» JT9D-3A/B747 «   ENGINE RATING PRESSURE RATION COMPUTER   » D-3A «
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PRATT & WHITNEY AIRCRAFT FLIGHT OPERATIONS ENGINEERING, USA   (1970)

This SR was invented by Anselmo Toni, Wapping, Connecticut / USA  in
1970.  Its purpose  is  to determine  turbine engine  pressure ratio
limits during engine operation for several inflight ratings.  It was
used in the first "JumboJet" BOEING 747-100 with the Pratt & Whitney
JT9D high-power turbines.
                                                          impressum:
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© C.HAMANN       http://public.BHT-Berlin.de/hamann         11/12/12