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aeronewsline :: Accueil :: Histoire :: Aéronefs 1956 à 1965
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Westland Westminster
par PENSI3 Ven 16 Juil 2010, 21:19
L'hélicoptère Westland Westmintser sur Wikipedia.en
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The Westland Westminster was a British helicopter of the 1950s from [Vous devez être inscrit et connecté pour voir ce lien].
A large cargo design, it was powered by two turboshaft engines driving a single, five-bladed rotor.
Initially unclad, the all-metal airframe was later enclosed in a fabric covering.
Designed and built as a private venture without government assistance, it was cancelled when Westland took over rival helicopter producers and their more advanced projects.
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[Vous devez être inscrit et connecté pour voir ce lien]
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The Westland Westminster was a British helicopter of the 1950s from [Vous devez être inscrit et connecté pour voir ce lien].
A large cargo design, it was powered by two turboshaft engines driving a single, five-bladed rotor.
Initially unclad, the all-metal airframe was later enclosed in a fabric covering.
Designed and built as a private venture without government assistance, it was cancelled when Westland took over rival helicopter producers and their more advanced projects.
PENSI3- CLUB
- Messages : 1013
Re: Westland Westminster
par PENSI3 Ven 16 Juil 2010, 21:21
Development
The Westminster was the first tangible result of efforts that [Vous devez être inscrit et connecté pour voir ce lien] had been making throughout the 1950s to
produce a gas-turbine-powered heavy-lift helicopter.
Projects ranged up to the remarkable W.90, a 450-seat troopship with three [Vous devez être inscrit et connecté pour voir ce lien] turbojets mounted on its rotor-tips.
The Westminster was the first tangible result of efforts that [Vous devez être inscrit et connecté pour voir ce lien] had been making throughout the 1950s to
produce a gas-turbine-powered heavy-lift helicopter.
Projects ranged up to the remarkable W.90, a 450-seat troopship with three [Vous devez être inscrit et connecté pour voir ce lien] turbojets mounted on its rotor-tips.
PENSI3- CLUB
- Messages : 1013
Re: Westland Westminster
par PENSI3 Ven 16 Juil 2010, 21:23
In 1954, Westland investigated licenced manufacture of the [Vous devez être inscrit et connecté pour voir ce lien] for the civil market with turboshaft power.
The company sought [Vous devez être inscrit et connecté pour voir ce lien] support for the proposal, but this was not forthcoming.
In June 1958, Westland obtained an extension to their licence agreement with [Vous devez être inscrit et connecté pour voir ce lien] to cover the five bladed main-rotor, gearbox, tail-rotor, transmission and control systems of the S-56.
Faced with continuing government indifference, Westland decided to press ahead with a private-venture design for a heavy-lift transport, built around the S-56 systems but powered by a pair of [Vous devez être inscrit et connecté pour voir ce lien] turboshafts.
At the time, Westland was heavily committed to development of the [Vous devez être inscrit et connecté pour voir ce lien] and the Westminster project had to be run on a shoestring.
The company sought [Vous devez être inscrit et connecté pour voir ce lien] support for the proposal, but this was not forthcoming.
In June 1958, Westland obtained an extension to their licence agreement with [Vous devez être inscrit et connecté pour voir ce lien] to cover the five bladed main-rotor, gearbox, tail-rotor, transmission and control systems of the S-56.
Faced with continuing government indifference, Westland decided to press ahead with a private-venture design for a heavy-lift transport, built around the S-56 systems but powered by a pair of [Vous devez être inscrit et connecté pour voir ce lien] turboshafts.
At the time, Westland was heavily committed to development of the [Vous devez être inscrit et connecté pour voir ce lien] and the Westminster project had to be run on a shoestring.
PENSI3- CLUB
- Messages : 1013
Re: Westland Westminster
par PENSI3 Ven 16 Juil 2010, 21:26
Two variants were initially envisioned: a 40-seat, short-range civil transport and a flying crane with a 15,000 lb capacity.
In March 1956, Westland decided to build the first prototype as a flying test rig with a tubular steel [Vous devez être inscrit et connecté pour voir ce lien] in place of the main fuselage; cockpit power-train and undercarriage attached to this.
With economy a priority, off-the-shelf components were used as far as possible, with donors such as the Westland
Whirlwind helicopter and the [Vous devez être inscrit et connecté pour voir ce lien] aeroplane.
This prototype was completed in February 1958; after the usual static and systems testing, engine runs and nearly 20 hours of "tied-down" engine testing, the first flight took place on 15 June.
In March 1956, Westland decided to build the first prototype as a flying test rig with a tubular steel [Vous devez être inscrit et connecté pour voir ce lien] in place of the main fuselage; cockpit power-train and undercarriage attached to this.
With economy a priority, off-the-shelf components were used as far as possible, with donors such as the Westland
Whirlwind helicopter and the [Vous devez être inscrit et connecté pour voir ce lien] aeroplane.
This prototype was completed in February 1958; after the usual static and systems testing, engine runs and nearly 20 hours of "tied-down" engine testing, the first flight took place on 15 June.
PENSI3- CLUB
- Messages : 1013
Re: Westland Westminster
par PENSI3 Ven 16 Juil 2010, 21:27
Flight testing showed up significant vibration. As a result, a number of changes were made in the design of the second prototype, including replacement of the main-rotor with the six-blade unit from the [Vous devez être inscrit et connecté pour voir ce lien].
Once the statutory ten hours had been flown, this first Westminster was registered G-APLE and work started on constructing the second prototype.
Once the statutory ten hours had been flown, this first Westminster was registered G-APLE and work started on constructing the second prototype.
PENSI3- CLUB
- Messages : 1013
Re: Westland Westminster
par PENSI3 Ven 16 Juil 2010, 21:31
The second prototype, registered G-APTX flew on 4 September 1959 and flight testing continued, but the British
helicopter industry was in a state of flux; the entire industry was being consolidated under Westland with the company's purchase of the helicopter divisions of [Vous devez être inscrit et connecté pour voir ce lien],[Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien]. In the process, Westland acquired two potential rivals to the Westminster: the projected [Vous devez être inscrit et connecté pour voir ce lien] and the [Vous devez être inscrit et connecté pour voir ce lien] (a [Vous devez être inscrit et connecté pour voir ce lien] design).
helicopter industry was in a state of flux; the entire industry was being consolidated under Westland with the company's purchase of the helicopter divisions of [Vous devez être inscrit et connecté pour voir ce lien],[Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien]. In the process, Westland acquired two potential rivals to the Westminster: the projected [Vous devez être inscrit et connecté pour voir ce lien] and the [Vous devez être inscrit et connecté pour voir ce lien] (a [Vous devez être inscrit et connecté pour voir ce lien] design).
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- Messages : 1013
Re: Westland Westminster
par PENSI3 Ven 16 Juil 2010, 21:33
Rationalisation was necessary and since the Rotodyne was already flying and government funded, work on the Westminster ceased in September 1960.The two aircraft were broken up; the components supplied by Sikorsky were stripped out and shipped back to the USA to avoid paying [Vous devez être inscrit et connecté pour voir ce lien] and the airframes were sold as scrap.
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- Messages : 1013
Re: Westland Westminster
par PENSI3 Ven 16 Juil 2010, 21:34
Specifications
Data from Westland Aircraft since 1915
General characteristics
Data from Westland Aircraft since 1915
General characteristics
- Crew: 2 (+2 observers projected)
- Capacity: (projected) 40 passengers
- Length: (including rotor) 89 ft 9 in (27.45 m)
- Fuselage length: 71 ft 4 in (21.74 m)
- Rotor diameter: 72 ft 0 in (21.95 m)
- Height: 21 ft 1 in (6.43 m)
- Disc area: 4,069 ft² (378.2 m²)
- Empty weight: 21,245 lb (9,657 kg)
- Loaded weight: 33,000 lb (15,000 kg)
- Powerplant: 2× [Vous devez être inscrit et connecté pour voir ce lien] E220 turboshaft, 2,920 hp (2,178 kW) each
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