Does anybody know if it's possible to de-ice an engine in-flight by injecting de-icing fluid into it? I hear about this today, but not sure if it's true. This was supposedly done by an IB MD-80 landing at ARN yesterday.
Actually, propeller alcohol fluid deicing is still used on some models of light aircraft....and on the wing as well. The TKS system works quite well.
Jet engines use bleed air for anti-ice. However, it must be switched on in time otherwise it's DEICE time....with surprising results.
Hot air on every case I know of. Some cowling inlets will use a boot (Dash 8 for one) for de ice, but even these are of course pneumatically operated. Any fluid going into the inlet would be for water injection purposes.
All of the heavy commercial jets I know of use bleed air for de-ice. DC-9 has 3 valves mounted on each engine from the compressor, and the same duct that feeds the packs also delivers air to the wing and tail systems. The 3 valves on the engine route air to the inlet guide vanes and the fuel heater.
Hey Jet, long time no see...metwrench is taking a jab at the PT-6...long time Garrett guy that one is...
Yet one more advantage to the PT-6, Metwrench, is that it doesn't need anti-ice on the inlet to the engine. That's what you get when you are smart enough to put the inlet inside of the cowling where it is protected from ice.. and FOD.. and flame-out from turning on your anti-ice... need I go on...Garretts.. ha.. such a silly little engine.
I know it's hard to believe Jet, but they actually branded me a trouble maker. Little ol me? So, tough as it is, I am trying to be a little less "antagonistic" at least in the tech and civil forums. Those weenies in non-av still get to "feel my wrath" when they say something stupid, but I enjoy the rest of the site so I am trying to behave myself....it's tough...
Why not just put the inlet up front and do away with all those ice deflectors, actuators and ducts? Build a motor with enough steam to extract some "hot" bleed air to anti-ice the inlet in the first pace?
Oh! Silly me! Someone already did it! It's called a Garrett!