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727-400X - Never Flew Off The Drawing Board?  
User currently offlineN9801F From Samoa, joined Apr 2004, 332 posts, RR: 0
Posted (9 years 6 months 2 weeks 5 days 16 hours ago) and read 5376 times:

Did Boeing consider further stretching the 727-200?

I have a hazy memory of a design with fuselage plug, tandem gear, uprated engines, etc.

Am I imagining things here, or can someone provide details?

15 replies: All unread, jump to last
 
User currently offlineYyz717 From Canada, joined Sep 2001, 16245 posts, RR: 56
Reply 1, posted (9 years 6 months 2 weeks 5 days 15 hours ago) and read 5279 times:

Yes. Boeing offered a stretched 727-300 in the mid-70's. UA was the only airline that publically showed interest. The 723 never got beyond the drawing board.






Panam, TWA, Ansett, Eastern.......AC next? Might be good for Canada.
User currently offlineBluewave 707 From United States of America, joined Jun 2001, 3152 posts, RR: 6
Reply 2, posted (9 years 6 months 2 weeks 5 days 14 hours ago) and read 5118 times:

The -300 was a proposal that is profiled in some books detailing the 727, 757, or the Boeing Co. as a whole. The 752 and 734 became replacements for the 722. Too bad the 727-300 never materialized.


"The best use of your life will be to so live your life, that the use of your life will outlive your life" -- D Severn
User currently offlineOldAeroGuy From United States of America, joined Dec 2004, 3476 posts, RR: 67
Reply 3, posted (9 years 6 months 2 weeks 5 days 14 hours ago) and read 5101 times:

The 727-300 did get a little further than the drawing board as flight testing was done on the Boeing owned 727 with the revised leading edge proposed for the -300. The new system replaced the outboard slats with variable camber Kruegers similar to those used on the 747.

The new leading edge devices allowed a higher stall angle of attack. Part of the flight tests evaluated the implications of this higher stall angle on h. tail entry into the wing wake and the subsequent loss of stall recovery capability (i.e. "deep stall"). The concern was accentuated by the larger diameter of the JT8D-217 engines proposed for the -300 compared to the standard JT8D.

Ultimately, the technology level of the -217 engine combined with the 727 three person flight crew could not over come the operating cost advantages of high bypass ratio Twins with two person crews, giving rise to the 737/CFM56 and the 757.



Airplane design is easy, the difficulty is getting them to fly - Barnes Wallis
User currently offlineN9801F From Samoa, joined Apr 2004, 332 posts, RR: 0
Reply 4, posted (9 years 6 months 2 weeks 5 days 13 hours ago) and read 4993 times:

Very interesting, and thank you all for your replies.

With 3 -217's, it's easy to imagine that this thing would have had good takeoff performance and range, but perhaps would have looked more like a Tu-154...

Again, thank you for the information.


User currently offlineStarlionblue From Greenland, joined Feb 2004, 16992 posts, RR: 67
Reply 5, posted (9 years 6 months 2 weeks 5 days 13 hours ago) and read 4918 times:

There was also this proposal:




"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineN9801F From Samoa, joined Apr 2004, 332 posts, RR: 0
Reply 6, posted (9 years 6 months 2 weeks 5 days 12 hours ago) and read 4813 times:

Aha - so it's a twin!

Starlion, huge thanks for this.

It looks like it was really ahead of its time technologically - winglets, etc. Though it's easy to see how such a 3-crew plan would have been squeezed (un)economically between the MD-80 and 757.


User currently offlineStarlionblue From Greenland, joined Feb 2004, 16992 posts, RR: 67
Reply 7, posted (9 years 6 months 2 weeks 5 days 12 hours ago) and read 4758 times:

Well, let's not get confused here. As far as I know, The 727-300 and the 787-300 were different proposals. The 727-300 was still a triplet with a modified wing, wide fan engines and bogie landing gear.


"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineYyz717 From Canada, joined Sep 2001, 16245 posts, RR: 56
Reply 8, posted (9 years 6 months 2 weeks 5 days 4 hours ago) and read 4444 times:

As far as I know, The 727-300 and the 787-300 were different proposals.

True. The 723 was a proposed simple stretch of the 722.




Panam, TWA, Ansett, Eastern.......AC next? Might be good for Canada.
User currently offlineF-WWKH From Taiwan, joined Jun 1999, 322 posts, RR: 0
Reply 9, posted (9 years 6 months 2 weeks 4 days 20 hours ago) and read 3913 times:

Obviously this 787 is a recent proposal, at least not much older than plans for the B777. Oh how much I would love to see Boeing go ahead with this design, the B727 lines are still THE most elegant ones in aviation. But very likely this design is superseeded by the Dreamliner.

User currently offlineGodBless From Sweden, joined Apr 2000, 2752 posts, RR: 16
Reply 10, posted (9 years 6 months 2 weeks 4 days 20 hours ago) and read 3787 times:

The 727-300 and the 787-300 can't have anything to do with eachother. As you can see the 787 has the new Boeing logo beside the titles so it's a post-MDD-merger thing. Maybe it was an idea to keep the MDD people happy by having a plane looking similar to the MD-80...

Max


User currently offlineAircellist From Canada, joined Oct 2004, 1709 posts, RR: 8
Reply 11, posted (9 years 6 months 2 weeks 4 days 19 hours ago) and read 3546 times:

This 787-300...

What a nice looking fake! Reminds us that yes, the lines of the 727 were so elegant...


User currently offlineRayChuang From United States of America, joined Jun 2000, 7987 posts, RR: 5
Reply 12, posted (9 years 6 months 2 weeks 4 days 17 hours ago) and read 3059 times:

Actually, during the late 1970's Boeing seriously looked at designing a 727-300 that dispensed with the three JT8D engines in favor of two PW2037 engines. If that project had gone ahead it would have likely cause Airbus to lose a lot of A320 orders because airlines like IB, LH and AZ would have bought this plane en masse for parts commonality reasons and Boeing would likely have kept the 727 line going even today!

User currently offlineN328KF From United States of America, joined May 2004, 6483 posts, RR: 3
Reply 13, posted (9 years 6 months 2 weeks 4 days 16 hours ago) and read 2905 times:

That 787-300 design looks fake to me. Especially since it says "drawn by DKDesign." But the real clue is the fact that the Boeing typeface is screwed up.


When they call the roll in the Senate, the Senators do not know whether to answer 'Present' or 'Not guilty.' T.Roosevelt
User currently offlineDennys From France, joined May 2001, 867 posts, RR: 1
Reply 14, posted (9 years 6 months 2 weeks 4 days 16 hours ago) and read 2875 times:

cann't they make a new 707-800X ?????


707s lover .


User currently offlineSrbmod From , joined Dec 1969, posts, RR:
Reply 15, posted (9 years 6 months 2 weeks 4 days 16 hours ago) and read 2822 times:

There have been several plans that never went too far to turn the 727 into a twinjet with the #2 engine removed, as well as the intake. I remember seeing a picture on here a few years back of a model of a twin-engine 727 in Delta colors. It looked liked the chubby brother of the MD-80...

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