Settings failures

"Vernon Balbert" <vbalbert.RemoveThis@gmail.nospam.com> schreef in bericht
news:BCb3k.7286$mh5.2154@nlpi067.nbdc.sbc.com...
> On 6/9/2008 7:44 AM, wim.dijkgraaf went clickity clack on the keyboard and
> produced this interesting bit of text:
>> Flying FSX B 747 all set accordingly ATC suddenly the altitude and or
>> speed is set on the panel at zero.
>> It happens during messages from ATC and I think that working with the
>> mouse on the 1e screen changes the settings on the panel at 2nd screen.
>> Do anybody has the same experiens?
>
> Afraid I haven't seen this. Is it only the 747 or does it happen with
> other aircraft?

Speed is normal, if there are icy conditions, pitot heat will prevent this.

If you are descending from hi altitude in to a moisture area (clouds) then
this is normal.


Pitot tubes on aircraft commonly have heating elements to prevent the tube
from becoming clogged with ice. The failure of these systems has
catastrophic consequences, like in the case of Austral Líneas Aéreas Flight
2553.

Willem

At happend after take-off. Increasing altitude from 24000 to 34000 with vs
1600 and a speed of 325 kts on auto pilot. The speed changed to zero and the
altitude back to 24000 with a vs of -1400. So far only one B747 has has
this sickness. I will try others in the next few days.
Wim Dijkgraaf

"Willem Van der Voort" <willem.vandervoort.RemoveThis@pandora.invalid> schreef in
bericht news:iXc3k.45648$cL6.4333@newsfe27.ams2...
>
> "Vernon Balbert" <vbalbert.RemoveThis@gmail.nospam.com> schreef in bericht
> news:BCb3k.7286$mh5.2154@nlpi067.nbdc.sbc.com...
>> On 6/9/2008 7:44 AM, wim.dijkgraaf went clickity clack on the keyboard
>> and produced this interesting bit of text:
>>> Flying FSX B 747 all set accordingly ATC suddenly the altitude and or
>>> speed is set on the panel at zero.
>>> It happens during messages from ATC and I think that working with the
>>> mouse on the 1e screen changes the settings on the panel at 2nd screen.
>>> Do anybody has the same experiens?
>>
>> Afraid I haven't seen this. Is it only the 747 or does it happen with
>> other aircraft?
>
> Speed is normal, if there are icy conditions, pitot heat will prevent
> this.
>
> If you are descending from hi altitude in to a moisture area (clouds) then
> this is normal.
>
>
> Pitot tubes on aircraft commonly have heating elements to prevent the tube
> from becoming clogged with ice. The failure of these systems has
> catastrophic consequences, like in the case of Austral Líneas Aéreas
> Flight 2553.
>
> Willem
>

"wim.dijkgraaf" <wim.dijkgraaf.DeleteThis@casema_weg.nl> schreef in bericht
news:affc5$484e2780$53526998$21370@cache90.multikabel.net...
> At happend after take-off. Increasing altitude from 24000 to 34000 with vs
> 1600 and a speed of 325 kts on auto pilot. The speed changed to zero and
> the altitude back to 24000 with a vs of -1400. So far only one B747 has
> has this sickness. I will try others in the next few days.
> Wim Dijkgraaf

>> Speed is normal, if there are icy conditions, pitot heat will prevent
>> this.
>>
>> If you are descending from hi altitude in to a moisture area (clouds)
>> then this is normal.
>>
>>
>> Pitot tubes on aircraft commonly have heating elements to prevent the
>> tube from becoming clogged with ice. The failure of these systems has
>> catastrophic consequences, like in the case of Austral Líneas Aéreas
>> Flight 2553.
>>
>> Willem


I did the following to have ice in the pitot tube. (and no speed reading)



Set your weather manual, via customize weather and advanced weather.



Set clouds overcast top 12000 base 5000

Set ice severe

Set the temperatures

3000ft 25 deg c and dewpoint 17 deg c

6000ft 15 deg c and dewpoint 10 deg c

10000ft 13 deg c and dewpoint 15 deg c

12000ft -50 deg c and dewpoint -5 deg c

Set temp above 12000ft below -50 deg c (-55 etc.)

And make a flight to above 20000 feet



Success



Willem