While I am sure ERJ-190s do not exceed the speed of sound, today’s Air Canada ACA160, CYYC-CYUL showed up around 0900MST with an apparent speed of 590 knots at FL370 in FlightAware. Embraer gives the max cruise speed as 481kn. Now I am neither a pilot nor a mathematician, but if speed of sound at FL370 is in fact about 343m/s, and 590kn is also expressed as 303m/s, that gives mach 0.88, which is a bit higher than mach 0.82, the supposed max cruise speed. I am sure I am missing something here, such as adjusted or corrected air speed. Would someone be kind enough to furnish an answer to why this aircraft appears to have a greater velocity than possible?

Tailwind? Ground Speed vs. Indicated Air Speed?

All those numbers quoted in the literature are airspeed. Add or subtract the winds to get ground speed which is what you get here.

ive seen a Mooney M20 fly from KBUF to KIAD in 18 minutes, and a EC135 helicopter fly from South America to KROC in 35 minutes…3650nm in a half hour in a helicopter? umm yea

There’s a “report inaccurate information” link on each flight page that you can use to report data problems.

Notorious?? Really? Wow…