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Projects - Rolls-Royce VIPER 522 TurboJet

Viper Main    Viper Spec's    Viper Background    Theory of Operation

Specifications: (temperatures and pressures quoted at ISA spec)

Manufacturer....................................Rolls-Royce (manufactured during the Bristol / R-R takeover)
Date of manufacture.........................1966
Series................................................Viper 522
Serial Number..................................522113
Weight..............................................370 kg / 816 lb
Centre of Gravity..............................66mm / 2.6" forward of trunnion housing.
Type..................................................Turbojet, straight flow, non-reheated.
Compressor.......................................8 Stage Axial
Turbine.............................................Single Stage Impulse/Reaction Turbine
Combustion......................................Annular Combustion Chamber
Fuel Injection....................................6 Starter Atomising type Burners and 12 Primary Main Vapourising type burners.
Fuel Flow @ Max RPM......................1,551 kg/hr / 3,420 lb/hr
Jet Pipe Temperature (JPT)................645°C  for normal running ; 740°C max. governed speed ; 800°C max.(start) Ignition..............................................2 High Energy Spark Ignition Modules, 6J @ 3kV.
Thrust................................................14.9 kN / 3,360 lbs
Jet Pipe Nozzle Diameter...................350mm / 13.7"
Maximum RPM.................................13,760 RPM (100% ; 103% allowed for 5 seconds)
Self Sustaining Speed.........................1,513 RPM (11%)
Fuel....................................................Jet-A1 / AVTUR / AVGAS / AVTAG or any wide cut Kerosine.
Oil System.........................................Front bearing & gearbox = scavenge system. Main  & rear bearing =metered loss system.
Oil Type.............................................Shell ASTO 500 / Mobil Jet Oil / Texaco SATO 7730 / Castrol 580
Oil Consumption................................Less than 1 pint per hour
Oil Capacity.......................................7.4 Litres / 13 Pints
Nominal Oil Pressure.........................32 psi / 1.44 bar
Nominal Oil Temperature..................60-70°C
Cooling...............................................Turbine wheel front & back by 7th Stage air. Nose cone/anti icing by 6th stage air.