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? on ANHEDRAL, DIHEDRAL, & conventional STABILIZERS usage.
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Source：Internet Author：Unknow Pubdate：2008-04-03
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88SST56 (Marine/Ocean)
3 Oct 03 11:49
What are the determining factor that a designer uses to determine which tail configuration they use. I understand the reasons for the "T-tail configuration" when used with rear engined aircraft. Some examples of the different configurations in use are:
The Dassault FALCON 50, 90, 900, 2000 and FX all utilize the middle span ANHEDRAL style stabilizer, the FALCON 20, however, uses the slightly DIHEDRAL mid-span stabilizer. CITATION II, V, 500, and 550's all use a DIHEDRAL configuration. LEARJETS use the T-tail configuration exclusively, the HAWKER-SIDDELY 125 use a T-tail configurtion, and the anachronistic WESTWIND uses what looks like, a low conventional stabilizer. Any explaination on the positive and negatives of each configurations would be great. Thanks everyone.
corgum (Aeronautics)
3 Oct 03 17:54
字串7
A full answer is long and involved. It may help to shorten the answer if you would say why are you asking.
88SST56 (Marine/Ocean)
6 Oct 03 10:44
No specific reasons really, I just want to know if there is a criteria that dictates a particular choice. Any links to books that could provide in-depth explanations would be great as well. Thanks
Miper (Aeronautics)
9 Oct 03 3:48
Usually the boss likes one configuration or another. The design always starts there. I remember a light twin design where the President of the company wanted the tail to look like the tail on the F-5. We just about never got that to work right.
The tail's vertical placement is a tradeoff between aesthetics, tail arm, and desired distance from the propwash or jet engine exhaust. 字串6
T-tails sometimes have anhedral because that was an early solution to dynamic cross-coupling in flutter problems. T-tails don’t seem to always have anhedral anymore.
Other than that, dihedral or anhedral is usually added to a tail after wind tunnel tests in order to tailor the roll/yaw characteristics of the airplane.
88SST56 (Marine/Ocean)
9 Oct 03 9:52
Thanks Miper, that makes sense to me now. I appreciate your reply.
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