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I need your help! Boeing 757-200 technical information.

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I need your help! Boeing 757-200 technical information.

Old 17th Mar 2007, 17:49
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Question I need your help! Boeing 757-200 technical information.

Hi,
I am writing a paper on the 757-200 for a university project but I am having some trouble finding certain bits of information.

Does anyone know how many flight test aircraft were built at the beginning of the 757 program?

Also I am trying to find the maximum Mach number of a Roles Royce RB211 engine along with the turbine inlet temperature?

I need all the help I can get on this one so any information you can give me will be greatly appreciated.

Thanks,
Cavok86.
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Old 17th Mar 2007, 23:22
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Regarding the turbine inlet temperature, I can give you T7, which is the low pressure turbine inlet temp (RB211 is 3 spool, but I guess you know). T7 also known as the EGT on the 757, limits for a RB211-535C:
ground start, in flight start:570C
max continuous:795C
maxtakeoff 850C
max reverse:795C
max overtemp 870C
Again, these are limits, actual EGT depends on a lot of factors.
What do you mean by engine Mmo? The aircrafts Mmo is 0.86 (B757-200)
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Old 18th Mar 2007, 10:11
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Mmo....UK CAA limited to M0.84.Not sure whether others reduce FAA certified limits
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Old 18th Mar 2007, 16:59
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757.org.uk is good, if you haven't already checked it out.
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Old 19th Mar 2007, 15:44
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The story so far

Thanks for the info on the turbine inlet temperatures, I think max continuous is what my academic is after but I am going to see him tomorrow to check.

I have seen 757.org.uk and have got a lot of good info from it but it doesnt have all of the technical info I need.

I have trawled the web and cant find anything on the number of flight test aircraft from the beginning of the program back in 1982. There is talk of a 10 month testing period and over 1,300hrs of test flying but nothing on the number of AC.

Does anyone know the number of flight test aircraft?
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Old 19th Mar 2007, 18:54
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Maybe try porting over at this web-site..............

http://www.b757.info/index%202.htm
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Old 19th Mar 2007, 19:03
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Check this article out.

It seems to indicate that only one was used for flight testing.

All others were delivered to customers.

http://www.boeing.com/commercial/new...r_041028g.html
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Old 21st Mar 2007, 22:31
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Evening all...

This website,

www.planespotters.net/Production_List/

has a list of all the a/c produced, it gives N757A as the first airframe still with Boeing but the next three N501EA / N502EA / N503EA went to Eastern. However going by the first flight dates there was an 8 month gap between the 4th a/c (503EA) and the 5th (504EA) making it's flight which I reckon is your certification process. You couldn't certify the aircraft in 8 months with just the one jet.

The same happened I remember more recently with United and the 777. Only the first one was Boeing's to keep the others all got painted up into United's outfit although still flying for Boeing and used for the certification then handed over cheap to UAL.

Regards technical info the best I can do is the technical manual they give us lot when converting onto the 757 which I suspect may not be technical enough, see what you think if you don't have it already. There's all sorts of stuff here but it's a bit like charity shop not guaranteed to be the latest issue.

http://www.smartcockpit.com/plane/boeing/B757/

Hope this helps...
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Old 22nd Mar 2007, 00:11
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Bit of drift, but that first 777 got re-engined and sold on to CX. It would be an expensive piece of kit to have sat gathering dust after all.

Boeing have currently taken a 777 on lease from AA as they don't have a suitable testbed for the 787 FBW systems.
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