OldAeroGuy From United States of America, joined Dec 2004, 3634 posts, RR: 66
Reply 3, posted (10 years 3 weeks 4 days 18 hours ago) and read 5227 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
Starlionblue From Greenland, joined Feb 2004, 17248 posts, RR: 67
Reply 7, posted (10 years 3 weeks 4 days 16 hours ago) and read 4884 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."
F-WWKH From Taiwan, joined Jun 1999, 322 posts, RR: 0
Reply 9, posted (10 years 3 weeks 4 days 1 hour ago) and read 4039 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.
GodBless From Sweden, joined Apr 2000, 2753 posts, RR: 16
Reply 10, posted (10 years 3 weeks 4 days ago) and read 3913 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...
RayChuang From United States of America, joined Jun 2000, 8062 posts, RR: 4
Reply 12, posted (10 years 3 weeks 3 days 21 hours ago) and read 3185 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!
Srbmod From , joined Dec 1969, posts, RR:
Reply 15, posted (10 years 3 weeks 3 days 20 hours ago) and read 2948 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...