Originally Posted by
flyburg
The winds changing was more due to the failure of the pitot static system an not the actual winds changing I've been told that the indications we saw were natural for the particular failure although in the real world it should have been a clue!!
Sounds absolutely possible. Wind speed is calculated based on TAS and GS (and hground track). TAS itself being calculated from IAS. And herein lies the problem. When IAS is unreliable, so is TAS and thus calculated wind speed.
Also the values might be possible. When cruising at 230kts IAS while having an IAS reading of 30kts due to icing the difference would be 200kts (IAS/CAS), so the FMS would consider this difference as wind speed. However during your M1.1 adventure the wind speed reading should have been even quite a bit higher, especially, when being at a lower altitude if the IAS reading was still below 30kts.
Do you know how they did simulate the windspeed in the Sim? Is there a program to emulate all effects of pitot icing ? Or was it manually controlled by your examiner.
Interesting and enlighteneing story, btw.
regards, Henra