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40 votes
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Why do aircraft with turboprop engine have black painted anti-icing system?

These are rubber boot deicing systems. When ice forms on the leading edge of a wing, pressurized air is used to inflate the boot so the ice will pop off. Normally, this inflation is not permanent but ...
Peter Kämpf's user avatar
31 votes

Do missiles need anti-icing?

In a history of NASA's Icing Research Tunnel, "We Freeze to Please," NASA SP-2002-4226, Fig. 5-2 shows Hellfire missiles being tested. But it conspicuously mentions nothing about de-icing ...
Camille Goudeseune's user avatar
28 votes
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Why is a 737 Original speed-restricted below 10 kft with inoperative windscreen heating?

To reduce damage in case of a bird strike. The restriction is not only for the 737-100 and -200 models, the 737 NG QRH says: WINDOW HEAT OFF In flight: WINDOWS HEAT switch (affected window) ..... OFF ...
Bianfable's user avatar
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19 votes
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Why is wing anti-ice in transport aircraft not required below -40 degrees Celsius?

That -40 is SAT and in degrees Celsius. The reason that anti-ice is generally no longer needed below that temperature is because at that point, the air is so dry that there isn't enough moisture left ...
Ralph J's user avatar
  • 51.9k
19 votes

Why is engine anti-ice used only until -40 for climb and cruise, but at all temperatures in descent?

The idea is that at SAT colder than -40, it's "too cold for ice to form." (That is itself a long discussion, but that's the conclusion the rule is based on.) In cruise below -40 SAT, you don'...
Ralph J's user avatar
  • 51.9k
18 votes

Why do aircraft with turboprop engine have black painted anti-icing system?

They're not painted black, but a rubber (hence black) device called a de-icing boot. Upon entering icing conditions, the system once activated will repeatedly inflate and deflate the rubber boots. ...
Sanchises's user avatar
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16 votes
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Why not have Pitot Heat always on?

I can generally only speak for commercial aviation. The reasoning is probably the same or similar for General Aviation, but seeing as that is such a wide and varied field, with a tremendous number of ...
Frank's user avatar
  • 2,403
16 votes
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What does the word "boot" mean?

Versalog already told the core of the thing. Most prop aircraft which are approved for flights into known icing conditions have such boots to remove the ice from the wings leading edge. Those boots ...
pcfreakxx's user avatar
  • 1,988
16 votes

Why do aircraft with turboprop engine have black painted anti-icing system?

As the other answers have already pointed out these black areas are not painted, they are rubber surfaces that are inflatable to break off any ice that forms on them. To produce rubber you need a ...
YPOC's user avatar
  • 263
13 votes

Do missiles need anti-icing?

Do missiles need anti-icing? Apparently not, because they have no provision for that. At least none of the USAF/NATO missiles I've ever seen. And it wouldn't be just missiles, but bombs as well. The ...
WPNSGuy's user avatar
  • 9,228
12 votes
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What do the pilots do if the plane they are operating does not have an anti-ice system?

If an aircraft is not equipped with anti-ice or de-icing systems, than the answer is simple: You don't fly into icing conditions. This is usually listed as an operating limitation in the POH/AFM/FCOM ...
Bianfable's user avatar
  • 56.9k
12 votes

What does the word "boot" mean?

Find a picture of any WWII bomber or any modern Cessna Caravan and there should be a black stripe along the leading edge of the wing and tail surfaces. That is termed a boot. (Image source) ...
Versalog's user avatar
  • 129
11 votes

What are some Anti-icing solutions for small planes without an on-board system?

Generally light GA aircraft have limited anti ice system, usually limited to just pitot heat. Some newer aircraft have been certified for flight into known icing (FIKI) and make use of chemical ...
Romeo_4808N's user avatar
  • 74.3k
11 votes

What are some Anti-icing solutions for small planes without an on-board system?

There are many things you can do to mitigate the risk of icing, but most involve prevention via avoidance of icing conditions. For example, getting a good weather brief, knowing where the freezing ...
Michael Hall's user avatar
10 votes

Why is engine anti-ice used only until -40 for climb and cruise, but at all temperatures in descent?

