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JoeSambor
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 Posted: Dec 04, 2006 - 11:42 AM
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Forum Veteran
Joined: Dec 28, 2004 - 05:56 AM
Posts: 751
Status: Offline
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I remember them from Misawa. Stupidest thing I have ever seen. They also required you to be in the intake danger area during engine run, and they were full of bits and pieces that could be ingested. Don't know who dreamed up these turkeys, but I haven't seen or heard of one in a while.
Best Regards, |
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Joe Sambor
LM Aero Field Service Engineer
Woensdrecht Logistics Center, The Netherlands
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Sponsor
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 Posted: May 21, 2013 - 9:10 PM
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F-16.net Sponsor
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testcell113th
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Posted: Dec 20, 2006 - 12:46 AM
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Enthusiast
Joined: Apr 06, 2004 - 05:00 AM
Posts: 25
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| Ice damage to F-16 engine blades is considered FOD, but I believe the correct terminology is called Rime Ice. We had a blade that bent backwards and was perfectly smooth, we were lucky that is all it did. |
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leaver2000
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Posted: Nov 21, 2011 - 01:09 PM
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Newbie
Joined: Nov 21, 2011 - 01:02 PM
Posts: 1
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I'm a weather forcaster out at Osan AB. The criteria for us to issue this advisory is a temp of 05C or lower and a dewpoint depression of 05C or less.
Dewpoint depression is the diffrence between the air temp and dew point. IE: if your temp is 05C with a dew point of 03C your dew point depression is 2C and would require the ICE FOD advisory to be issued.
I found it odd that we have to issue the advisory even tho temps are not freezing, is it common for the air entering the intake to cool that drasticly from 05C-00C?
our regs say that it is "possible" with a temp of 05C and a DPD of 05C, i would imagine it being most common with freezing temps and 100% saturated air, 0C DPD.
LEAVERSMASH! |
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That_Engine_Guy
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Posted: Nov 24, 2011 - 03:04 AM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2198
Location: Under the engine somewhere.
Status: Offline
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leaver2000 wrote:
I found it odd that we have to issue the advisory even tho temps are not freezing, is it common for the air entering the intake to cool that drasticly from 05C-00C?
our regs say that it is "possible" with a temp of 05C and a DPD of 05C, i would imagine it being most common with freezing temps and 100% saturated air, 0C DPD.
Yes it is possible to create inlet/intake ice with an OAT above freezing; here is why.
When air is drawn into the inlet/intake, the pressure drops as the velocity of the air increases. This causes the temperature of the inlet air to drop.
So at 5*C (41*F) air being sucked into a jet engine can loose enough temperature to begin forming ice.
The rapid drop in pressure inside the inlet often produces condensation as well. (Which makes the situation real bad when you combine it with the lowered temperature) You can see this very often when the dew points are high, or near to the air temperature.
REF: http://www.youtube.com/watch?v=SUKCp4pK5LY
F-16s often produce an inlet vortex that causes 'visible' moisture.
REF: http://www.youtube.com/watch?v=BYkW5KwqUOA
Ask Brother Gums about inlet ice.... 
Keep 'em flyin' 
TEG |
_________________
[Airplanes are] near perfect, all they lack is the ability to forgive.
— Richard Collins
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