If there are multiple reasons, please state them. Is there more than one deicing chemical? Can an aircraft receive a "good", "better", "best" in deicing services?
2006-10-11 12:27:18 · 6 answers · asked by rho b 2 in Science & Mathematics ➔ Other - Science
Well, basically planes are deiced so they don't crash. The ice that builds up on the wings can drastically affect it's flight performance, there have even been reports of a plane doing like a backflip when ice was affixed to it's wings. I think there are multiple ways to deice an aircraft, hot water, umm. Sorry, I'm stupid :P. I'll search for aircraft deicing chemicals.
http://www.p2pays.org/ref/01/00574.pdf#search='aircraft%20deicing%20chemicals'
Ah Ha! here it is. You need Adobe Acrobat to read this.
Air Force approved De-Icers:
Propylene glycol, SAE-AMS 1424, “Fluid, Deicing/Anti-icing,
Aircraft, Newtonian-SAE Type I” is the only aircraft deicer approved for purchase by Air Force activities. Existing stocks of
ethylene glycol-based and ethylene glycol, Military Specification
MIL-A-8243D, Type II, deicers may be used until supplies
are depleted, but additional quantities cannot be purchased.
(“Disposition of Ethylene Glycol-based Deicing Chemicals,” HQ
USAF/LGSS message, April 1994).
Runway/Roadway Deicers
The following deicing chemicals are approved for use on runways
and roadways in accordance with Air Force Instruction
32-1045, “Snow And Ice Control,” 7 March 1994. Note: Ethylene
glycol is not approved for use on runway and roadway deicing
I hope I helped!
2006-10-11 12:34:07 · answer #1 · answered by Anonymous · 1⤊ 0⤋
The two reasons are to keep the airfoil shape so that the wing generates lift (doesn't stall), and to make sure the control surfaces, (aileron, flaps, spoilers) do not freeze and lock up.De-icing should be done as soon to takeoff as possible. The icing tales place a certain altitudes while climbing and not frequently at cruising altitude. Some planes have expandable rubber bladders on the wing- the inflate with air and the ice cracks off. Of course you can have different levels of deicing- mostly technique. The chemicals are mostly propylene glycol based.
2006-10-11 12:42:08 · answer #2 · answered by Use another Nickname 2 · 0⤊ 0⤋
You deice aircraft for several reasons:
1. wings with ice on them don't experience the correct lift and the operability of the aircraft is compromised.
2. Icy wings and control surfaces don't function properly.
3. that causes planes to crash.
4. any questions?
2006-10-11 12:30:21 · answer #3 · answered by Been There 4 · 0⤊ 0⤋
To get them off the ground and to keep them in the air.
2006-10-11 12:35:43 · answer #4 · answered by hydroco 3 · 0⤊ 0⤋
If the airplane has ice on it, it can interfere with normal flight.
2006-10-11 12:31:18 · answer #5 · answered by brainster 2 · 0⤊ 0⤋
Weight and freezing up controlls.
...jj
2006-10-11 12:35:02 · answer #6 · answered by johnny j 4 · 0⤊ 0⤋