why are the engine pylons........

why are the engine pylons different on the B737-300 compared to the B737-700?

are they different for a purpose?

I'll bite anyway and say it MIGHT, just might, have something to do with the -700 being a larger airframe.


P.S. You are 7 questions into your "JC new user" alloted 21. Use the next 14 wisely please.

what do you mean use you next 14 questions wisley?

I think it was a joke.

What engines are we talking? The 737s take a wide variety of engine types, so I'm guessing the pylons are gonna be different for each one. I know the -700 has beefier engines than the -300, so that's probably one reason.

Also, the earlier 737's have the squared-off pylons to allow for some ground clearance on x-wind landings due to their short landing gear. As another poster mentioned, the 700 is a larger airframe which also has longer/stronger gear, thus eliminating the need for the "square".

Re: different engine shapes for 737s

Nacelle ground clearance for a "Classic" is a whopping 18 inches. The NGs have little bit longer legs, so the cowling can have smaller love handles.

On a separate question, did you know the Subject line of all of your posts is half of a sentence followed by a dozen dots?

Re: different engine shapes for 737s

[ QUOTE ]
why are the engine pylons different on the B737-300 compared to the B737-700?

are they different for a purpose?

[/ QUOTE ] No, Boeing just spent engineering manpower and built new tooling because they felt like it.

Seriously, I always laugh when I see post like this. Sometimes there is an easy answer, but many times the only answer is 'I don't know, ask the engineers'.

Re: different engine shapes for 737s

A friend of mine is a 737 mechanic and says the bigger engine is the reason. Additionally, this new pylon design makes engine changes easier.