I know it may sound stupid and maybe I should know but I couldn't find any good info on it yet...When do you turn on anti-ice (engine/wing), especially in the PMDG737? At a given temperature or certain conditions met? I did my flights without any anti-ice on so far and never had problems but I would like to fly "realistic"... ;)ThanksDirk Rademann

DirkI think this is operator specific to a certain degree.But as a rule of thumb. Whenever you could expect icing you should turn the EAI (Engine Anti-Ice) and WAI (Wings Anti-Ice) ON. When the TAT is around zero degrees is a good indication EAI should be turned ON. Icing can also occur in clouds, thus turn EAI/WAI on when passing through clouds. WAI will not be available during take off. If WAI is ON prior to take off, the WAI switch will trip to OFF during take off. This is to prevent degradation of stage two climb performance.I'm sure there are other people around that can fill me in, or correct me here, so please do. ;-)TGIF,

Turn on Engine/Wing Anti Ice when TAT in the air or OAT on the ground is 10 degrees C or less and you've got visible moisture or you've got slush, water, etc on the taxiway/aprons that the engines could ingest or freeze on the engines or nacelles.Set ignition to CONT prior to activating Engine/Wing Anti Ice, and leave it there.Don't use Wing Heat on Take Off. Turn it back on not below 800 above the ground.-Bryan

Hi Dirk,Engine anti ice should be switched on whenever following conditions are met:- SAT (static air temperature) above -40

Thanks for the replies :) I'll do it this way then.So Wing-Ice isn't modeled in the FS (I'm using FS2004), but how about the engine ice (in FS). I ask cause I never noticed a difference and my flights are taking place in rather cold places, Germany and up to Finland and recently a flight to Reykjavik and I never had a problem, at least I did not notice one. I guess the engine(s) will just shut down when it gets to "icy"?RegardsDirk

Yea good question, I was wondering about the same thing. I usually turn on the engine/wing anti ice when the TAT is +5, but like Dirk says I've never noticed any difference if I forgot.

I have a faint memory of a discussion about ice build up in FS2k2. I think that a guy did notice a difference in speed and pitch attitude while flying in a small plane and with "good" conditions for ice. It took some time for this to happen, unlike the dreaded frozen pitot tube... If there is any simulation of wing/body/engine icing it is rather subtle (not that I have any real world experience to compare with) and needs the proper conditions of temperature, dewpoint, moisture and whatever else is needed. In other words, it

The indications for engine icing would be engine stalls/surges accompanied by loud bangs. The resulting loss of thrust on one side would cause a sudden yaw momentum followed by a reverse yaw momentum as the thrust is restored again. I have never seen this happen in FS2002.Wing anti ice is trickier. Unusual attitude would be one indication, but it really depends on where the ice has accumulated (and how much). Just as unusual vertical speeds (shallow climb with max thrust and light aircraft) or very high negative vertical speeds during descent would be another indication. Again, I have never seen this happen in FS2002.Note, if its "only" cold, it doesn't mean icing conditions exist. You can have a crystal clear day with a temperature of -2

What about fs9. Have you got any info if fs9 is capable of simulating ice buildup on the wings and in the engine?

Hi,No sorry. I have hardly any experience with FS9 and haven't heard of its capabilities in this regard.Maybe someone else?Regards,Mark

I'm not sure of this but I think once you have selected a flap setting for either takeoff's or landing's, continuous ignition is automatic. Can someone confirm this or is this just on some types of aircraft or airline-specific..Regards,jack noullet

Jack,Sounds like a bus to me! ;-)Jokes aside, haven't read or heard about ignition being automatic on the NG.TGIF, :-beerchug

I think I know now where I got the info on 'continuous ignition' being continuously on. It has to do with the Auto Ignition Selector on a 747-400. This switch operates automatically when selected to 'Auto' and will operate the selected ignitor under certain conditions; one of which is the trailing edge flaps being-- 'out of the up' position. Others include when nacelle anti-ice is on and/or a flameout is detected. There may be others as well..I would assume that this would be the case with the 'NG' since it is a newer addition to the Boeing class of 'glass cockpits'.Regards and who knows, maybe the above is correct. I'm not saying it is but I suspect it is...Would love a confirmation on the above.Regards to all,jack noullet

>Would love a confirmation on the above.>>A reading from the Book of Bulfer (737 cockpit companion):Engine Start Switches page 101.And the Bulfer did say, yea verily, the AUTO position (an option) works same as OFF except provides automatic ignition to selected igniters when engine is running and flaps are not up below 18,000 feet or engine anti-ice is turned on.Page 102 - auto-relight (NG)EEC activates both igniters for engine flameout protection when start lever is in IDLE and and an uncommanded rapid decrease in N2 occurs, or N2 is 50-57%, or in flight, start switch is OFF and N2 is below idle RPM.This is the word of the BulferThanks be to Boeing.