Questions tagged [empennage]

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3 votes
1 answer
180 views

Why do so many UAVS use a V-tail configuration?

How different is V-tail from a conventional tail in the perspective of aerodynamics & flight dynamics of aircraft? I have seen that many UAVs, like the General Atomics MQ1 Predator, LSI Amber, ...
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6 votes
1 answer
1k views

What is this part in Embraer Legacy 650 and what is it function?

The picture I took from here. If you want to see, just click the link, it will take you to the part I want to show and ask. What I want to know is its name and its function.
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1 vote
1 answer
132 views

Do aircraft usually fly with CG at 50 percent of chord or do I need to reduce the tail volume?

I'm working on a design having a 3.2-metre wing with a constant chord section in the middle and taper on the sides. With a tail volume of about 0.68, the neutral point is at 60% chord from the leading ...
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1 vote
1 answer
238 views

Does the tailplane see a higher or lower airspeed than the wing?

The sweepback angle of the horizontal stabilizer is greater than that of the wing. I assume this is to reduce compressibility effects, but it would only make sense if the tailplane sees a higher ...
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3 votes
0 answers
79 views

Are empennage airfoils always symmetric in conventional airliners?

I'm specifically interested in these models: A319, B737-700, A220, E195-E2. You could call these conventional airliners, so I suppose the question is if these "conventional" planes have only ...
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3 votes
1 answer
271 views

Why does the Cessna 208 Amphibian have extra tail surfaces?

Mark Harkin, CC BY 2.0, via Wikimedia Commons I've seen extra tail surfaces that look like additional vertical stabilizers on the C208 Amphibian. Why is there a need for this? I can't imagine that ...
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  • 2,414
1 vote
1 answer
222 views

Is there a better solution than the U-shaped tailplane for this Airbus concept?

Image source: airbus.com This U-Shaped tail is from a concept aircraft from Airbus, I was wondering if there is an alternative but just as good solution to the U-shaped tail. Using a canard in the ...
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1 vote
0 answers
21 views

How to calculate the the variation of Cl wrt the angle of defection of the elevator?

I've checked the lift requirements of the aircraft and selected an optimal airfoil and designed a wing with dimensions of MAC 47cm and semi-span of 163.2 cm and a airfoil S1223. The horizontal ...
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  • 11
2 votes
2 answers
421 views

Materials usually used in dorsals fins specifically in the ATR 72

I am an aerospace engineering student and I am having problems finding information about the materials usually used in the dorsal fin of an aircraft. I would also like to know the kind of stress and ...
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7 votes
2 answers
1k views

Why do some T-tail aircraft have a protrusion on the top front of the tail? [duplicate]

Aircraft like the Tu-154 and VC-10 have a "point" on the T-tail, while others like the 727 do not. Is this structure a shock body, or otherwise related to the tail's aerodynamics? And why is it only ...
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