Apuneger From Belgium, joined Sep 2000, 3032 posts, RR: 11
Reply 4, posted (13 years 1 month 3 weeks 5 days 23 hours ago) and read 5223 times:
When looking at them from sides, it's EZ (length, registration,...), but when looking to one, flying directly over you, it's definitely harder to tell. As a matter of fact, I'm not 100% able to tell whether it's a -300,-400 or -500, just by looking to a 737 flying over my head.
Godbless From Sweden, joined Apr 2000, 2752 posts, RR: 15
Reply 6, posted (13 years 1 month 3 weeks 5 days 22 hours ago) and read 5208 times:
talking about the Lufthansa 737s... You can tell it very easy since on the 735 the name "Lufthansa" ends over the wing while on the 733 the titles end in front of the wing... Btw: the -400 is easy to tell because it has two exits over the wing. ...Well that could then also be an -800 or a -900...
Notice there are about 1/2 as many windows on the -500. If you are looking at the aircraft at a perpendicular angle, you will also notice more windows aft of the wing, but it is much more defined in a comparative view with a -300. It is easiest, however, to just look at the forward set of windows ahead of the duct. If they look unusually small in number, then it's a -500. I believe the ratio is 12/6 for windows (as -300/-500) for the section forward of the a/c duct. That is a structural property and will not vary from customer to customer unless the windows have been plugged or it is a dedicated freighter. Therefore, if it is a passenger plane, the amount of windows is a sure bet to tell you which is which.