KirkR Posted September 28, 2022 Report Share Posted September 28, 2022 Have been studying the Challenger's cold weather related operations, air and fuel temperature and other criteria as the winter weather approaches. ISA reference temp, static air temp (SAT) and total air temps (TAT) all are shown on the PFD(s). Bulk fuel and engine fuel temperatures are shown on the MFD Summary page. In what scenarios would the ISA reference temperature be used with the Challenger? The other temperatures are clear in terms of operational reference/usage. Quote Link to comment Share on other sites More sharing options...
FYG001 Posted September 28, 2022 Report Share Posted September 28, 2022 Performance Kirk, such as in the FPCCM Manual, see following example (one of many) Quote Link to comment Share on other sites More sharing options...
KirkR Posted September 29, 2022 Author Report Share Posted September 29, 2022 Ok, thanks. ISA as a standard reference for the performance related information makes sense. Quote Link to comment Share on other sites More sharing options...
ozpilot Posted October 19, 2022 Report Share Posted October 19, 2022 Interestingly the Challenger has no OAT indication. A lot of pilots will use SAT instead since SAT is the temperature of undisturbed air around the airplane. The AFM warns against this practice though since the SAT is only accurate when the aircraft is moving. So if your on the ground you have to use the ATIS/AWOS or your iPhone! 1 Quote Link to comment Share on other sites More sharing options...
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