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How To Tell The Difference Between 741 And 742?  
User currently offlineAirplanetire From United States of America, joined May 2001, 1809 posts, RR: 2
Posted (12 years 8 months 2 days 2 hours ago) and read 2581 times:

How do you tell the difference between a 747-100 and a 747-200? Most 747-100s have just those three windows on the side of the upper deck, but some have more like 6 or 7 (whatever it is on most 742s). On most 747-200s, there are something like 6 or 7 windows, but some have just 3 like most 747-100s.

18 replies: All unread, jump to last
 
User currently offlineTom_eddf From Germany, joined Apr 2000, 451 posts, RR: 0
Reply 1, posted (12 years 8 months 2 days 1 hour ago) and read 2512 times:

I guess there is no visual difference between the 741 and 742. By the way, I've never seen a 742 with just 3 windows, and most of the 741s I've been on had also 6 or more upper deck windows.

User currently offlineHlywdCatft From United States of America, joined Jan 2001, 5321 posts, RR: 6
Reply 2, posted (12 years 8 months 2 days 1 hour ago) and read 2498 times:

Don't all the 747s (100s-200s) have the 10 upperdeck windows? Its just that on some they put the window plugs in to look like there were only 3.

I know TWA used to put plugs in their 747-200s so their 747s would look alike


User currently offlineATA L1011 From United States of America, joined Feb 2001, 1379 posts, RR: 6
Reply 3, posted (12 years 8 months 1 day 23 hours ago) and read 2448 times:

Their is no way you can tell by just looking at it because some 741's have the extended windows and some 742's have the 3 windows. The differences are with Fuel Capacity, and the 742 has a Higher MGTW.


Treat others as you expect to be treated!
User currently offlineNG737PSR From United Kingdom, joined Feb 2001, 305 posts, RR: 0
Reply 4, posted (12 years 8 months 1 day 21 hours ago) and read 2410 times:

Take a look at the engines, most have the Pratt and Whitney JT9 series with the cone-like nozzle at the jet exhaust. Hope this may help you.

The windows are not a conclusive indicator.


User currently offlineAamd11 From UK - Wales, joined Nov 2001, 1059 posts, RR: 1
Reply 5, posted (12 years 8 months 1 day 16 hours ago) and read 2350 times:

The only conclusive evidence is partially the engines. If it has anything other than PW JT9D bangers on it then its a -200 or (one of ten) -100B models.
The only guaranteed evidence is to look at the maintanance book and service records... look up the registration, nothing but that will guarantee identification.
Have fun!


User currently offlineFanofjets From United States of America, joined Apr 2000, 1964 posts, RR: 3
Reply 6, posted (12 years 8 months 1 day 15 hours ago) and read 2333 times:

The three upperdeck windows was the standard configuration for all 747s (both -100s and -200s) until around 1974, when the ten upperdeck windows became standard (again, on both -100s and -200s).

Most airlines that purchased the earlier airframes opted for the ten-window retrofit that Boeing offered these customers. TWA, however, did exactly the opposite: those 747s built with a ten-window upperdeck were modified to the three-window configuration! All of TWA's 747 were -100 models, most of them factory-fresh -131s, though the airline did fly at least one -136 acquired secondhand from British Airways.



The aeroplane has unveiled for us the true face of the earth. -Antoine de Saint-Exupery
User currently offlineMr.BA From Singapore, joined Sep 2000, 3423 posts, RR: 22
Reply 7, posted (12 years 8 months 1 day 15 hours ago) and read 2328 times:

I thought the B741's and B742's engines don't make any difference in looks?

alvin



Boeing747 万岁!
User currently offlinePlanelover From United States of America, joined Dec 2001, 321 posts, RR: 0
Reply 8, posted (12 years 8 months 1 day 15 hours ago) and read 2322 times:

Wow! I learn something every day! I allways thought that 741s had 3 windows and 742s had 8-10. Is there any other differences between the two models? I heard somewhere that some 742s had an extended upper deck retrofited later on. Is this true? Then we would have a 742 looking like a 743! This is starting to get confusing!  Smile/happy/getting dizzy
That's what I think.


