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Robert Moore wrote:
Dudley Henriques wrote Coffin corner is the area behind the curve where sink rate can't be stopped with power but requires reduction in angle of attack. For a perfect example of an aircraft in coffin corner, see the Edwards AFB accident involving a young AF pilot who got his F100 so deep into coffin corner behind the curve he couldn't recover the airplane; not enough air under him to reduce the angle of attack. He applied full burner but couldn't fly it out on power alone. Reduction of angle of attack was what he needed and he didn't have the room. THIS is the definition of coffin corner and it most certainly IS in the area of reverse command. You're kidding, right? Better stick to light plane flight instructing Dudley. I sure don't see the F-100 pilot anywhere near critical mach speed. THAT was NOT a case of "coffin corner". From Wikipedia, the free encyclopedia Coffin corner (aviation) The coffin corner or Q-Corner is the altitude at or near which an aircraft's stall speed is equal to the critical Mach number, at a given gross weight and G loading. At this altitude the aircraft becomes nearly impossible to keep in stable flight. Since the stall speed is the minimum speed required to maintain level flight, any reduction in speed will cause the airplane to stall and lose altitude. Since the critical Mach number is maximum speed at which air can travel over the wings without losing lift to flow separation and shock waves, any increase in speed will cause the airplane to lose lift, or to pitch heavily nose- down, and lose altitude. The "corner" refers to the triangular shape at the top of a flight envelope chart where the stall speed and critical Mach number lines come together. Some aircraft, such as the Lockheed U- 2, routinely operate in the "coffin corner", which demands great skill from their pilots.[1] From Wikipedia, the free encyclopedia Slow flight Slow flight is a portion of an airplane's performance envelope above the speed at which the plane will stall, but below the aircraft's endurance speed. This part of the performance chart is also known as "the back side of the power curve" because when flying in this area, more power is required in order to go slower and still maintain straight and level flight. A large angle of attack is required in order to maintain the altitude of the aircraft. Bob Moore For God's sake Moore, try actually READING these posts before shooting off your mouth once in a while. Our mutual dislike for each other is legendary by now. As usual, you are beating a dead horse here. Coffin corner is explained in full in several posts above. The use of the term is correct in BOTH instances! -- Dudley Henriques |
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