Originally Posted by
flyhigh85
An aircraft can stall at any speed! It is the angle of attack which determines when stall (pitch angel) if they had flew at 350kt they would stall anyway if the nose was 40 degress nose up. A passenger airplane is is not designed nor have the trust required to do that, a rocket is a different thing.
i can’t remember exactly how it is but if your static or pitot ports are blocked (either one) your airspeed will increase with altitude. So if they put on the autopilot after take off the plane will pitch up and up to contain the airspeed increase and rather quickly put the aircraft in an unusal attitude, nose high low airspeed (actual airspeed). Autopilot will disconnect and stall warning alarms etc. If the pilots don’t react quicly and correct the airplane will stall. There might be a startle factor for the crew as well, which delay their reaction time. This only speculations from my side anyway. Tragic to see another fatal accident in Indonesia.
No, they would not stall at 350kts because the nose was 40 degrees up. the only reason for a stall is reaching critical angle of attack, and as long as you keep the nose pointing 40 degrees up and the speed at 350 kts and the wings level you will not stall. If you keep the nose at 40 degrees and you let the speed drop off, you might stall, but that didn't happen here, because if you start a fully loaded B737 at 5000' and 350 kts, and pull the nose up to 40 degrees with the power at idle, you will probably get to 10'000' before you get anywhere near stall speed, and the aircraft didn't climb. Also if you tried to get an accelerated stall st 300kts indicated you would rip off the wings before you stalled. In theory you can stall any wing at any speed as long as you pull enough, and EVERY pilot knows that, but most airplanes will break long before they stall if you pull hard at high speed. This aircraft probably had at least 300 kts IAS towards the end of the recording, making a stall the least of their worries.