title: Napier Naiad
text: # Napier Naiad
  
  The Napier Naiad is a British turboprop gas-turbine engine designed and built by D. Napier & Son in the late 1940s. It was the company's first gas turbine engine. A twin version known as the Coupled Naiad was developed but both engine projects were cancelled before finding a market. The Naiad was also used, in adapted form, in the Napier Nomad turbo-compound engine design.
  
  ## Applications
  
  * Avro Lincoln - Test bed only
  
  ## Engines on display
  
  A Napier Naiad is on display at the Science Museum, London.
  
  ## Specifications (Naiad)
  
  Data from Flight
  
  **General characteristics**
  
  * Type: Turboprop engine
  * Length: 102 in (2,600 mm)
  * Diameter: 28 in (710 mm)
  * Dry weight: 1,095 lb (497 kg)
  
  **Components**
  
  * Compressor: 12-stage axial
  * Combustors: 5 chambers
  * Turbine: 2-stage (18,250 rpm)
  
  **Performance**
  
  * Maximum power output: 1,500 shp (1,100 kW) plus 241 lbf (1.07 kN) residual thrust
  * Overall pressure ratio: 5.5:1
  * Air mass flow: 17.2 lb/s (7.8 kg/s)
  * Fuel consumption: 96.2 US gal/h (364 L/h; 101.2 L/ks)
  * Thrust-to-weight ratio: 1.37 shp/lb (2.25 kW/kg)
  