posted on Oct, 22 2017 @ 07:48 AM
originally posted by: carewemust
I think winds that press the plane down onto the runway suddenly are the most dangerous, aren't they?
You rarely get those types of "downburst" winds except in the vicinity of a mature thunderstorm. What the aircraft in the video were dealing with was
a gusty variable direction wind situation. If you are on final approach in a wind with a 40 knot component and the wind suddenly drops to 20, you
uddenly go from an airspeed of, say 130 knots to 110 knots. Since lift depends on airspeed and angle of attack, lift decreases and you
descend. A wind direction shift to the side of 30 degrees gives the same result since the sine of 30 degrees is .500. A 250 ton aircraft can't
accelerate instantly and jet engines take a while to spool up in power. The old Boeing 727 was perhaps the worst. It might take a full 10 seconds from
pushing the thrust levers (throttles) forward to see actual full power. That's one reason you feel the engines at partial power on final approach
almost to touchdown.