Transpac787 From United States of America, joined Jul 2007, 3285 posts, RR: 13 Posted (8 years 2 months 2 weeks 2 days 21 hours ago) and read 3183 times:
It took a bit of "practice", but I'm now able to tell the differences between the GE, PW, and RR engines on 747, 757, 767, A330. The 777 though is a whole other story though. For the life of me, I cannot tell the differences between and identify the different types of engines on the 777. So, if anyone has any pointers, things to look for, etc....I'd much appreciate it.
7673mech From United States of America, joined Mar 2004, 797 posts, RR: 2
Reply 2, posted (8 years 2 months 2 weeks 2 days 21 hours ago) and read 3150 times:
Off all aircraft the are least distinguishable.
The GE's the cowlings (fan, T/R - the painted ones) are the shortest. Atleast appear to be. (See BA).
The Pratts - the cowlings are longer but oval. (See UAL).
The RR - the cowlings look longest and the pylon portion a bit rectangular. (See Thai).
It is not like the others where RR have core cowls (meta) and GE's generally have tail cone exposed.
DfwRevolution From United States of America, joined Jan 2010, 1226 posts, RR: 51
Reply 5, posted (8 years 2 months 2 weeks 2 days 20 hours ago) and read 3047 times:
When trying to distinguish between the PW4000 and the Trent 800 series, the "cap" on the fan hub is rounder on the Pratt engine. The Rolls Royce engine is more pointy. I really wish I had more descriptive, technical terms to back this up, but I'll let these pictures explain:
Not a clear sign of a RR engine. Look at AA's 777's. No RR emblem on the side. They're unbadged. It's a customer option.
From head-on, the RR Trent looks a bit smaller than the GE90, and is higher up (from the ground) when the aircraft is on the ground. At my local airport, I can always spot a P&W powered 777 on take-off. They always have a characteristic black smoke trail, that you don't generally see on RR and GE engines.