Topic Author
Posts: 1245
Joined: Sun Oct 07, 2001 11:46 am

777 Engine Diameter

Sat Oct 05, 2002 3:30 am

Hello everyone,

Could anybody refer me to proof (website preferred) that the cowl diameter on the 777 is as wide as a 737- 200 fuselage. It would be much appreciated!!!

Posts: 235
Joined: Fri Jun 01, 2001 8:37 pm

RE: 777 Engine Diameter

Sat Oct 05, 2002 3:53 am

On the above link there was an interesting comparison between a B737's fuselage and GE90. I tried to see the photos but it appeared not more available.

Anyway, for some technical data, try to check:

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Joined: Tue Jun 18, 2002 2:39 pm

RE: 777 Engine Diameter

Sat Oct 05, 2002 12:46 pm

The GE90 is way big, but the PW and RR engines look smaller in diameter and they look alike too.
Posts: 390
Joined: Tue Oct 30, 2001 5:46 am

RE: 777 Engine Diameter

Sun Oct 06, 2002 1:57 am

Excuse me, but what does God need with a starship?
Posts: 1048
Joined: Fri Mar 23, 2001 8:10 am

RE: 777 Engine Diameter

Sun Oct 06, 2002 8:18 am

"The 112-inch PW4000 also is our largest commercial engine, its diameter nearly as wide as the fuselage of a Boeing 737."

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Joined: Tue May 29, 2001 9:51 am

RE: 777 Engine Diameter

Sun Oct 06, 2002 9:53 pm

The 737's interior cabin width is 11'7", so that means the exterior fuselage diameter is about 12.5' right?

If the GE90 has a 10' fan diameter, and the cowling is a little bigger, then the 777 engine isn't as big as a 737 fuselage.

I'm just comparing numbers, I've never been up close to a 777 engine in person to see its size.
Posts: 223
Joined: Mon May 13, 2002 3:07 pm

RE: 777 Engine Diameter

Mon Oct 07, 2002 6:47 pm

PW4084, 4090, 4098 fit in the following envelope:
Diameter 119 inches length 191.7 inches
(Source Aviation Week Aerospace Source Book 2002)
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RE: 777 Engine Diameter

Mon Oct 07, 2002 10:32 pm

The GE 90 Fan is 123" so add to that the thickness of the containment ring (remember this has to contain a blade separation so it's not thin) plus the fact the EEC and Oil tank are mounted on the outside under the fan cowls so I would guess adding at least another 12-18" to either side to reach the fan cowl.
That's 147-159" (12'3"-13'3") diameter that's getting very close to the 737 fuse as DC10Tony said.
P1 in A330, A340, A346, B742, B744, B748.

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