Questions tagged [anti-ice]

Systems that aim to prevent ice from forming on the outer surface of an aircraft, especially the wings, engine intakes, windows, and propellers (as applicable).

Filter by
Sorted by
Tagged with
0
votes
0answers
51 views

Airbus A321 CFM56 Engine - Engine Anti-Ice Valve

For Airbus A321 - CFM56 engine, is there any maintenance task or trouble shooting procedure that require to removal Engine Anti-Ice valve and its hose? (except remove engine and remove the valve ...
0
votes
2answers
242 views

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

Anti-icing equipment is designed to prevent the formation of ice, while deicing equipment is designed to remove ice once it has formed. These systems protect the leading edge of wing and tail surfaces,...
1
vote
0answers
48 views

Why did the dividing wall separating the engine intakes of early twin-engine Westland Wessexes cause difficulties with intake anti-icing?

The Rolls-Royce1 Gnome-engined variants of the Westland Wessex helicopter family (i.e., the twin-engined versions)2 draw air for both engines from a common intake (having been designed prior to the ...
4
votes
2answers
245 views

Why don't we use hydrophobic (icephobic) coatings over traditional anti-ice methods?

I am a design engineer on GA aircraft and I had a thought whilst flying in icing conditions the other day. I know there are lots of ways we deal with ice buildup (as per the chart below from this post,...
4
votes
2answers
403 views

What is the impact of thermal Anti-Ice on descent performance?

I am just another one of the passionate flight simmers trying to understand more about Anti-ice system mechanics. I am talking about the Boeing 737-800 here if it makes a difference. What bothers me ...
15
votes
1answer
4k views

Why is a 737 Original speed-restricted below 10 kft with inoperative windscreen heating?

According to this page on the 737's operational limitations, the Original 737s (737-100/-200) are limited to 250 KIAS below 10 kilofeet if the windscreen-heating system is inoperative: Anti-Ice & ...
3
votes
1answer
712 views

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

I have to do an IB Chemistry IA and I wanted to relate it somehow to aviation; however, I can't do anything super complicated though because I'm only a high schooler. Here are some possible topics ...
5
votes
4answers
3k views

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

When flying during the winter, is there anything I can do to increase my margin of safety, such as anti-icing fluid? I've heard of people spraying their aircraft with propylene glycol, but am curious ...
6
votes
1answer
947 views

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

Can a single engine on an A320 provide wing anti ice for both wings in the air ?
2
votes
1answer
219 views

Why and how can a fume event occur?

« A fume event occurs when bleed air used for cabin pressurization and air conditioning in a pressurized aircraft is contaminated by fluids such as engine oil, hydraulic fluid, anti-icing fluid, ...
2
votes
2answers
173 views

Are there requirements for ice protection for general-aviation aircraft?

Does anyone know if any regulations exist making it a requirement for general aviation aircraft to have ice protection systems? And any insights on why general aviation aircraft tend to use rubber ...
1
vote
4answers
616 views

Who else is using electro-thermal wing anti-/de-icing apart from the 787?

I am researching into deicing technologies for the future, but apart from Boeing with Ultra/GKN, no one seems to be picking this technology up and being competitive. Any one know why this is? Is it an ...
1
vote
1answer
1k views

Could someone please explain why the A320 doesn’t have an anti ice system for its vertical and horizontal stabilisers? [duplicate]

I had come across in the FCOM that there is no anti ice system for the vertical and horizontal stabilisers while looking at the schematic diagram. I find it very strange that the other surfaces on the ...
3
votes
2answers
247 views

Does contra-rotating vs regular propellers, have any effect on icing?

I am trying to understand whether can there be any correlation between the contra-rotating propellers and the ice accretion over the wing ? For instance, is there any evidence that ice accretion is ...
7
votes
1answer
3k views

Why can't we use APU bleed air for wing anti ice on the A320?

The question says it all. While reading I came across this that we can under no circumstances use APU bleed air for supplying wing anti ice? Any reason?
5
votes
1answer
251 views

What is the most critical takeoff shear margin condition for a Type IV anti-ice fluid?

Type II and the more common Type IV anti-ice fluids use non-Newtonian thickening agents so that they can stay put during ground operations, yet shear stresses on the fluid during the takeoff roll ...
13
votes
2answers
5k views

What does the word “boot” mean?

I found this word "boot" in one book. The chapter was connected with ICING operations, and I found this word with little explanation: A tube bonded to a surface, e.g. wing edge. When pressurized ...
4
votes
1answer
269 views

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

I asked this question about what "the thing on the windscreen of some Piper aircraft is". It came out that it is used as small anti-icing. The user Jules asked following in a comment of an answer: ...
12
votes
1answer
3k views

Why is wing anti-ice in transport aircraft not required below -40 degrees Celsius?

