PROFILPELAJAR.COM

PW300
	PW308 used on the WhiteKnightTwo
Type	Turbofan
National origin	Canada
Manufacturer	Pratt & Whitney Canada
First run	1988
Major applications	Cessna Citation Latitude ; Cessna Citation Sovereign ; Dassault Falcon 2000 ; Dassault Falcon 7X ; Fairchild Dornier 328JET ; Gulfstream G200

The Pratt & Whitney Canada PW300 series is a family of turbofan jet engines developed by Pratt & Whitney Canada specifically for business jet applications.

Design and development

The PW 300 series has been developed in partnership with MTU who are responsible for the low pressure turbine.

The first variant, the PW305A, has the following configuration and was designed with a core flexible enough for engines with take-off thrusts from 20 kN to 31 kN (4,500 to 7,000 lb): a single-stage fan driven by a three-stage low pressure turbine, supercharging a four-stage axial/single-stage centrifugal high-pressure compressor, driven by a two-stage high-pressure turbine. An annular combustor is used. There is no forced mixing before the bypass and core streams leave the engine through a common nozzle. The engine is controlled with a dual channel Full Authority Digital Engine Control (FADEC) system.^[2]

The PW307A is a new centre-line engine developed specifically for a tri-jet application on the Dassault Falcon 7X. The PW307 was certified by Transport Canada in March 2005.

The PW308A has been chosen to power the Scaled Composites White Knight Two, the launch aircraft for Virgin Galactic's SpaceShipTwo.^[3]

Unscheduled interventions went from 85% in 2015 to 20% in 2017, driving up the PW307 availability thanks to Pratt's digital platform, and engine dispatch reliability is at 99.4% for the Falcon 7X/8X powered by the PW307.^[4]

Variants

PW305A: 20.81 kN (4,680 lb_f) variant used on the Bombardier Learjet 60.
PW305B: 23.41 kN (5,260 lb_f) variant used on the Hawker 1000.
PW306A: 25.36 kN (5,700 lb_f) variant used on the IAI Galaxy & Gulfstream G200.
PW306B: Variant used on the Dornier 328JET.
PW306C: 25.67 kN (5,770 lb_f) variant used on the Cessna Citation Sovereign.
PW306D: 26.28 kN (5,910 lb_f) variant used on the Cessna Citation Sovereign +.
PW306D1: 25.6 kN (5,800 lb_f) variant used on the Cessna Citation Latitude.
PW307A: 28.49 kN (6,400 lb_f) variant used on the Dassault Falcon 7X.^[5] Originally 27.1 kN (6,100 lb_f) growth version of the PW306, smaller than the PW308, featuring swept-blade fan, increased core airflow, low NOx emissions combustor, increased turbine capacity and a more efficient exhaust mixer; integrated propulsion system including Macchi/Hurel Dubois nacelle and thrust-reverser; certification scheduled for the end of 2004.^[6]
PW307B: Variant used on the Bombardier Learjet 85.
PW307D: Variant used on the Dassault Falcon 8X.
PW308A: 30.69 kN (6,900 lb_f) variant used on the Hawker 4000 & Scaled Composites White Knight Two.^[7]
PW308C: 31.14 kN (7,000 lb_f) variant used on the Dassault Falcon 2000EX/DX/LX.

Applications

Specifications (PW306B)

Data from Jane's all the World's Aircraft 1993–94^[8]

General characteristics

Type: Turbofan
Length: 2,062 mm (81.2 in)
Diameter: 970.3 mm (38.20 in)
Dry weight: 450 kg (990 lb) installed

Components

Compressor: 1-stage fan, 4-stage axial with 1-stage centrifugal high pressure compressor
Combustors: Annular
Turbine: 2 stage high pressure, 3 stage low pressure turbines.
Fuel type: Aviation Kerosene such as JP-1, JP-4, JP-5 or CPW-204
Oil system: Pressure spray integral system with gear pump and scavenge, capacity 2.11 US gal (1.76 imp gal; 8.0 L)

Performance

Maximum thrust: 23.24 kN (5,220 lb_f) for take-off or flat-rated at 21.13 kN (4,750 lb_f) up to 25 °C (77 °F)
Cruise thrust: 5.03 kN (1,130 lb_f) at M0.8 at 12,200 m (40,000 ft)
Overall pressure ratio: Core pressure ratio: 15:1
Bypass ratio: 4.5:1
Specific fuel consumption: 41.5 kg/kN/h (0.407 lb/lbf/h) at take-off
Cruise s.f.c.: 69.9 kg/kN/h (0.685 lb/lbf/h)
Thrust-to-weight ratio: 5.26 at take-off power

References

^ "V.2500 flies in May". Flight International. 8 April 1988.
^ Optimization Studies for the PW305 Turbofan,Karanjia and Harvey, AIAA 90-2520,AIAA/SAE/ASME/ASEE 26th Joint Propulsion Conference,Orlando,FL,p.5
^ Press release preview Archived 2008-05-17 at the Wayback Machine
^ Matt Thurber (October 9, 2017). "PurePower PW800 Nearing Entry Into Service". AIN.
^ "Type certificate data sheet No. A59NM" (PDF). FAA. June 27, 2016. Archived from the original (PDF) on December 5, 2017. Retrieved April 28, 2017.
^ Graham Warwick (13 Nov 2001). "Latest P&WC turbofan set to power Dassault Falcon 7X corporate jet". Flight International.
^ [1] Archived February 21, 2010, at the Wayback Machine
^ Taylor, Michael J.H.; Lambert, Mark; Munson, Kenneth, eds. (1993). Jane's all the World's Aircraft 1993–94 (84th ed.). Coulson, Surrey, UK: Jane's Information Group. p. 604. ISBN 978-0710610669.