Search found 4 matches

by Aerospice
Wed Sep 25, 2019 10:36 pm
Forum: Civil Aviation
Topic: Reuters: Tim Clark: won't take new planes unless engines are truly ready
Replies: 284
Views: 38766

Re: Reuters: Tim Clark: won't take new planes unless engines are truly ready

I forget the year, but before sometime in the 1980s, high sulfer testing was just ordering a few tankers of LAX jet fuel (the refinery was buying high sulfer fuel), so RR may never have had a test until the EU mandated really low limits. Pratt along the way started having sulfer added to fuel per s...

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by Aerospice
Tue Sep 10, 2019 10:18 pm
Forum: Civil Aviation
Topic: Reuters: Tim Clark: won't take new planes unless engines are truly ready
Replies: 284
Views: 38766

Re: Reuters: Tim Clark: won't take new planes unless engines are truly ready

RR skipped high sulfer fuel testing. A standard test at Pratt. This is on RR. The sand wear is due to pushing existing compressor design rules and pushing efficiency by reducing the compressor FOD bleed. A poor design decision. GE, CFM, and T700 set the global standards. Pratt performed hot/ high t...

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by Aerospice
Sun Feb 17, 2019 11:11 pm
Forum: Technical/Operations
Topic: Future engine improvements
Replies: 32
Views: 3344

Re: Future engine improvements

On the Trent 1000's these kind of things have been causing high levels of maintenance, with many planes sitting for weeks. Is that a cost the airlines want to bear for a 2% improvement. Unlikely. There is a coming period where engines will settle into a lull until the tech matures and the bugs get ...

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by Aerospice
Fri Dec 07, 2018 10:03 pm
Forum: Technical/Operations
Topic: GTF vs. triple spool engines
Replies: 33
Views: 2979

Re: GTF vs. triple spool engines

Hi, the Advance engine is a triple spool, the Ultrafan is the 2.5 spool, 2.5 spool refers to the two HP and IP spools plus a stubby LP spool between the fan and gearbox. The reasons why RR are dropping the triple spool are described about 1/3rd the way down this: https://www.aerosociety.com/news/pio...

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