A Jet Engine Failure In The Takeoff Roll Is Usually Caused By What Event?

Question

Although it is rare now, there used to be incidents of jet engines of commercial aircraft failing in the takeoff roll, causing accidents, anyone know why ?

other than Birds "Spark" cheers. Duh

Answer 1

Earlier turbine engines were unreliable due to lack of knowledge at the time about fatigue issues that resulted in significant amounts of failures of compressor/power turbine blades and disks. All aircraft are certified to be able to climb away following engine failure at the worst possible point in take-off, firstly this wasn't always the case for very early jet aircraft and secondly when a turbine breaks apart the metal in the earlier engines would rip through the fuselage and or wing and in a number of occasions sever critical controls or systems (take for example the Sioux City Iowa accident) The reason it occurs during the take-off roll is the engine is developing its maximum thrust so the forces and temperatures in the engine are significantly higher than in cruise or climb. So if it is going to go, it is more likely to go then.
Modern aircraft have much more robust design with very exotic materials in some cases and as a result compressor failures are rare, but they do happen. all new engines must be able to withstand that failure and retain all the engine parts within the casing, and aircraft systems have to be sufficiently segregated that if it does escape not all systems are lost (known as rotorburst criteria) so we do not have loss of system issues.

Answer 2

Takeoff distance is decided by a wide variety of factors. One of the biggest factors is weight. Both your flights were probably taking off very heavy since you were flying across the country and carrying a lot of fuel. That will take a longer time to accelerate and have enough speed for the wings to create lift for takeoff. There are strict requirements for every flight as far as having enough distance to takeoff. These calculations are done before leaving the gate and the numbers are put into the airplanes on board computers to ensure your safety. One other thing that also probably caused a longer takeoff roll is that airlines are not always required to run there engines at 100% power during takeoff. This can save fuel and drastically reduce engine wear saving millions of dollars a year. If the calculations show they can depart safely at a lower power setting they will.

Answer 3

There can be lots of reasons why they fail. Among them, taking in birds, an engine stall, malfunctioning fuel system components, etc. You can also have engine fires or overheats.

Typically, they don't cause accidents. Obstacle clearance planning is all based on being able to avoid all obstacles within the climbout path with an engine inoperative. Furthermore, all of the speeds that we do things at are specifically designed to compensate for an engine failure. Furthermore, pilots train for this in their simulator sessions all the time.

Answer 4

Engines not allowed to warm up to tail pipe temp causing a stall when full power applied was common in the 50's and 60's . this disappeared with the advent of the turbo fan engines the earlier engines were axial flow and the combustion chamber was connected to the exhaust nozzle and required a hot enough temp to ignite unburned fuel. Otherwise a large amount of fuel such as in the full power mode would flood the engine causing a stall. Another common failure was blade failure as the metals back then weren't as good as the alloys developed in the late 60's on.

Answer 5

I don't believe that there is a definite cause for the engines to fail on the takeoff roll, there could be many different factors. If you go onto the NTSB website: http://www.ntsb.gov/ntsb/query.asp
you can search probable causes for different accidents.

Answer 6

ice especially plains with the engine above the rear wings md-80 even summer descend so fast don't notice sometimes you can have ice seen some airlines put pieces of yarn on top the wing cheap easy look for ice

Answer 7

compressor stall was common on early jet engines when the power levers were advanced to quickly.

Answer 8

Birds.

Answer 9

it's teh muslims