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De-icing Fluid Types  
User currently offlineCYEGsTankers From Canada, joined Oct 2004, 245 posts, RR: 1
Posted (10 years 3 weeks 6 days 17 hours ago) and read 8119 times:

What are the differences between type 1 and 4 de-icing fluids? Are they "both" detectable in a photograph?
What is the fluid used here?
Richard

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Photo © Richard Barsby - Aviation Photography CYEG



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User currently offlineKaddyuk From Wallis and Futuna, joined Nov 2001, 4126 posts, RR: 25
Reply 1, posted (10 years 3 weeks 6 days 17 hours ago) and read 8090 times:

Wrong forum for this buddy  Smile

At a guess (I have been told before but cant remember)

The difference is in their operating temperatures....



Whoever said "laughter is the best medicine" never had Gonorrhea
User currently offlineCancidas From Poland, joined Jul 2003, 4112 posts, RR: 11
Reply 2, posted (10 years 3 weeks 6 days 15 hours ago) and read 8054 times:

type 1 is used for de-icing. type 4 is used for anti-icing. simply, type 4 has a higher viscocity so that it will stay adhered to the wing for longer periods of time (usually until 80 kts) so that ice and snow do not accumulate. type 1 is very thin compared to type 4, so it's just used to get ice and snow off the plane.


"...cannot the kingdom of salvation take me home."
User currently offlineCYLW From Canada, joined Apr 2000, 438 posts, RR: 0
Reply 3, posted (10 years 3 weeks 5 days 14 hours ago) and read 7746 times:

Some more differences:

Type 1: Applied HOT (around 180F), pink in color
Type 4: Not heated, green in color

Type 4 must be applied to a clean (not contaminated by snow, ice) surface. You can not put Type 4 on a contaminated surface, you need to de-ice first.



User currently offlineSkydrolboy From Canada, joined Sep 2003, 341 posts, RR: 2
Reply 4, posted (10 years 3 weeks 5 days 13 hours ago) and read 7739 times:

The Type one my company uses is applied at 140F and is orange

User currently offlineGeoffm From United Kingdom, joined Feb 2004, 2111 posts, RR: 6
Reply 5, posted (10 years 3 weeks 5 days 5 hours ago) and read 7716 times:

The one and only time a plane I've been on, being de-iced was at HAJ. We got to the edge of the apron, about to go onto the taxiway to the runway, no holding or waiting for ATC clearance, yet they sprayed us with a viscous, blue gel just before entering the runway. As Cancidas says, it blew off once we got up to speed.

So if we weren't iced up (there was snow and ice on the ground BTW, temps probably at or slightly below freezing), why only use type 4 when we'd been cleared to take off?

Geoff M.


User currently offlineCYLW From Canada, joined Apr 2000, 438 posts, RR: 0
Reply 6, posted (10 years 3 weeks 5 days ago) and read 7709 times:

So if we weren't iced up (there was snow and ice on the ground BTW, temps probably at or slightly below freezing), why only use type 4 when we'd been cleared to take off?

That seems very strange to me. When I did de-icing we had to apply Type 1 then immediately Type 4 to the surface in question. Type 4 is pretty expensive stuff too, and we would only use it when it was snowing pretty bad to achieve a longer hold-over time.

What would be the point of applying anti-ice fluid for the minute it takes to become airborne??

This fluid must have been some other type of DE-ICE fluid. Maybe the colors are different in Europe??

I've heard of some airlines applying Type 4 when a plane overnights so theres no frost on the airplane in the morning.




User currently offlineL-188 From United States of America, joined Jul 1999, 29812 posts, RR: 58
Reply 7, posted (10 years 3 weeks 4 days 19 hours ago) and read 7687 times:

I only use the colors that CYFL as a general rule of thumb. I don't believe there is a color standard for de-ice fluids like there is for coloring Avgas for type.

Goeffmm, What was the humidity? Some charts recommend anti-ice above freezing for any number of reasons. Including moisture on the wing adiabatically (Damm inop spell checker  Pissed ) as the plane climbs.



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineMD11Engineer From Germany, joined Oct 2003, 14127 posts, RR: 62
Reply 8, posted (10 years 3 weeks 4 days 19 hours ago) and read 7684 times:

Don´t forget about fuel temperature. If the plane came in after a long cruise at altitude, the remaining fuel in the wings will be supercooled. Moisture from the air will condense and freeze on the wing, often as clear ice, only detectable by feeling.

We use Killfrost Type 2 in a 75/25 percent mix with water both for deicing and anti-icing. It has a slightly jelly-like consistency and is applied at about 80°C.

Jan


User currently offlineL-188 From United States of America, joined Jul 1999, 29812 posts, RR: 58
Reply 9, posted (10 years 3 weeks 4 days 18 hours ago) and read 7679 times:

Damm. Forgot about that MD11.

And I should have known better. When I was working at Alaska a decade ago, anytime an MD80 had a short stop it got deiced due to that.



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineL-188 From United States of America, joined Jul 1999, 29812 posts, RR: 58
Reply 10, posted (10 years 3 weeks 4 days 18 hours ago) and read 7677 times:

Although in my defense I should add that I have never seen that done on a MD-80 with anything other then type 1. Because by definition Type 4 should be used on a clean wing, not one that has been on the ground for 1/2 hour frosting up.

We use mostly type IV on our medivac bird. It lives in the hanger so we spray it down before going outside during precip.



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineGeoffm From United Kingdom, joined Feb 2004, 2111 posts, RR: 6
Reply 11, posted (10 years 3 weeks 4 days 9 hours ago) and read 7653 times:

L-188/MD11, the plane had just come in from Heathrow. Been on the ground for about 45 minutes I think. It was a BD 757 if that makes any difference. Humidity I'm guessing wildly here, but maybe 30-40%.

Geoff M.


User currently offlineMia From United States of America, joined Feb 2004, 876 posts, RR: 1
Reply 12, posted (10 years 3 weeks 2 days 14 hours ago) and read 7621 times:

My friend Will here at FSU speculates they use Natural Ice (NattieLight) to de-ice planes. From personal experience he says it is capable of destroying anything; from liver, to stainless steel.


"Like all great travelers, I have seen more than I remember, and remember more than I have seen."
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