This question can also apply to ther A/c that have more or less the same shape of tail as the 737's: Fokker 70,100, E170, 190, etc.
As you may all know the 737(except the 100 and 200 series) have this sort of extension to the tail on its bottom part which I think is called the tail bumper!
I was wondering what the shape of the tail meant aerodynamically as compared to the othe type of tails without the bumpers is the case with most other commercial airliners. If its efficient then why do bigger a/c not have them or even similar sized a/c like the A320 ?
Would anyone be able to explain it to me,
Photo © Krzysztof Godlewski (EPGD Spotters)
Photo © Julian Adams
[Edited 2007-03-25 10:18:11]