Aviation personnel involved in the accident were being debriefed. The 48-hour stand down started Tuesday night, the Independent Record newspaper reported. Minor injuries were reported among the five agency personnel aboard the Bell UH-1H (Huey) helicopter that crashed near a roadway while involved in a fire east of Townsend. Numerous major blazes ignited across central and southern Montana. The sidelining of the state Department of Natural Resources Conservation fleet of seven helicopters and three fixed-wing aircraft comes as Montana’s fire season grew dramatically more severe this week. We'll cover this signature maneuver next.BILLINGS - A Montana firefighting agency imposed a 48-hour stand-down of all its aircraft after a helicopter crash landed and burned in heavy winds. To compensate, the pilot will continue to push the cyclic forward to keep the helicopter flying in that direction with increasing airspeed.Ī helicopter that is flying forward can stop in mid-air and begin hovering very quickly. In response, the rotor will try to lift up and slow the aircraft automatically. He or she also feels a shudder in the rotor system as the helicopter begins to fly out of rotor wash (the turbulence created by a helicopter's rotor) and into clean air. At this point, known as effective translational lift, or ETL, the pilot eases up on the left foot pedal and moves closer to a neutral setting. When the aircraft reaches about 15 to 20 knots of forward airspeed, it begins to transition from hovering flight to full forward flight. The unbalanced lift causes the helicopter to tip forward and move in that direction.This increases the angle of attack - and creates lift - at the back of the helicopter.The rotor blades are pitched lower in the front of the rotor assembly than behind it.The swash plates tilt forward at an amount equal to the input.That input is transmitted to the lower swash plate and then to the upper swash plate.First, he or she nudges the cyclic lever forward.
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