Hi George-

The dimensions for (most of) the 707, 727, and 737 airplanes are 10"x14". This isn't specific to your question, but the original spec. for the 707 and 720 windows was 9"x12.5" (this is per a TWA station diagram from a maintenance manual I have that lists their 707 windows as, and I quote: "9x12.5 (typ.)"). IIRC only American ordered their 707s and 720s with the now-standard larger panes, but the 707 is a different beast altogether; regardless, once the 727 came along, the 10"x14" standard was pretty well set in stone...

Back to your question, though: Even the newest 737s are still 10"x14", though they look different most certainly from the inside and to a lesser extent from the outside, as the "Sky" interior uses cabin wall panels that cover portions of the windows to give the illusion of being closer to what's on the 787, which can be more or less visible, depending on your viewing angle.

Also of note if you're drawing your own windows: The corner radii for all cabin windows--including the earlier smaller early 707/720 versions--are 3".

Spacing is nominally 20" on center, which matches Boeing's standard fuselage frame spacing: But watch out, as on the 737 the frame interval aft of the overwing exits varies, albeit quite slightly. It's not really noticeable until you see it the first time...And then, if you're like me, you'll never be able to *stop* seeing the difference There are other spacing peculiarities based on variant (which won't matter to you since you're not building a long-body airplane), as some are slightly moved and/or missing altogether due to placement of internal components (mostly ventilation duct risers, bulkheads, lavatories, etc.; a duct riser is the reason for the missing window that first showed up on the 737-300).

I tend to agree that the fuselage length exaggerates/accentuates the "feel" of different sizes, but they're the same for every 737 ever built, from the first prototype in 1967 to the most recent rollout this week...

So imagine that: After 1,834 727s, something on the order of 8,000+ delivered and/or ordered 737s, and plenty of the original 707s, that same piece of polycarbonate that makes the windowpane hasn't changed since the 1950s--in dimension at least. Then again, neither has the windscreen, or numerous other tiny parts and pieces; nearly three-quarters of a century later, and we're still looking out the same portholes, either as pax or on the flightdeck . Considering other bits & pieces too, I get a kick out of the thought of a late 1950s-build 707 having a radome you could fasten to a 737NG that came off the line in July of 2014, nearly seven decades later. Further proof that if it isn't broken, why fix it

Anyway...Ramblings aside, I hope that's of some help...

Rob in AK

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Jennings :
Only the 707-120 & 720 had the larger windows as an option. All -320/B/C had the smaller windows. ALL other Boeing's had the larger windows.

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Really? I didn't know that. Good to add to the library. I'd always assumed that by the time the -300/400 series rolled around they'd started to settle on something resembling a standard.

Somewhere, somehow, sometime we all need to sit down and come up with an encyclopedia (I'm convinced it's be at least as thick as a "real" one ) of all this kind of trivia...

Rob in AK

PS Not to hijack the thread, but do you know what the 74/5/67 used for dimensions?

Taking the offer of a hijack, when Rodens 720 was released amongst some of it's stated faults was, if I remember correctly, something about the cabin windows being too small (and possibly in the wrong location). Are they too small for even the smaller window option that was available for the 720 (and let's not start flaming the Roden kit)?

Great information from Rob and Jennings, I enjoy reading "trivia" like this.

Jeff

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Jennings :
Up to the 767-400ER all Boeing products used the same windows. 727, 737, 747, 757, and 767. The 777 introduced the slightly larger oval window, and of course the 787's is much larger and back to rectangular.

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You're kidding...It's probably an optical illusion or somesuch, but I'd have sworn the 75/76 windows were just a bit larger. Did they tweak the corner radii or something, or have my eyes really lost it after all these years aboard AS "Ubuqijets" as a friend of mine likes to call them...

I know the 764 has the 777 window portals; that's one of the nicer things about that airplane (believe me, riding in the extreme rear of one with a tweak-y yaw damper can be a bit of a nauseating experience...Long lever arm and all that...) but as I'm probably never destined to ride on one again I suppose that ship has sailed, so to speak...

Regardless, that's interesting about the panes being common from basically the 727 through the 767-300. The things one learns around here...Truly amazing.

Rob in AK

NB If this really is the case, all I can say is the folks at Nordam (the contractor who makes the windows, based in KTUL) must've made a blazing fortune over the last 60+ years...Add up all the Boeing 'frames produced, and that's a lot of windows, both installed and as spares...

I'd be interested in doing an encyclopedia/spotters guide with all of this stuff. I've been considering writing one for a while. Shall we set up a wiki?