Airplanetire From United States of America, joined May 2001, 1809 posts, RR: 2 Posted (14 years 4 months 1 week 20 hours ago) and read 3763 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.
ATA L1011 From United States of America, joined Feb 2001, 1453 posts, RR: 6
Reply 3, posted (14 years 4 months 1 week 17 hours ago) and read 3630 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.
Aamd11 From UK - Wales, joined Nov 2001, 1068 posts, RR: 1
Reply 5, posted (14 years 4 months 1 week 11 hours ago) and read 3532 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.
Fanofjets From United States of America, joined Apr 2000, 2144 posts, RR: 3
Reply 6, posted (14 years 4 months 1 week 10 hours ago) and read 3515 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
Planelover From United States of America, joined Dec 2001, 321 posts, RR: 0
Reply 8, posted (14 years 4 months 1 week 10 hours ago) and read 3504 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!
That's what I think.
Tom_eddf From Germany, joined Apr 2000, 454 posts, RR: 0
Reply 9, posted (14 years 4 months 1 week 4 hours ago) and read 3476 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...).
Ganymed From , joined Dec 1969, posts, RR:
Reply 12, posted (14 years 4 months 1 week ago) and read 3436 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
A40-TY From United Arab Emirates, joined Apr 2000, 143 posts, RR: 0
Reply 13, posted (14 years 4 months 1 week ago) and read 3417 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.