WILLIAMS ROLLS Royce's FJ44-2 engine for the Raytheon Premier I and Sino Swearingen SJ30-2 light business jets is meeting its thrust and specific-fuel-consumption targets in ground tests, says company founder Dr Sam Williams. The 10kN engine's third-generation, integrally bladed, "wide-sweep fan" is achieving unprecedented efficiency, he says, and cruise performance at Mach 0,8 and 41,000ft (12,500m) is "world-beating".
The FJ44-2 uses the same core and two-stage low-pressure (LP) turbine as the 8kN (1,800lb) FJ44-1 powering the Cessna CitationJet. The core uses a centrifugal high-pressure (HP) compressor and uncooled HP turbine. The LP compressor has three axial stages, compared with one in the -1, and a forced exhaust-mixer has been added to increase efficiency.
The new engine has a single-channel Woodward Governor electronic control-unit, with hydro-mechanical backup.
Source: Flight International
