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The 757 Nose  
User currently offlineN200WN From United States of America, joined Feb 2005, 784 posts, RR: 6
Posted (9 years 3 months 2 weeks 5 days 5 hours ago) and read 4929 times:

It seems like the nose of the 757 is one that everyone likes and it gives the airplane a very distinct look. If I remember correctly the 757 was going to have the same nose as a 707/727 and the collision/crash of PSA Flight 182 in San Diego in 1978 led to the design changes to allow for better outward cockpit visibility.

My question is if that nose design could be applied to the 757 why was it not also applied to later 737 designs changes...especially the 73G? Aren't the 707/727/737/757 all the same fuselage cross sections? Would it have been possible?

18 replies: All unread, jump to last
 
User currently offlineLemurs From United States of America, joined Mar 2005, 1439 posts, RR: 4
Reply 1, posted (9 years 3 months 2 weeks 5 days 5 hours ago) and read 4896 times:

Quoting N200WN (Thread starter):
It seems like the nose of the 757 is one that everyone likes and it gives the airplane a very distinct look. If I remember correctly the 757 was going to have the same nose as a 707/727 and the collision/crash of PSA Flight 182 in San Diego in 1978 led to the design changes to allow for better outward cockpit visibility.

This was just being discussed in Tech/Ops today in the thread I am linking below. The consensus there from people who I would trust with this answer is that it has more to do with the flight deck commonality that got imposed on the 757 later in it's design process:

Why The Forehead On Some A/c? (by AR1300 Apr 12 2005 in Tech Ops)



There are 10 kinds of people in the world; those who understand binary, and those that don't.
User currently offlineAeroWeanie From United States of America, joined Dec 2004, 1607 posts, RR: 52
Reply 2, posted (9 years 3 months 2 weeks 5 days 4 hours ago) and read 4807 times:
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> My question is if that nose design could be applied to the 757 why was it not > also applied to later 737 designs changes...especially the 73G? Aren't the
> 707/727/737/757 all the same fuselage cross sections? Would it have been
> possible?

Changing the cockpit cab on the 737 would have been very expensive. There was no need for a common type rating with the 757/767, so the same cockpit layout as the 757/767 was not needed, which is what drove the 757 cab shape.


User currently offlineBoeing7E7 From , joined Dec 1969, posts, RR:
Reply 3, posted (9 years 3 months 2 weeks 5 days 4 hours ago) and read 4795 times:

Don't be surprised if it's seen again on the 737 replacement, or at least something strikingly similar.

User currently offlineDAirbus From United States of America, joined Nov 2003, 593 posts, RR: 2
Reply 4, posted (9 years 3 months 2 weeks 4 days 20 hours ago) and read 4558 times:
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I heard a story a couple of years back that when Boeing was designing the 737NG, they wanted to give it the 757's nose since it is more aerodynamically efficient and reduces cockpit wind noise. However, WN nixed that idea because it would of meant stocking two different types of radomes which goes against their low cost philosophy.


"I love mankind. It's people I can't stand." - Charles Shultz
User currently offlineJblake1 From United States of America, joined Aug 2003, 292 posts, RR: 0
Reply 5, posted (9 years 3 months 2 weeks 4 days 19 hours ago) and read 4485 times:

What is interesting to me is how the 757 nose makes it look like the cross section is smaller then that of the 737. I know that's not the case but visually to me anyway it appears that way.

User currently offlineBronko From United States of America, joined Jul 2001, 810 posts, RR: 11
Reply 6, posted (9 years 3 months 2 weeks 4 days 10 hours ago) and read 4062 times:

I would love to see a doctored image of a 737 with a 757 nose, since it looks like Boeing did consider it at one point.

Anyone know of such an image?



Jet City Aviation Photography
User currently offlineSeptember11 From United States of America, joined May 2004, 3623 posts, RR: 21
Reply 7, posted (9 years 3 months 2 weeks 4 days 10 hours ago) and read 3823 times:

757 nose

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727 nose

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User currently offlineSATX From United States of America, joined Apr 2005, 2840 posts, RR: 7
Reply 8, posted (9 years 3 months 2 weeks 4 days 10 hours ago) and read 3734 times:

I never really liked the noses of the 737 or the 757. The 787's original nose was really cool looking to me. Now it sounds like the final nose will be a bit more mundane than originally shown. Oh well.


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User currently offlineFriendlySkies From United States of America, joined Aug 2004, 4105 posts, RR: 5
Reply 9, posted (9 years 3 months 2 weeks 4 days 10 hours ago) and read 3646 times:

SATX:

The 787 nose will look just like it was pictured according to Boeing, as annouced today. And it's going to stay that way for good, because Boeing froze the structural lines of the aircraft.


