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Flying on a Boeing jet?
On 2/24/2021 10:59 AM, Wayne B wrote:
On Wed, 24 Feb 2021 10:22:46 -0500, "Mr. Luddite" wrote: On 2/22/2021 7:54 PM, Wayne B wrote: On Mon, 22 Feb 2021 19:08:43 -0500, wrote: On Mon, 22 Feb 2021 10:08:12 -0500, Keyser Söze wrote: On 2/22/21 9:58 AM, wrote: On Mon, 22 Feb 2021 09:13:56 -0500, Keyser Söze wrote: Good luck and don't forget your parachute. Sheesh. Since Boeing doesn't make engines and the Pratt and Whitney PW4000 is used on Airbus, and McDonald Douglas planes too, maybe you better take the train. Right...the loonytarian response...Boeing doesn't make the engines, so it isn't responsible. What failed? Boeing didn't make that engine, they come in assembled and installed as a FRU Perhaps you should be blaming United airlines for sloppy inspections. === The engine was made by Pratt and Whitney, as are about 9% of the other Boeing 777s. The other engines are made by Rolls Royce and GE, and are not known to have any issues. Supposedly the FAA sactioned Pratt and Whitney a few years back for not providing their engine inspectors with sufficient training. The good news is that the plane landed OK and no one on the ground was injured. There were some pretty big chunks that fell on those houses. Many years ago (back in the early 80's) I was involved with the design of a vacuum deposition system that deposited thin film strain gauges and thermocouples on P&W jet engine turbine blades. It was for real time testing of turbine blade designs. I visited the P&W facility in Florida after the system was delivered and installed and was given a plant tour. One room had a number of people seated at tables who were physically handling turbine blades from bins at each table. My host explained that they were all visually handicapped or blind and were using their sensitized sense of feel to inspect the blades, feeling them for inclusions or other irregularities in the blade surfaces. === Interesting, and a bit counter intuitive. How do you get an electrical connection to a strain gauge that is rotating at high speed? The "leads" from the sensors were also thin film deposited connections to the shaft through the "root" of the turbine blade. The root is the mechanical connection to the shaft. I assume (don't know for sure) that some sort of slip rings were used to send TC and strain gauge data to the instrumentation. -- This email has been checked for viruses by AVG. https://www.avg.com |
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