype two seat version powered by a 104kW 140hp Walter M 332 engine one built but not flown Libellula IV Proposed four seat version powered by a 236kW 317shp Allison 250 CT18 turboshaft not built Specifications Libellula II editData from Jane s All The World s Aircraft 1965 66 1 General characteristicsCrew 1 Length 4 85 m 15 ft 11 in Height 3 06 m 10 ft 0 in Empty weight 498 kg 1 098 lb Max takeoff weight 650 kg 1 433 lb Powerplant 1 Walter Minor 4 III air cooled 4 cylinder inline engine 75 kW 101 hp Main rotor diameter 2 9 00 m 29 ft 6 in Main rotor area 127 2 m2 1 369 sq ft Performance Maximum speed 110 km h 68 mph 59 kn Cruise speed 90 km h 56 mph 49 kn econ cruise Range 200 km 120 mi 110 nmi max fuel 10 min reserve Service ceiling 2 900 m 9 500 ft Rate of climb 4 0 m s 780 ft min References edit Taylor 1965 p 95 Apostolo Giorgio The Illustrated Encyclopedia of Helicopters New York Bonanza Books 1984 Pg 123 ISBN 0 517 439352 Taylor John W R 1965 Jane s All The World s Aircraft 1965 66 London Sampson Low Marston amp Co Ltd The Illustrated Encyclopedia of Aircraft Part Work 1982 1985 Orbis Publishing External links edithttps www webcitation org 5knOcD2NL url http www geocities com CapeCanaveral Launchpad 5249 manzolini htm Portals nbsp Italy nbsp Companies nbsp Aviation Retrieved from https en wikipedia org w index php title Manzolini Libellula amp oldid 1221968645, wikipedia, wiki, book, books, library,
