UAORD
Posts: 84
Joined: Wed Nov 05, 2003 4:01 am

Boeing 727/737/Adv

Mon Feb 16, 2004 9:49 am

Why are the oldest model aircraft such as the 737-200 and the 727 models have adv extenstions? Is this do this with hush-kits on the enginges?
 
UAL727222
Posts: 56
Joined: Sun Dec 28, 2003 7:01 am

RE: Boeing 727/737/Adv

Mon Feb 16, 2004 9:52 am

If by extension, you're referring to the longer engines, at the end of the exhaust, those are hushkits, required for compliance with Stage III noise regulations.
 
OPNLguy
Posts: 11191
Joined: Tue Jun 15, 1999 11:29 am

RE: Boeing 727/737/Adv

Mon Feb 16, 2004 10:03 am

If by "extensions" you mean the listings in various aircraft databases like, say, a 737-2H4(A), the "A" designates the "ADVanced" version of the 737-200 (Southwest, in this case) versus the earlier "Basic" version of the 737-200.

Regarding the 737s, the ADV models started showing up in the early 1970s and had several improvements over the Basic models.

-The engine forward engine cowlings were re-designed, and no longer had the little "sucker doors" that opened at high power settings.

-The leading edge Krueger flaps were extended and ran closer to the fuselage, resulting in better takeoff performance.

-Structural weight limits were increased. For example, max landing weight went from 98,000 lbs on a Basic to your choice of 103,000, 105,000 or 107,000 depending upon whether your order JT8D -9, -15, or -17 engines, respectively.

The 727-200 family went through similar changes...
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
cs03
Posts: 397
Joined: Sun Oct 12, 2003 9:56 am

RE: Boeing 727/737/Adv

Mon Feb 16, 2004 11:27 am

For both Models, PAX was increased, and both engine and a/c were improved by adding engine power, and seats (from adding to the a/c size), and it proved to be a money-maker for Boeing!
 
OPNLguy
Posts: 11191
Joined: Tue Jun 15, 1999 11:29 am

RE: Boeing 727/737/Adv

Mon Feb 16, 2004 12:12 pm

Here's some more info on the 737s...

http://www.b737.org.uk/history.htm

http://www.boeing.com/assocproducts/aircompat/acaps/7371sec2.pdf

To clarify, the fuselage of the 737-100 was stretched and that became the 737-200 (Basic) and the -200 Basic could indeed carry more passengers than a -100. The changeover from -200 Basic to the -200 ADV in 1971 kept the same physical dimensions, IIRC, and any increases in pax capacity between the -200 basic and the -200 ADV were coincidental as to what a particular airline ordered as an option on their -200 ADV's, and wasn't a function of the changeover itself.

As an aside, the 737-200 Basic with -7 engines was a dog aircraft that couldn't get out of its own way on hot days, and/or at hot-and-high airports.

With the -700s, I've died and gone to Heaven...  Big grin

[Edited 2004-02-16 04:18:57]
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos