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Old 27 October 2016, 12:03 AM
jimmy101_again jimmy101_again is offline
Join Date: 29 December 2005
Location: Greenwood, IN
Posts: 6,912

Originally Posted by Psihala View Post
I'm not sure what the year of introduction has to do with anything. If it did, the airlines should just retire the 737 (introduced in 1968), because, gosh, look what cars looked like back then.

A new 747-8 isn't as fuel efficient as the planes replacing it to be sure, but it would still vastly out-perform a introductory model 747-100.

Except the air-frame was designed by the same people that did the 1970 dart.

Any plane that has been in service for a while, regardless of when it was actually designed, eventually reaches the end of its useful life. As a particular aircraft ages out in service you generally take advantage of the nearly 50 years of air craft design progress when you replace it.

The time interval between the introduction of the first commercial jet airliner and the introduction of the 747 is about one fourth the time interval from the introduction of the 747 to today. Basically the original 747 is to jet airliners what a 1930's car is to today's cars. (Ignoring any updates in the design, which were no doubt numerous.)

The de Havilland Comet went into use in 1949 but was withdrawn because it kept crashing. The 707 and DC-8 were introduced a decade later in 1958. DC-8 to 747 (introduced in 1970) was 12 years. 747 to today is 46 years.

I am not an aircraft designer but I suspect the 737 that is used today has relatively little to do with the design from the 60's except for its basic size. The wings and tail are much different designs than what the engineers in the 60's came up with. So gosh, it isn't the same design as the original and the original really was designed by 60's era car designers versus 90's+ car designers for the current aircraft. The engines are separated by multiple generations. The original avionics have pretty much zero to do with the current avionics. I suspect that there isn't a single piece of a 60's era 737 that can be used on one built in the last 20 years. Heck even the seats of the 60's era can't be used in a current aircraft. So, the wings, tail, radio, engines, avionics, doors, main body struts, ... of the original were phased out years ago. The only thing the current 737 has in common with the original is the basic size and the "737".
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