Okay, this confuses me. As it gets colder doesn't it mean more possibility of icing? And is the -40 degrees SAT or TAT?
17
votes
3answers
12k views

Why not have Pitot Heat always on?

Most (all?) aircraft have a Pitot Heat Switch which must be turned on in certain conditions. Seems Pitot Heat is one of those things you don't want to forget to switch on when it's needed, or worse, ...
4
votes
1answer
181 views

Do wing warmers exist?

In moto racing, they use tire warmer to keep tires hot when the tire is not running. In particular weather conditions (e.g. heavy snow), aircraft require de-icing operation after staying parked for ...
5
votes
1answer
3k views

Why are the leading edges of the 787's horizontal and vertical stabilizers not painted?

The other day I made a question about the engine painting and why it isn't painted at the front part. The answer was: to facilitate anti-ice system. Source: fervegeon.com So perhaps the leading ...
8
votes
1answer
315 views

Can IPA be used as a FSII with MoGas, particularly with a Peterson STC?

This question established a basis for the use of 100% Isopropyl Alcohol (IPA) as a Fuel System Icing Inhibitor (FSII) in aviation gasoline systems. However, this Cessna Service Letter documents that ...
1
vote
1answer
216 views

What is the process to remove frost off an airliner? [duplicate]

My aunt recently was going on a flight home and she boarded the flight, but her flight was delayed due to frost on the aircraft. She noticed this crane like device above the aircraft wing during the ...
8
votes
1answer
1k views

When to turn on deice boots?

This video says (at 25:06) that you should do it as soon as possible. but I just learned in class that you should wait for an ice build up then turn it on vs just turning it on. This would prevent an ...
3
votes
3answers
4k views

What common forms of deice and anti-ice exist and what future alternatives are being researched?

For the leading edges of aircraft's flight surfaces, there are a few more common deice and anti-ice methods available. What are the most common systems? What are the alternatives? Is there any ...
7
votes
2answers
17k views

What is the difference between deice and anti-ice?

Most aircraft contain systems which are used to mitigate problems which could be caused by ice. This includes everything from a heated pitot tube to a wing leading edge heated by bleed air. These ...
11
votes
3answers
2k views

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

While I was searching for a listing of aircraft with different anti-/de-icing methods - especially for electro-thermal wing anti-ice - I couldn't find any information about other aircraft except the ...
18
votes
3answers
16k views

How do large airliners de-ice in flight?

How do large airliners de-ice their surfaces in midair? In smaller planes like the ATR or the caravan there are deicing boots as per picture: How is this achieved on bigger aircraft, as there seems ...
5
votes
3answers
2k views

What were to happen if deicing fluid went in to the jet-engine?

What were to happen if deicing fluid went in to an engine. I have heard that deicing fluid is somewhat flammable. What were to happen if it went in to the engine? Would it combust like fuel?
15
votes
3answers
6k views

Why is bleed air taken from some stage of the compressor used for de-icing? Why not e.g. exhaust gas?

In the answers to this question, it is said that The de-icing system on most turbine aircraft (including MD-82 involved in that accident) uses bleed air from the engines, that is it extracts some ...
4
votes
2answers
331 views

Why are CJ2+ Anti-Ice & De-Ice Systems separately controlled?

Why are the CJ2+ anti-ice and de-ice systems separately controlled? Wouldn't it be easier for both systems to be controlled with one button/switch (minimize chance of error from occurring)? Are there ...
8
votes
2answers
10k views

What do they use to de-ice aircraft and runways on snowy days?

One of the answers to this question mentions how runways are usually in need of de-icing on cold days (which makes sense), and as anyone who has ridden an airplane on a cold day knows, planes need de-...
18
votes
2answers
6k views

Why is the de-icing fluid sprayed on jets coloured orange?

On a cold night or if it's been snowing, jets are sprayed with orange de-icing fluid: But why is it orange? If it's to see where's been sprayed and where you've missed a bit, black would be the most ...
9
votes
1answer
14k views

What are the different kinds of de-ice fluid?

When frost adheres to the airplane or it is snowing, you need to make sure the airplane is clean when you depart. You've probably seen the trucks spraying aircraft in the winter before departure, but ...
13
votes
2answers
4k views

Why do only some aircraft require tail anti-icing?

Why do some aircraft require anti-icing on the tail while others (Dassault Falcon Jets, Boeing 737, 747, etc.) don't?