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Engine Indentification?

Sbbre44 From , joined Dec 1969, posts, RR:
Posted (13 years 1 month 4 days 15 hours ago) and read 860 times:

RR engines on an aircraft are easy to spot, but how do you tell P&W and GE/SNEMCA engines apart?
Thanks in advance.

Arshad

3 replies: All unread, jump to last

DL_Mech From United States of America, joined Feb 2000, 1769 posts, RR: 10
Reply 1, posted (13 years 1 month 3 days 2 hours ago) and read 615 times:

On the B747-400/767, look for the precooler air outlet on the silver (aft) part of the cowling. It is square, darker gray in color and has three fins on it. If it is a Pratt, it is on the left side. Remember "P" Pratt=Pilots side. GE outlets are on the right side.
A Pratt

Click for large version

Photo © Alexander Jonsson

A GE

Click for large version

Photo © Carlos Borda

On the B777, I look for the engine inlet anti-ice outlet on the GE90. It is a round outlet on a square, unpainted section of the lower left nosecowl.

It's not going to the Moon.....It's just going to California

DL_Mech From United States of America, joined Feb 2000, 1769 posts, RR: 10
Reply 2, posted (13 years 1 month 2 days 17 hours ago) and read 601 times:

Oops-I made a mistake. The GE90 outlet is not on the lower part of the engine.
Click for large version

Photo © DIAspotter
The GE on the 777 is larger than the PW/RR engines, and I can only tell the PW from the RR by looking at the spinner.

It's not going to the Moon.....It's just going to California

DL_Mech From United States of America, joined Feb 2000, 1769 posts, RR: 10
Reply 3, posted (13 years 1 month 2 days 17 hours ago) and read 597 times:

Some more 777 engine photos:Rolls Royce
Click for large version