celestar From Singapore, joined Jul 2001, 340 posts, RR: 0 Posted (11 months 20 hours ago) and read 3150 times:
Boeing has done a great job at stretching the basic design of B737.
I was looking at the latest 737 family that are currently in service, the B737-800 and 900 series look proportionally correct, however, when I look at the -700 or -500 series, I can't help but think how disproportionally big the tail fin is! It looks way too big for the size of the fuselage. If you look at the AIRBUS A320 family, from A318/319/320/321, at least to the nake eyes, the tail fin is roughly about the same size, given the different length of the fuselarge. Question, why B737-500/700 series have such a large tail? Isn't that induces drag? Is there a reason, aside from commonality of parts (which I find that to be difficult to believe), that the tail fin has to be that big? I do see on the 747-SP tail vs regular 747-300/200/100, it is bigger in size, not to mention the SP has a different wing. Please shed some light. Thanks all.
Starlionblue From Greenland, joined Feb 2004, 16524 posts, RR: 66
Reply 2, posted (11 months 19 hours ago) and read 3126 times:
As travelavnut says.
For a similar reason the 330-200/300 has a taller fin than the 340-200/300. It's all about engine out rudder authority.
Quoting celestar (Thread starter): If you look at the AIRBUS A320 family, from A318/319/320/321, at least to the nake eyes, the tail fin is roughly about the same size, given the different length of the fuselarge.
The 318 has a tail that is 76cm taller than the 319 and 80cm taller than the 320/321.
Quoting celestar (Thread starter): I do see on the 747-SP tail vs regular 747-300/200/100, it is bigger in size, not to mention the SP has a different wing.
If memory serves, the wing is the same apart from simpler flaps.
"There are no stupid questions, but there are a lot of inquisitive idiots." - from Citadel by John Ringo
Polot From United States of America, joined Jul 2011, 2004 posts, RR: 0
Reply 3, posted (11 months 13 hours ago) and read 3038 times:
I thought the tail on the -700 was the same as the -800/900 (not sure about the -500 vs the rest of the classics or the -600). It just look larger because the fuselage is proportionally shorter (unlike the A318, which actually has a larger tail then the rest of its family).