title: Ivchenko AI-8
text: # Ivchenko AI-8
  
  The Ivchenko AI-8 is an aircraft auxiliary power unit developed and produced by Ivchenko-Progress and Motor Sich.
  
  ## Variants
  
  ### AI-8
  
      The base model which is used to generate electricity or supply compressed air to air-start systems. It can also be used as cabin heating if necessary.
  
  ## Specifications (AI-8)
  
  Data from Aircraft engines of the World 1970
  
  **General characteristics**
  
  * Type: Auxiliary Power Unit (APU)
  * Length: 725 mm (28.5 in)
  * Width: 600 mm (24 in)
  * Height: 550 mm (22 in)
  * Diameter: ~500 mm (20 in) casing diameter
  * Dry weight: 145 kg (320 lb)
  
  **Components**
  
  * Compressor: 1-stage centrifugal compressor
  * Combustors: Annular combustion chamber with 6 fuel injectors
  * Turbine: 1-stage axial turbine (gas generator) ; 1-stage (free power turbine) - generator drive at 4:1 ratio
  * Fuel type: Aviation Kerosene such as JP-4
  
  **Performance**
  
  * Maximum power output: 75 kW (100 shp) at 37,000 rpm or 60 kW DC from TCP-24 electric generator at 9,250 rpm gearbox output
  * Overall pressure ratio: 3.15:1
  * Air mass flow: 1.75 kg/s (231 lb/min) at 37,000 rpm
  * Fuel consumption: 120 kg/h (260 lb/h) maximum
  * Power-to-weight ratio: 0.51 kW/kg (0.31 shp/lb)
  