-40C has been traditionally defined as the temperature at which you can't encounter water in liquid form (supercooled droplets). (Recent research has found supercooled water as low as -48C, but in any ...
John K's user avatar
  • 132k
8 votes
Accepted

Are pitot systems protected from ice?

You can see an example sketch of a heated pitot tube in the FAA Handbook of Aeronautical Knowledge: As you can see, there are two heaters that heat the entire tube and (ideally) stop ice from forming ...
Bianfable's user avatar
  • 56.9k
7 votes

Why is the B787 one of the few aircraft with electro-thermal wing anti-/de-icing?

The reason is that is is new. The B787 is one of the few recent examples of an aircraft where the engineers were allowed to go back to the drawing board and really innovate. It is therefore one of ...
j-bone's user avatar
  • 71
7 votes

Can a single engine on an A320 provide wing anti ice?

It would probably be a single point of failure if one engine wouldn't be enough to deice both wings. For this reason there is a cross bleed selector so that the remaining engine can feed the wing on ...
Jan's user avatar
  • 2,398
7 votes
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Why are some parts of the wings not protected by the wing anti-ice system in the B737?

There are always two answers to any question about why something is or is not on any particular aircraft: one regards regulation and the other practical application. FAR ยง 25.1419, Ice protection, ...
Pilothead's user avatar
  • 20.9k
7 votes

Do missiles need anti-icing?

No, for mostly the same reasons that fighters don't have specific provision for such systems: altitude, weight and complexity/failure rates. Altitude: icing conditions are only encountered within a ...
Ian Kemp's user avatar
  • 304
6 votes
Accepted

Is anti-icing a small area of the windscreen (hot-plates) adequate for the full flight or only an interim solution?

Those hot plates, in my experience, are useless. The only reason we had one on our PA34 cargo plane was to make it legal for flight into known icing. As far as I'm concerned, the whole and entire ...
acpilot's user avatar
  • 6,016
6 votes

Why not have Pitot Heat always on?

Depends on the airframe and where it is operating. For light aircraft operating a low altitudes (<10,000 ft) pitot heat use is going to be dependent upon whether the pilot anticipates encountering ...
Romeo_4808N's user avatar
  • 74.3k
6 votes

Why we turn off anti-ice first then put on APU bleed after parking?

The SOP calls for ANTI-ICE ... OFF APU BLEED pb-sw ... ON the former covers both wing and engine anti-ice. It is not allowed to use APU bleed for wing anti-icing, ...
busdriver's user avatar
  • 3,725
5 votes

What do the pilots do if the plane they are operating does not have an anti-ice system?

Aircraft such as a Cessna 172 are routinely flown in cold conditions. The regulatory objective is to avoid all known icing conditions. The practical objective is to avoid all likely icing conditions....
mongo's user avatar
  • 17.8k
5 votes

What are some Anti-icing solutions for small planes without an on-board system?

In the end, for a VFR pilot, if there is any chance of running into rain in winter, it's all about the freezing level. The criteria for use of heat anti-icing on jets for departure is visible ...
John K's user avatar
  • 132k
5 votes

Why and how can a fume event occur?

(1) How can can other fluids contaminate the bleed air? Engine Oil: The engine fan and compressor stages are rotating pieces of metal on metal and thus need lubrication. Engine oil is used for this ...
Bianfable's user avatar
  • 56.9k
5 votes

Do missiles need anti-icing?

Missiles, at least the ones in question, do not need anti-icing as much as aircraft do. The typical air-to-air missile has roughly the following mission profile: 0 - 2 seconds: Drop from the pylon or ...
Therac's user avatar
  • 27.9k
4 votes
Accepted

Topics for high school chemistry project (IB Chemistry IA)?

I'd do aluminum corrosion. Long term, it's the number one lurking monster in any airline's back closet. There is interesting chemistry, not just in oxidation processes, but how the different alloy ...
John K's user avatar
  • 132k

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