OK, some bad info circulating here.
The color of the fluied is based on the chemical contents, AFAIK they do not use a dye in it.
Most fluids today are Propelyne Glycol. Same stuff that they use for those "enviromentally friendly" car antifreezes. I have also seen it listed as an ingredent in a bag of strawberry muffin mix. I think it was a preservative for the berries.
Etheleyne Glycol used to be used, the summer I worked at Alaska that is what they where shooting. This is the green stuff and is chemically simular to the green stuff in your car radiator. Nobody uses this stuff anymore because of enviromental concerns.
's don't spell out specific fluids to be used, just that the aircraft has to be clean, So I have heard of other fluids being used to de-ice aircraft, Isoprypl Alchohol, straight water and believe it or not but Vodka(In Magadan Russia). The hot setup for deicing is actually hot air, no worry about runoff when that is used. Now that being said, I can't picture the FAA approving a set of OPS Specs without limitations as to the type of deicing used.
Type I is the thin stuff, You can vary the mix of Type I and water, 50/50 or 60/40 are typical but most deice trucks have a selector valve to do this. There are tables made for the various holdover times of different mix ratios.
was Type I with a thickening agent. Nobody used that stuff up in Alaska. For one reason it required a 100 knot sheer speed, which means you want the airplane to rotate above that speed, or else you take off with wings contamiated with de-ice fluid rather then ice (Yes, deice fluid is a contaminate too) and you are in just as much trouble as if the aircraft had ice on the wing. That sheer speed limit is why Reeve never used the stuff since the YS
-11 rotate at less then that speed.
Not quite up with Type III and IV
, both came around after I went to the office, but we due use Type IV
where I work now. It is applied straight, not mixed with water, it is bluish in color, not sure if this is a dye job. It is applied to a clean wing and protects it from contamination that may come down while the aircraft is parked.
A very handy property on medivac flights to remote sites in Alaska with no on-airport deice facilities.
OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.