I understand that you need to put anti ice on when going through clouds as this is modelled. However if you are on the ground, is there a function allowing de-iceing and does this affect hold over times?

Actually I think Ryan has said they don't model icing since they ran out of animations and it's just not that common in high-flying airliners.

As I understand, Engine Anti Ice & Wing Anti Ice should be used for all ground operations when OAT < 10C & Visable Moisture.Same for EAI in the air, not sure about wing anti-ice though in the air.

I'm not sure about ENG A/I, but I know Wing A/I cannot be used for takeoff. If you leave it on and advance throttles, the switch will automatically flick off.

Actually I think Ryan has said they don't model icing since they ran out of animations and it's just not that common in high-flying airliners.

I'm not sure but i think he was talking about the visual model. I think he wasn't talking about the effects of icing on the simulation/systems.

^ I think so too. I'm quite sure that the systems themselves are fully modeled.

My post is about DE-ICING (little men who come over to spray you aircraft with fluid) and whether the requirement for de-icing on the ground is modelled and if so would this affect hold over timings.

De-icing and Anti ice are completely different processes. while de-icing is defined as removal of existing ice etc, anti-icing process prevent from aircraft accumulation of ice on some important aircraft structures such as slats and engine air intake lips.

Get AES and you will get your big trucks to come out and cover your plane in green goop. No little men however sorry. Would be a sight though wouldn't it? Like taking off from Willy Wonka's Chocolate Airfield. He comes out with his cane, does a little flip, blows on his pipe, and out comes some Umpalumpas to deice your plane. How thoughtful of him.

Ok back to the serious question, De-Icing /Anti Iceing, this can be achieved by one step or two steps and also depending on the type of fluid used, and depending on the type of weather conditions and Outside air temperatures this then affects the hold over times, the subject came up as I was dicussing how the temperature on the windscreen is affected by the sunlight, so if this is modelled then we wondered if de-icing was also modelled,so this is why I asked if De-Icing is modelled whilst on the ground.

No little men however sorry. Would be a sight though wouldn't it? Like taking off from Willy Wonka's Chocolate Airfield. He comes out with his cane, does a little flip, blows on his pipe, and out comes some Umpalumpas to deice your plane. How thoughtful of him.

Ha! That gave me a good laugh. Thanks for that.

Ok back to the serious question, De-Icing /Anti Iceing, this can be achieved by one step or two steps and also depending on the type of fluid used, and depending on the type of weather conditions and Outside air temperatures this then affects the hold over times, the subject came up as I was dicussing how the temperature on the windscreen is affected by the sunlight, so if this is modelled then we wondered if de-icing was also modelled,so this is why I asked if De-Icing is modelled whilst on the ground.

Your question has already been answered. No. AES simulates the visual effects of being de-iced! They've said they're simulating an aircraft, not an airport equipment simulator, so I'd assume due to animation limits that PMDG will leave this to AES etc etc.

Im hoping FS2crew will come with the De-Ice option like it does with ifly. You can instruct the F/O to put the aircraft into the correct De-ice setup. Combine that with AES de-ice facility and your on your way hehe. I think its far outside the realm of home flight simulation to correctly model Ice build up. Heck FSX even struggles to put rain in the right place. (ie its raining when theres no cloud sometimes lol) imagine if you tried to get it to do ice!.

Assuming you ment anti icing, and icing conditions, again I beg to differ, I have pictures of a common occurance of our airliners picking up 3-4 inches on everysingle leading edge of the aircraft of impact ice during decent in the winter months. Icing is very common in certain parts of the world, even for the highflying fast people movers.

Oh I can assure you that de-icing is common in high flying airliners, At my airline we deice aircraft August thru to April.

He didn't mention de-icing. He was speaking of anti-ice. As in airliners of the 737's size or better just don't have issues with icing these days.