Multi-spool by-pass turbofan engine
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United States of America Patent
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Nov 18, 2003
Grant Date -
Sep 11, 2003
app pub date -
Mar 5, 2002
filing date -
Mar 5, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multi-spool turbofan engine has a plurality of circumferentially spaced poppet valves with diverters secured thereto for precisely controlling bleed of combustion gas aft of the high pressure turbine whereby the high pressure spool operates at high idle RPM so as to power accessories and the low pressure spool operates at low RPM so as to minimize noise and fuel consumption.
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