User currently offlineTom_eddf From Germany, joined Apr 2000, 451 posts, RR: 0
Reply 9, posted (12 years 8 months 1 day 9 hours ago) and read 2294 times:

Mr BA, engines don't make the difference between the 741/742 as long as both a/c are equipped with PW engines. But only the 742 was available with alternative engine options, the GE CF6 (LH...) and the RR RB211 (BA...).



User currently offlineVapourTrails From Australia, joined Aug 2001, 1140 posts, RR: 1
Reply 10, posted (12 years 8 months 1 day 7 hours ago) and read 2277 times:
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I always thought you could tell from the windows.. obviously not!  Smile

B747-100 ..

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..dirty!


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--------------------


B747-200

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"Oh, I have slipped the surly bonds of earth, and danced the skies on laughter-silvered wings.." John Gillespie Magee Jr
User currently offlineThe Coachman From Australia, joined Apr 2001, 1429 posts, RR: 0
Reply 11, posted (12 years 8 months 1 day 7 hours ago) and read 2268 times:

That KLM B747 is actually a -300 is it not? It has an extended upper-deck. It's not the windows but the length of the upper deck.


M88, 722, 732, 733, 734, 73G, 73H, 742, 743, 744, 752, 762, 763, 772, 773, 77W, 320, 332, 333, 345, 388, DH8, SF3 - want
User currently offlineGanymed From , joined Dec 1969, posts, RR:
Reply 12, posted (12 years 8 months 1 day 6 hours ago) and read 2254 times:

Is it just me or do these 2 P&W- powered 747s have slightly different engine pylons.
I ´m not sure though wether or not this is a clue in telling the 2 variants apart but in this case the 742 has redesigned engine pylons compared to the 741 even if both are powered by P&Ws


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User currently offlineA40-TY From United Arab Emirates, joined Apr 2000, 143 posts, RR: 0
Reply 13, posted (12 years 8 months 1 day 5 hours ago) and read 2235 times:

All 747's up to about line number 200 had the 3 window upper deck (100's and 200's). Later on many of these early aircraft were retrofitted to have the 10 window upper deck (as the first class lounge config. was removed for economic reasons). There are still a number of 747's flying with the 3 window upper deck (e.g. Air Atlanta Icelandic, JAL) and many of these are 747-200's.
It is not even possible to identify a dash number with the type of powerplant they have fitted. Nearly all RB211-524D4 powered 747's are series 200's, with the exception of Saudia's lighter weight 747-168's. The CF6 powered 747's are nearly all 200's except for ANA's 747SR-81's.
So in my view the only way to know if a 747 is a 100 or 200 is to consult an aircraft registration database or similar.



I love it when a plan comes together
User currently offlinePetertenthije From Netherlands, joined Jul 2001, 3363 posts, RR: 12
Reply 14, posted (12 years 8 months 1 day 4 hours ago) and read 2223 times:

That KLM plane is a -200. Later they stretched the uppper deck (hence the additional SUD to to type name).


Attamottamotta!
User currently offlineThe Coachman From Australia, joined Apr 2001, 1429 posts, RR: 0
Reply 15, posted (12 years 8 months 20 hours ago) and read 2196 times:

Ahh....

thank you.



M88, 722, 732, 733, 734, 73G, 73H, 742, 743, 744, 752, 762, 763, 772, 773, 77W, 320, 332, 333, 345, 388, DH8, SF3 - want
User currently offlineAirplanetire From United States of America, joined May 2001, 1809 posts, RR: 2
Reply 16, posted (12 years 8 months 15 hours ago) and read 2168 times:

Wasn't KLM the only airline to get the SUD modification to their 742s? Do they have any real 743s?

User currently offlineVapourTrails From Australia, joined Aug 2001, 1140 posts, RR: 1
Reply 17, posted (12 years 8 months 15 hours ago) and read 2164 times:
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Air France

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"Oh, I have slipped the surly bonds of earth, and danced the skies on laughter-silvered wings.." John Gillespie Magee Jr
User currently offlineMilesDependent From Australia, joined Sep 2001, 856 posts, RR: 0
Reply 18, posted (12 years 8 months 15 hours ago) and read 2160 times:

Airplanetire:

KLM have 3 747-300s.

Air France had the SUD done on a few of their 742s. JAL had it done on 1 or 2 of their 741s.

I'm not aware of any other SUD retrofits out there.

MD


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