User currently offlineDfwRevolution From United States of America, joined Jan 2010, 962 posts, RR: 51
Reply 10, posted (9 years 3 months 2 weeks 4 days 9 hours ago) and read 3496 times:

Quoting N200WN (Thread starter):
Aren't the 707/727/737/757 all the same fuselage cross sections? Would it have been possible?

No... they have the same upper bubble, but the lower bubble of the 757 is slightly wider which makes it appear closer to a full circular cross-section. Boeing could not simply "graft" the 757 nose onto the 737NG


User currently offlineAeroWeanie From United States of America, joined Dec 2004, 1607 posts, RR: 52
Reply 11, posted (9 years 3 months 2 weeks 4 days 9 hours ago) and read 3287 times:
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Also, the 757 lower lobe grows slightly as you move aft. I first heard this as an aero legend, but we laser scanned one and its there.

User currently offlineAccidentally From United States of America, joined Dec 2000, 643 posts, RR: 0
Reply 12, posted (9 years 3 months 2 weeks 4 days 9 hours ago) and read 3011 times:
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Cory Crabtree - crab453 - Indianapolis - 2R2 - 1966 PA-32-260
User currently offlineSATL382G From , joined Dec 1969, posts, RR:
Reply 13, posted (9 years 3 months 2 weeks 4 days 9 hours ago) and read 2943 times:

Quoting N200WN (Thread starter):
Aren't the 707/727/737/757 all the same fuselage cross sections?

No, even the 707 & 727/737 don't share the same fuselage cross section. The 707 fuselage is considerably deeper.

Quoting AeroWeanie (Reply 11):
Also, the 757 lower lobe grows slightly as you move aft. I first heard this as an aero legend, but we laser scanned one and its there

The 757 fuselage is 7 inches deeper aft of the wing box, a characteristic it shares with the 727 BTW.


User currently offlineFriendlySkies From United States of America, joined Aug 2004, 4105 posts, RR: 5
Reply 14, posted (9 years 3 months 2 weeks 4 days 9 hours ago) and read 2918 times:

I'm very happy Boeing chose not to use that design...the 757 would have been right up there with the A380 for ugliest commercial aircraft!

User currently offlinePillowtester From United States of America, joined Nov 2004, 245 posts, RR: 0
Reply 15, posted (9 years 3 months 2 weeks 4 days 7 hours ago) and read 2362 times:

That picture of the 757 prototype with the T-Tail and 737 nose is perplexing.

It must have been designed in the mid to late 70s, especially with those large turbofan engines.

Why is it painted in Braniff's late 50s/early 60s livery? By then it should have already been many years into the "Flying Colors" livery.

???



...said Dan jubilantly.
User currently offlineCptkrell From United States of America, joined Sep 2001, 3220 posts, RR: 12
Reply 16, posted (9 years 3 months 2 weeks 4 days 7 hours ago) and read 2227 times:

Very NICE modelwork, Cory. Appears to be 1:144 scale?

BTW, Pillowtester, this type of modeling is classified as "Flights of Fancy" in airliner modeling contesting (the aircraft was never actually built or put into airline service) and as such, any livery from any era, even hypothetical graphics, is expected.

I personally think the 757 nose is one of the most distinctive and attractive of any jetliner "face". Maybe slightly OT, but I couldn't resist commenting. Regards...Jack



all best; jack
User currently offlineDfwRevolution From United States of America, joined Jan 2010, 962 posts, RR: 51
Reply 17, posted (9 years 3 months 2 weeks 4 days 5 hours ago) and read 1597 times:

Quoting Pillowtester (Reply 15):
It must have been designed in the mid to late 70s, especially with those large turbofan engines.

Bingo... the 727-300 morphed into the 7N7 then 757 from 1975 to 1979.


User currently offlineAeroWeanie From United States of America, joined Dec 2004, 1607 posts, RR: 52
Reply 18, posted (9 years 3 months 2 weeks 4 days 5 hours ago) and read 1448 times:
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Quoting SATL382G (Reply 13):
The 757 fuselage is 7 inches deeper aft of the wing box, a characteristic it shares with the 727 BTW.

I'm not referring to that - I mean that the lower lobe ahead of the wing deepens as it goes aft. Story is that a tunnel test showed it was worth a little bit of drag, so they included it in the design. Trouble is, this makes the forward baggage bay taper in height.


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