Pratt & Whitney/Allison 578-DX
| Model 578-DX | |
|---|---|
| Type | Propfan |
| National origin | United States |
| Manufacturer | Pratt & Whitney / Allison Engine Company |
| First run | 1986 |
|
| |
The Pratt & Whitney/Allison 578-DX was an experimental aircraft engine, a hybrid between a turbofan and a turboprop known as a propfan. The 578-DX was developed as a joint venture between Pratt & Whitney and Allison. Unlike the competing General Electric GE-36 UDF, the 578-DX was fairly conventional, having a reduction gearbox between the LP turbine and the propfan blades. Noise considerations, plus a significant reduction in the real cost of aviation fuel, brought the NASA funded program to a halt.
The engine was tested with 11.6 ft propfans in 1989 on a modified MD-80.[1]
Specifications
Data from Air Progress
General characteristics
- Type: Propfan
- Length:
- Diameter:
- Dry weight:
Components
- Compressor:
- Fuel type: Aviation kerosene to MIL-F-5624E / JP-4 / JP-5
Performance
- Maximum thrust: 20,000 lb
- Power-to-weight ratio:
See also
- Comparable engines
- Related lists
References
- ↑ Air Progress: 30. August 1989. Missing or empty
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- Flight International (2007-07-12). "Whatever happened to propfans?". Retrieved 2007-07-14.
External links
- titanium-aluminide New-Generation GE Open Rotor and Regional Jet Engine Demo Efforts Planned
- "Green sky thinking - carbon credits and the propfan comeback?", Flight International, June 12, 2007.
- "The Short, Happy Life of the Prop-fan" AirSpaceMag.com
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