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Commercial A/C De-icing  
User currently offlineCancidas From Poland, joined Jul 2003, 4112 posts, RR: 11
Posted (11 years 2 months 1 week 5 days 21 hours ago) and read 1664 times:

Do commercial A/C have de-icing boots or do they just use heated surfaces?


"...cannot the kingdom of salvation take me home."
6 replies: All unread, jump to last
 
User currently offlineM717 From United States of America, joined Dec 2002, 608 posts, RR: 4
Reply 1, posted (11 years 2 months 1 week 5 days 21 hours ago) and read 1609 times:

"Commercial A/C" covers a very broad range of equipment. As a general statement, most transport jet aircraft (B-737, 757, DC-9, A-320, etc.) use heated surfaces. On the other hand, many turboprop aircraft (DHC-8, ATR-42/72, SF-340, SA-227, BE-1900, etc.) have de-ice boots.

User currently offlineKAUSpilot From United States of America, joined Jan 2002, 1959 posts, RR: 33
Reply 2, posted (11 years 2 months 1 week 5 days 20 hours ago) and read 1620 times:

Both. Some aircraft (mostly smaller turbine aircraft and piston aircraft) use pneumatic de-ice boots which expand and "knock off" layers of ice after they have built up on aircraft leading edge surfaces.

Other aircraft (larger jets) are equipped with a thermal leading edge anti-ice system. Here, hot, high-pressure engine bleed air is routed under leading edge surfaces to prevent the formation of ice. The main advantage of the thermal system is that it can be used in a preventive fashion, whereas it is usually inadvisable to active pneumatic boots until a pre-determined amount of ice has already built up on the aircraft. The disadvantages of thermal systems are that they use a good deal of engine power, because they draw off of air from the compressor sections of the engine, and they usually should not be used on the ground because warping of the aircraft metal can occur due to the relatively high temperatures encountered at ground level compared to cruising altitude.

Still other types of aircraft incorporate liquid ice protection (weeping wing). Basically, in these systems an anti-ice fluid is secreted through tiny pores in the wings. There are also electrically heated de-icing boots where are too energy demanding to use on large surfaces but are commonly found in use on propeller blades.


User currently offlineBoeing4ever From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 2 months 1 week 5 days 15 hours ago) and read 1555 times:

Any photos that show these de-icing boots in detal?

B4e-Forever New Frontiers


User currently offlineAvt007 From Canada, joined Jul 2000, 2132 posts, RR: 5
Reply 4, posted (11 years 2 months 3 days 12 hours ago) and read 1431 times:

Two points from a mtce guy- the air for heated surfaces is regulated to low pressure, approx 30 psi. Boots are ok, but require FAR more mtce than hot leading edges.

User currently offlineL-188 From United States of America, joined Jul 1999, 29800 posts, RR: 58
Reply 5, posted (11 years 2 months 3 days 12 hours ago) and read 1437 times:

Also, consider that the Shorts SC-7 uses a TKS system for the tail surfaces.




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User currently offlineAvt007 From Canada, joined Jul 2000, 2132 posts, RR: 5
Reply 6, posted (11 years 2 months 13 hours ago) and read 1370 times:

OK, I'll bite, what's a TKS system?

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