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RB211-535C & RB211-535E4 Intermix  
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Posted (1 year 10 months 3 weeks 6 days 14 hours ago) and read 4231 times:

Why was the RB211-535C & RB211-535E4 Intermix option not provided by Boeing.Any reason.


Think of the brighter side!
14 replies: All unread, jump to last
 
User currently offlineIFixPlanes From Germany, joined Feb 2005, 239 posts, RR: 0
Reply 1, posted (1 year 10 months 3 weeks 6 days 1 hour ago) and read 4095 times:

Quoting HAWK21M (Thread starter):
...Any reason.

Compare the length, thrust, etc. in the TCDS (E12EU) and you see why!  



never tell an engineer he is wrong ;-)
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 2, posted (1 year 10 months 3 weeks 5 days 22 hours ago) and read 4068 times:

What I meant was why not a conversion attachment to accomodate both versions.


Think of the brighter side!
User currently offlineTristarsteve From Sweden, joined Nov 2005, 4025 posts, RR: 33
Reply 3, posted (1 year 10 months 3 weeks 5 days 22 hours ago) and read 4063 times:

Eastern had B757 delivered with 535C engines, which they replaced with 535E.
British Airways bought the removed engines and fitted them to new B757 on the line.
The 535C was much cheaper than the E, and BA average B757 route was 90mins. In those days of cheap fuel it made sense to use the C engines.
And the C engines use a lot more fuel. We had both, and for a 2 hour sector the C would use about a ton more fuel.
We tanked 12 tonnes on a E and 13 tonnes on a C engined B757. (Fuel in tanks, not burn.)


User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 4, posted (1 year 10 months 3 weeks 5 days 20 hours ago) and read 4045 times:

Quoting Tristarsteve (Reply 3):
And the C engines use a lot more fuel.

Read someplace that the difference in fuel consumption of the -C to the -E4 is approx 18% more.



Think of the brighter side!
User currently offlineIFixPlanes From Germany, joined Feb 2005, 239 posts, RR: 0
Reply 5, posted (1 year 10 months 3 weeks 5 days 1 hour ago) and read 3926 times:

So, what do you want to know?  
- Intermix (different engine types on the same aircraft) or
- conversion (changing from two 353C to two 353E4 and vice versa)



never tell an engineer he is wrong ;-)
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 6, posted (1 year 10 months 3 weeks 4 days 22 hours ago) and read 3897 times:

Intermixing between the RB211-535E4,RB211-535E4-B2 & RB211-535E4-C exist.
I'm referring to dual usage of the RB211-535C & its -E4 counterpart.



Think of the brighter side!
User currently offlineboeing767mech From United States of America, joined Dec 2000, 1029 posts, RR: 3
Reply 7, posted (1 year 10 months 3 weeks 4 days 20 hours ago) and read 3888 times:

Quoting HAWK21M (Reply 6):
Intermixing between the RB211-535E4,RB211-535E4-B2 & RB211-535E4-C exist.

E4's and C motors have differnet C Ducts ( thrust reversers) so it is more then just bolt on a engine and go.

You have pictures of a 757 with a E4 on one side and a C motor on another???



Never under-estimate the predictably of stupidty
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 8, posted (1 year 10 months 3 weeks 3 days 23 hours ago) and read 3752 times:

Quoting boeing767mech (Reply 7):

You have pictures of a 757 with a E4 on one side and a C motor on another???

I do....We have both types........
However was wondering why Boeing did not consider a fixing device common for both types.



Think of the brighter side!
User currently offlineboeing767mech From United States of America, joined Dec 2000, 1029 posts, RR: 3
Reply 9, posted (1 year 10 months 3 weeks 3 days 22 hours ago) and read 3749 times:

Quoting HAWK21M (Reply 8):
Quoting boeing767mech (Reply 7):
You have pictures of a 757 with a E4 on one side and a C motor on another???
I do....We have both types........

Lets try this again, do you have a picture with ONE Airframe with a 535C under one wing and a 535E under the other?

Why would you put a lesser thrust engine on one side of the airplane, not to forget the 24 hours of downtime to the airframe changing the C ducts since they are not interchangable between 535C and 535E's????

[Edited 2012-12-04 01:52:40]


Never under-estimate the predictably of stupidty
User currently offlinestrfyr51 From United States of America, joined Apr 2012, 1304 posts, RR: 1
Reply 10, posted (1 year 10 months 3 weeks 3 days 16 hours ago) and read 3700 times:
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AS I recall? The engine choice is made by the Operator and were enough RB211 operators to press Boeing and the pylon supplier (who might NOT be Boeing) for an answer then it might happen, but the problem is mainly to Rolls Royce Not Boeing. Rolls might NOT see any reason to look for a solution. And? Their solution might be,, Get rid of the 'C' model and upgrade to the "E4" model.

User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 11, posted (1 year 10 months 3 weeks 2 days 20 hours ago) and read 3609 times:

Quoting boeing767mech (Reply 9):

Why would you put a lesser thrust engine on one side of the airplane, not to forget the 24 hours of downtime to the airframe changing the C ducts since they are not interchangable between 535C and 535E's????
Quoting strfyr51 (Reply 10):
Rolls might NOT see any reason to look for a solution. And? Their solution might be,, Get rid of the 'C' model and upgrade to the "E4" model.

Looking for a situation where by an operator could use both types in case there was a spare issue for a small duration.
If RR decided against it there must have been a reason.



Think of the brighter side!
User currently offlineWestern727 From United States of America, joined Jan 2007, 751 posts, RR: 4
Reply 12, posted (1 year 10 months 2 weeks 4 days 14 hours ago) and read 3300 times:

Quoting HAWK21M (Reply 4):
difference in fuel consumption of the -C to the -E4 is approx 18% more.

That's huge for a sister engine with comparable thrust. Anyone know what in particular contributed to the reduced fuel consumption on the -E4?



Jack @ AUS
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 13, posted (1 year 10 months 2 weeks 4 days ago) and read 3152 times:

Better Materials, Revised bleed valve distribution,Extended Tail pipe etc to name a few.


Think of the brighter side!
User currently offlineSmittyOne From , joined Dec 1969, posts, RR:
Reply 14, posted (1 year 10 months 2 weeks 3 days 19 hours ago) and read 3118 times:

Quoting Western727 (Reply 12):
That's huge for a sister engine with comparable thrust. Anyone know what in particular contributed to the reduced fuel consumption on the -E4?

The E4 also has the wider chord fan blades...not sure how much that matters?


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