tailieunhanh - Aircraft icing

Máy bay icing Giới thiệu Cố vấn an toàn bao gồm: • Đóng băng tai nạn thống kê • Kết cấu băng • Tailplane đóng băng • làm tan băng và thiết bị chống đóng băng • Ice chiến lược và chiến thuật bay • băng hệ thống cảm ứng | S A F E T Y ADVISOR Weather No. 1 Aircraft Icing Introduction This Safety Advisor covers Icing accident statistics Structural ice Tailplane icing Deicing and anti-icing equipment Ice flying strategies and tactics Induction system ice When ice is encountered immediately start working to get out of it. Unless the condition is freezing rain or freezing drizzle it rarely requires fast action and certainly never panic action but it does call for positive action. C - Capt. Robert Buck Why Ice Is Bad Ice in flight is bad news. It destroys the smooth flow of air increasing drag while decreasing the ability of the airfoil to create lift. The actual weight of ice on an airplane is insignificant when compared to the airflow disruption it causes. As power is added to compensate for the additional drag and the nose is lifted to maintain altitude the angle of attack is increased allowing the underside of the wings and fuselage to accumulate additional ice. Ice accumulates on every exposed frontal surface of the airplane not just on the wings propeller and windshield but also on the antennas vents intakes and cowlings. It builds in flight where no heat or boots can reach it. It can cause antennas to vibrate so severely that they break. In moderate to severe conditions a light aircraft can become so iced up that continued flight is impossible. The airplane may stall at much higher speeds and lower angles of attack than normal. It can roll or pitch uncontrollably and recovery might be impossible. Ice can also cause engine stoppage by either icing up the carburetor or in the case of a fuel-injected engine blocking the engine s air source. Sponsored by the FAA Flight Safety Branch Kinds of Ice and Their Effects on Flight Structural ice is the stuff that sticks to the outside of the airplane. It is described as rime clear sometimes called glaze or mixed. Rime ice has a rough milky white appearance and generally follows the contours of the surface. Much of it can be removed by deice .