Can someone explain the effects of the prevent all icing option unchecked. With option checked there is never icing and when unchecked I get severe icing to the point where descending to lower altitudes to regain airspeed and not stall. The airliners used is PMDG's 747-400F and Level-D 767. The engine anti-ice option becomes ineffective and over extended periods the plane may become uncontrollable.I am thinking the effects are overstated as the conditions experienced would require an immediate landing with the condition lasting maybe 15 or 30 minutes.Any ideas would be appreciated.

Hi,Those 2 planes seem to be real sensitive to icing levels. Are you using registered FSUIPC and adjusted the icing level in there?Hope this helps,Jimhttp://www.hifisim.com/Active Sky V6 Development TeamActive Sky V6 Proud SupporterHiFi Beta TeamRadar Contact Supporter

I have icing on and although I'm not a real pilot, the effect seems quite well. I haven't flown these aircraft so they might behave unrealistic with icing.In the filelibrary, there is a tool called AFSD which shows a lot of inflight parameters including icing. You could use that to check the amount of ice.

There may be in these aircraft three types of deicing:1. Engine Anti-Ice introduces hot turbine bleed air into the intake to melt chunks from doing compressor blade damage.2. Probe Deicing keeps pitot and static air ports from freezing over.3. Wing Deicing provides chemical, medchanical, and/or bleed air thermal protection for all or part of the wing surfaces especially the leading edge. This is also known as structural deicing.#2 can screw up the instrument sensors if not activated. #3 protects the flight characteristics (lift and angle of attack) of the wings (and indirectly reduces drag) which prevents airflow seperation around the wing from destroying lift and inducing stalls.Be sure you engage each type, probably on seperate switches, as needed.

>Hi,>>Those 2 planes seem to be real sensitive to icing levels. Are>you using registered FSUIPC and adjusted the icing level in>there?>>Hope this helps,>Jim>>http://www.hifisim.com/>Active Sky V6 Development Team>Active Sky V6 Proud Supporter>HiFi Beta Team>Radar Contact SupporterI have the registered version but do not know what the levels should be adjusted.Good that you noticed how both planes under icing conditions are wicked.

>There may be in these aircraft three types of deicing:>>1. Engine Anti-Ice introduces hot turbine bleed air into the>intake to melt chunks from doing compressor blade damage.>>2. Probe Deicing keeps pitot and static air ports from>freezing over.>>3. Wing Deicing provides chemical, medchanical, and/or bleed>air thermal protection for all or part of the wing surfaces>especially the leading edge. This is also known as structural>deicing.>>#2 can screw up the instrument sensors if not activated. #3>protects the flight characteristics (lift and angle of attack)>of the wings (and indirectly reduces drag) which prevents>airflow seperation around the wing from destroying lift and>inducing stalls.>>Be sure you engage each type, probably on seperate switches,>as needed.>Both have engine nacelle and wing anti-ice both neither seems to effect icing. Airspeed begins to decay and eventually a stall will be induced at the cruise altitude.

Hi,It's a value setting from 1 to 5 with 5 being extreme icing. I believe the default is 3.Hope this helps,Jimhttp://www.hifisim.com/Active Sky V6 Development TeamActive Sky V6 Proud SupporterHiFi Beta TeamRadar Contact Supporter

>>Both have engine nacelle and wing anti-ice both neither seems>to effect icing. Airspeed begins to decay and eventually a>stall will be induced at the cruise altitude.>If they do not at least model structural and pitot deicing, that is discouraging. I have freeware turboprops that do.Reading the info at www.b737.org.uk, wing anti-icing as I recall can not be activated under certain leading edge slat or trailing flap conditions. I wonder if that is modeled. I have not been in that situation.

>>>>>>Both have engine nacelle and wing anti-ice both neither>seems>>to effect icing. Airspeed begins to decay and eventually a>>stall will be induced at the cruise altitude.>>>>If they do not at least model structural and pitot deicing,>that is discouraging. I have freeware turboprops that do.>>Reading the info at www.b737.org.uk, wing anti-icing as I>recall can not be activated under certain leading edge slat or>trailing flap conditions. I wonder if that is modeled. I have>not been in that situation.>>I was thinking maybe the severe icing is overdone by Activesky or the aircraft are too sensitive.

>Hi,>>It's a value setting from 1 to 5 with 5 being extreme icing. I>believe the default is 3.>>Hope this helps,>Jim>>http://www.hifisim.com/>Active Sky V6 Development Team>Active Sky V6 Proud Supporter>HiFi Beta Team>Radar Contact SupporterShould I leave prevent all icing checked and try FSUIPC value setting or uncheck prevent all icing and try each value setting?Thanks,

Hi,Un-check and try each value.Thanks!Hope this helps,Jimhttp://www.hifisim.com/Active Sky V6 Development TeamActive Sky V6 Proud SupporterHiFi Beta TeamRadar Contact Supporter