Nasty Windshear Problems

[sho69607 27]

In the real world do aircraft ever overspeed for a few seconds and then have to fight to reduce speed to prevent damage to the aircraft. There has been windshear in FSX that has brought me from .79 to .89 in 2 seconds. Obviously this could cause major problems with the aircraft when windshear is doing this.

[Guest jahman]

Yes! After take-off from Melbourne, the overspeed alarm and warning sound during climb (0:00 - 0:10, in german) due to a sudden decrease in headwind, requiring the Lufthansa MD-11 captain to manually intervene to reduce airspeed (because the autothrottle does not react quickly enough). Cheers, - jahman.

[mjrhealth 152]

If you are using real weather, it will happen, fsx is no good at updating weather, FSUIPC ( pay) can help to smooth things a little, as do some weather programmes, but it wont stop it.

[TurboTomato 90]

Yes it does happen, as far as I'm aware it's the length of time it happens for, that determines whether action should be taken and if it may cause damage to the airframe.AF447 may well have overspeeded due to inaccurate airspeed readings. Apparently in an Airbus this can cause an uncommanded climb to reduce the airspeed as part of overspeed protection. Another A330 since AF447 has had this happen as well.

[Avantime 75]

If you're talking about mach numbers then I assume you encountered this during cruise. It happens but rarely, either by flying into a tropical thunderstorm cell with a massive change in temperature, or maybe entering the edge of a jetstream core. (Less likely)

[Guest jahman]

Yes it does happen, as far as I'm aware it's the length of time it happens for, that determines whether action should be taken and if it may cause damage to the airframe. AF447 may well have overspeeded due to inaccurate airspeed readings. Apparently in an Airbus this can cause an uncommanded climb to reduce the airspeed as part of overspeed protection. Another A330 since AF447 has had this happen as well.

AF447 was an underspeed stall. Overspeed stalls due to exceeding Mmo lead to an unrecoverable nose-down attitude due to Mach Tuck. AF447 was nose-up all the way down. Cheers, - jahman.

[Sekstifire 9]

FSUIPC wind smoothing is the solution for this, but an interrim solution that almost certainly would increase the realism factor as well would be to run at a lower cost index. In real life planes rarely fly m0.02 from their VMO. Especially these days where the price of fuel is really, really high. The airlines wants to save money and force their pilots to fly at incredibly low CI (think around 15-20 CI for Boeing 737NG).

[TurboTomato 90]

AF447 was an underspeed stall. Overspeed stalls due to exceeding Mmo lead to an unrecoverable nose-down attitude due to Mach Tuck. AF447 was nose-up all the way down. Cheers, - jahman.

Yes, I realise AF447 was stalled all the way down but before it entered the stall it had climbed up to its maximum altitude of FL380. I thought this was because of Airbus overspeed alpha prot but looking at it again I don't think it was. There has been an incident since and I think that was what I was thinking of!

[ZKOKQ 871]

Yes, I realise AF447 was stalled all the way down but before it entered the stall it had climbed up to its maximum altitude of FL380. I thought this was because of Airbus overspeed alpha prot but looking at it again I don't think it was. There has been an incident since and I think that was what I was thinking of!

You might be thinking of the Air New Zealand A320 ( x lease XL airways) on test flight southern france.http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10673901

[FLEX1978 371]

Alpha floor is low speed protection and inhibited above Mach .53 I think he is talkng about the high speed protection incident that happened fairly recently on another Air France A330. The aircraft actualy did what it was supposed to do but again the crew made the situation worse causing the aircraft to rapidly climb and almost stall. The problem is how do you properly train for stuff like that when the LVL-D sim cannot accurately replicate the true feel of manual flight at altitude and abnormal flight.Regards