They were above Vmo for most of the time - that is not within the normal flight envelope.
Even at the time when they were slightly below Vmo they were 100 knots over the normal climb speed (which they tried to set at 238 Knots on the Autopilot).
In any case in normal operation they would never get near Vmo (340 knots) - Climb is about 240 as above, cruise about 240 knots Indicated at altitude (above 35,000')- they would only go higher in a wings level descent and probably not get anywhere near Vmo. Reading Various Pilot forums on 737 descent seems to be 250 KIAS normal - up to about 280KIAS
At 10,000' above Sea Level - you need to be below 250 KIAS.
Not being a pilot, but it was mentioned earlier in this thread that with unreliable airspeed and/or stickshaker normal
air speeds are no longer applicable. Is that correct? What would be a normal airspeed range in said conditions?
"Climb at 240, cruise at 240"
If only there was a feature somewhere on the internet, where we could watch 737s in real time on radar, maybe 24 hrs a day, in order to glean some data regarding typical climb-outs.
The problem us peasants have is that without premium (paid) membership, we can only view groundspeed data, not IAS.
The first problem with that is wind direction, and variability at altitude, but if you pick a busy hub in a central location with lots of 737-800s departing, you can follow different flights heading North, South, East & West, and average out the results.
This still doesn't give you IAS, but here is what I found.
Boeing 737-800 aircraft will often reach 270kts groundspeed whilst climbing through 7,000ft
Between 10 and 12,000 ft, groundspeeds of 310 to 380 kts can be seen, with a strong suspicion the a/c at 380kts had the benefit of a tailwind.
However, by around FL200, 380kts is quite common in all directions.
And finally, a/c climbing through FL330 whilst on their way to even higher altitudes, would typically show 430-460kts groundspeed.
Somebody else will have to explain the intricacies of why groundspeed and IAS are different. I would have a go myself, but I'm under enough pressure as it is....
And if you are really lucky, somebody might even have FR24 premium membership and share some of their data with us.....
I also have observations regarding the often quoted 250 KIAS number, but you can read them in my next post to OAG.
Nothing to see here; move along please.