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#11
01-28-2010, 06:02 PM
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I can remember a James Cagney Film where he was a pilot testing these de-icing boots out.
I kind of forgotten what the film was called. The thing is that a surface only has to be warmed to 1 Celsius to stop ice forming. Wind chill is scientifically regarded as being -1 Celsius per 12 MPH of airspeed. So at 120 MPH, the wind chill factor will be an additional -10 Celsius below the noraml air temperature. Therefore, as bombers became faster and could fly higher, icing became growing problem. The PC based "Red Baron" simulator series, by Sierra, had icing effects including carb icing as there was an option to turn icing effects off. Last edited by Panzergranate; 01-28-2010 at 06:21 PM. 
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#12
01-28-2010, 06:29 PM
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'Wind Chill' is completely irrelevant. It is only meaningful when discussing an object (usually the human body) which is significantly warmer than the air temperature. Apart from any engine heat, and anything done to deliberately heat the wings, their temperature will be pretty much the same as the outside air temperature. The only way airspeed can make a difference is when there are friction effects in the transonic/supersonic range: not really significant in IL-2.
If the film mentioned 'wind chill' as affecting ice formation, it is just plain wrong.
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#13
01-28-2010, 10:18 PM
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Carburetor icing was always a concern in my flying history, no matter the time of year. RPM's drop had to be watched closely, and heat supplied via a switch when needed for icing...Would be cool to have the possibility of icing problems in SOW.
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#14
01-28-2010, 10:43 PM
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Carburetor icing would be relatively easy to simulate - it is done in FS 2004 and FSX for instance. This needs no visual model, but ice on wings etc would be more difficult to model accurately I'd have thought. Something for the future maybe, but I'd be surprised if it is included from the start. Still, you never know...
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#15
01-29-2010, 12:15 AM
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This is a great vid about horizontal stabilizer stall and loss of control due to icing on the horizontal stabilizer, just to keep you guys entertained.
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#16
01-29-2010, 01:23 AM
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S!
Airframe icing isn't really a concern at very high altitudes as most of the moisture in the air is already frozen.. Though equipment icing (i.e. guns) can be a problem, hence the practice of taping up gun ports prior to take-off to prevent water ingress and subsequent freezing at altitude. Airframe icing is more likely to accumulate at lower altitudes when taking a cold-soaked airframe through cloud or climbing through a warm front. W.
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#17
01-29-2010, 01:28 AM
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That video is seriously scary stuff. Line up on finals, select full flaps, and the control column is yanked forwards out of your hands. All you have to do to recover is pull hard back (if you can pull that hard), raise the flaps a bit and reduce power!
Maybe the Wright brothers got it right after all: at least with a canard, you can see the control surfaces. But then you can't see the ice build up on the wing...
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#18
01-31-2010, 05:15 PM
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As has already been pointed out, you need moisture to form ice. Stay out of the clouds and you are fine.
Icing is more of a low level to mid-level issue unless we have significant vertical development in our cloud structure. The most dangerous is freezing rain as an aircraft will accumulate ice very quickly. http://www.aopa.org/asf/publications/sa11.pdf Flying your airplane through hail is a great way to not have an airplane anymore. http://www.wunderground.com/blog/Jef...l?entrynum=586  Carburetor icing is very common in aircraft and can occur even in much warmer weather. Quote:
Even without injecting an oxidizer or ADI into the intake, even direct injection can experience induction icing. Quote:
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