Originally Posted by
WideScreen
You're the Boeing expert: What are the differences between the B737-700 and B737-800 ? The length, the wiring around the extension locations. More ?
I'm not really an expert on the 737 (spent minimal time working it), but if you look at the 737NG, the -600, -700, -800, and -900, the systems and flight controls are nearly identical (aside from different wiring and control cable lengths). Similarly, engine wise, pretty much everything under the wing is the same aside from the engine rating plug. There are obviously structural differences with the different fuselage lengths and the different gross weights. The wing areas are common, although again structural differences for the different weights (mainly different thickness of the various materials). There is also some sort of structural difference going between the -700 and -800 wings - I don't know details, but when they started adding winglets they had to make minimal changes to the -800 (and -900) wings, much more major changes to the -700 wings (not sure if they ever put winglets on the -600 - not many were ever built).