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Napier Eland


Napier-Eland

 

The Napier Eland was a British turboshaft or turboprop gas-turbine aero engine built by Napier & Son in the early 1950s. The Eland was first tested in 1953 in a Vickers Varsity aircraft. Further flight proving was carried out from 1955 using the first production Airspeed Ambassador 2.

The Eland was used to power various aircraft including the Westland Westminster heavy-lift helicopter, the Canadair CL-66; a turbine-powered version of the Convair CV-340 for the Canadian military (later converted to Allison T-56 propjets after a number of engine failures), and the Fairey Rotodyne gyroplane. In the Rotodyne, the Eland powered the tractor propellors for forward flight and a compressor, via a clutch and shaft arrangement, to feed the rotor tip-jets with compressed air for vertical flight.

The Eland was dropped from production when Napiers was acquired by Rolls-Royce Limited in 1961.

 

Applications:   
Turboshaft
Westland Westminster

 

Turboprop
Airspeed Ambassador
Canadair CC-109 Cosmopolitan
Canadair CL-66
Convair CV-540
Fairey Rotodyne
Vickers Varsity (one aircraft as an engine test bed in 1954)

 

Specifications:
Eland N.El.6
Type: Single-shaft turboprop
Length: 120 in (3,048 mm)
Diameter: 36 in (914 mm)
Dry weight: 1,735 lb (787 kg)
Compressor: 10-stage axial flow
Combustors: 6 chambers
Turbine: 3-stage
Fuel type: Jet fuel
Maximum power output: 3,500 eshp (2,610 kW)
Overall pressure ratio: 7:1
Specific fuel consumption: 0.595 lb/hr/eshp
Thrust-to-weight ratio: 2.0 eshp/lb (3.3 kW/kg)

 

 

 

 

 

 


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