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A comment on Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-Breaking Speeds. Parent comment

Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by TylerE on Tuesday February 19, 2019 @05:45PM (#19203669)
Not so slight. At airliner altitudes they can differ by 50% or so.

IAS is what the pilots care about while flying because it’s what matters for aerodynamics (ie stall speed)

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