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All weather jets/deicing


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Probably a dumb question but here it is.  Jets that are supposed to be all weather interceptors or fighter bombers don't appear to have the black rubber deicing boots.  How do they deice their wings and flying surfaces ?

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The temperature due to skin friction usually is sufficient for the leading edge deicing. It usually happened only on approach below 250 KIAS. (I am talking about the F-4 now). We would accelerate to 300 and you could see ice melting away from the intake lips. The pitot boom and compressor inlet guide vanes of the engines could be heated. The pitot boom electrically and the vanes through hot air from the engines. Pitot Heat - on was an item on the descent checklist. Engine De-Icing was to be selected  depending on situation (e.g. when you had to fly though the murk in the winter during an approach)

Both had an amber warning light on the telelight panel when selected. The pitot heat because it was dangerous for anybody to touch it on the ground (more than one crew chief I know could tell me a story...) and it was battery powered, so it would drain it when the engines were shut. The engine de-ice on the other hand had an impact on power output of the engine.

Hope that cleared up your question a bit.

Cheers

Michael

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On 7/7/2020 at 8:35 PM, Steven H. McLain said:

Probably a dumb question but here it is.  Jets that are supposed to be all weather interceptors or fighter bombers don't appear to have the black rubber deicing boots.  How do they deice their wings and flying surfaces ?

not all de-ice is accomplished with rubber boots.    Engine bleed air is very hot and  can be ducted anywhere,  electric heating is also used for de-icing various parts.

 

Cheers, Tony

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6 hours ago, Snowbird3a said:

not all de-ice is accomplished with rubber boots.    Engine bleed air is very hot and  can be ducted anywhere,  electric heating is also used for de-icing various parts.

 

Cheers, Tony

This..

 

Most modern aircraft have electrical or ducted heat systems. As was also noted, ice wont stick to an airframe if it is going above a certain speed so airframe icing is a worry, for the most part, at lower speeds. 

 

 Sean

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