Государственное
Aircraft De-icing Vehicles
жүктеу/скачать 1.29 Mb.
|
- Бұл бет үшін навигация:
- In-flight Icing
- Ex. 4. Do the crossword puzzle. All the words are related to the icing is- sues discussed in this unit.
Aircraft De-icing VehiclesDe-icers spray heated de-icing fluid onto aircraft icy surfaces, which prevents ice from forming on the body of the aircraft while on the ground. Aircraft de-icing vehicles usually consist of a large tanker truck, containing the concentrated de- icing fluid, with a water feed and a cherry picker crane, allowing the operator to spray the entire aircraft in as little time as possible: an entire Boeing 737 can be treated in under 10 minutes by a single de-icing vehicle. A de-icing vehicle treating an American Airlines MD-80 at Syracuse Hancock International Airport, New York In-flight IcingIn-flight icing is a serious hazard. It destroys the smooth flow of air, increas- ing drag, degrading control authority and decreasing the ability of an airfoil to lift. Ice accumulates on every exposed frontal surface of the aircraft – not just on the wings, propeller, and windshield, but also on the antennas, vents, intakes, and cowlings. It builds up in flight where no heat or boots can reach it. It can cause antennas to vibrate so severely that they break. The aircraft may stall at much higher speeds and lower angles of attack than normal. It can roll or pitch uncon- trollably, and recovery may be impossible. Modern airliners are designed to prevent ice buildup on wings, engines, and tails by either routing heated air from jet engines through the leading edges of the wing, tail, and inlets, or on slower aircraft, by use of inflatable rubber 'boots' that expand and break off any accumulated ice. Finally, airline dispatch offices keep watch on weather along the routes of their flights, helping the pilots avoid the worst of in-flight icing conditions. Pilots can also be equipped with an ice detector in order to leave icy areas they have flown into. Ex. 4. Do the crossword puzzle. All the words are related to the icing is- sues discussed in this unit.Across: 2. (n) A loss of compressor performance leading to a reduction in the fuel flow to the engine. 5. (adj) Relating to the surrounding area; outside. 8. (adj) Different from what is usual or expected, especially in a way that is worrying, harmful or not wanted. 11. (adv) The opposite of "sufficiently". 12. (n) What do we call the time for which aircraft anti-icing treatment remains valid? 13. (n) A procedure applied to the aircraft to protect it against icing. жүктеу/скачать 1.29 Mb. Достарыңызбен бөлісу:
|