Originally posted by Wolfala I remember reading a nugget somewhere that the 747 actually had the best g/r around - anyone got data?
Originally posted by Kev367th Not sure about that, but I remember reading an air incident report where a 747 pilot performed an aileron roll after losing an engine and screwing up the procedures. (poss Air China)Correction to my origianl post - Not an A320, an A330.
The crew of a China Airlines 747SP on a 1985 flight over the Pacific to Los Angeles was luckier. At 41,000 feet the number four engine experienced a compressor stall. After it was shut down, the autopilot began compensating for the yaw created by the asymmetric thrust from the remaining three engines. However, the yaw pushed the aircraft into a roll. Over the next two minutes, the airplane plummeted 32,000 feet (about six miles), rolling some 60 degrees to the right with the noise pointed nearly straight down. The crew throttled the remaining three engines to idle power and pulled back on the yoke. Passing through 30,000 feet, at some 295 knots indicated airspeed (the 747SP has a design maneuvering airspeed, Va, of some 230 knots IAS), the captain was pulling 5 G's on the airplane, and the stresses literally were pulling pieces off. Fortunately, he was able to pull the airplane out of the dive at 9,500 feet. The much-relieved crew climbed back to 27,000 ft. and limped to a diversionary landing at San Francisco. Post-incident inspection revealed loss of the entire left elevator, most of the right elevator and the outer 30-32 feet of the horizontal stabilizer. Reportedly, the auxiliary power unit (APU) mounted in the tail had been ripped off the airplane under the high G loading and today rests at the bottom of the Pacific Ocean.
Originally posted by Angus 15 to 1 ????You sure about that?A normal light aircraft glides easily, - at 8 to 1 or so.
Newsgroups: sci.aeronautics.airliners,rec.travel.airFrom: drinkard@bcstec.ca.boeing.com (Terrell D. Drinkard)Subject: Re: unpowered glide ratiosDate: 19 Sep 94 01:28:35In article ,Thomas Sloane wrote:>>For some Boeing planes, or others, what are typical,>unpowered, sustainable glide ratios?Just in general, one can assume a glide ratio in excess of 20 to 1.The 737 is around 22 to 1, depending on the exact model and configuration.This is assuming the engines are at idle, or at least windmilling. It doesget worse if they are not turning at all.Terry--Terrydrinkard@bcstec.ca.boeing.com