Questions tagged [vertical-stabilizer]

A fixed vertical fin or fins that provide an aircraft with passive directional stability (keep it from spontaneously yawing sideways into a sideslip), and often serve as the mounting point for the aircraft's rudder(s).

Filter by
Sorted by
Tagged with
1
vote
2answers
190 views

What are the effects of placing the vertical stabilizer at the front of the aircraft? [duplicate]

I am experimenting with different aircraft designs. The one I am trying right now is a canard (horizontal stabilizer at the front) and the main wings are quite far back. I wondered if it would be of ...
12
votes
2answers
3k views

Why are there double hinge lines on the rudders of the Grumman C-2?

Why are there two sets of hinge lines on the rudders of the Grumman C-2? A photo from the related ASE question Why does the C-2 left inboard stab not have a rudder? Why would two hinge lines provide ...
0
votes
2answers
88 views

What is the purpose of the fin sweep on small piston airplanes? [duplicate]

Why some small piston airplanes, like Cessna 152/172, Tecnam P2008 and many more, have the vertical stabilizer with a sweepback? I don't think that those airplanes may encounter compressibility ...
-2
votes
3answers
190 views

Have an airliner's vertical or horizontal stabilizers or rudders ever broken off?

For a commercial airliner, how strong and reliable are the vertical and horizontal stabilizers and rudders? Can they just break off?
0
votes
1answer
58 views

For a coaxial rotorcraft, Do horizontal and vertical stabilizers in the tail really make much of a difference?

Can we design a coaxial rotorcraft without tail and tail boom completely? What might be the consequences?
2
votes
1answer
273 views

How do I choose the vertical tail's airfoil?

I'm designing a fixed wing UAV and I'm having some doubts about how to determinate the vertical tail airfoil. It's important to say that we've already sized this surface. And till this moment we're ...
2
votes
2answers
205 views

How far away should the vertical stabilizer be from the leading edge of the main wings?

I am wondering what the advantages and disadvantages are of placing the vertical tail nearer to, or farther from, the main wing. For instance, when the vertical tail is just behind the wing, do the ...
1
vote
3answers
273 views

How does vertical stabilisation work?

I know that similar questions are available all over the internet, including this website. However, none of the answers make full sense to me. I'm looking for simple answer (explain-like-I-am-5 type ...
0
votes
1answer
1k views

What is this mysterious thing on the vertical stabilizer of the Boeing 707?

Have you ever seen this mysterious line-shaped thing on the vertical stabilizer of a Boeing 707 or 720? What purpose does this thing do?
10
votes
2answers
857 views

Why was the tip of the B-52's vertical tail chopped off in 1959?

When Boeing switched over from the B-52F to the B-52G in 1959, they (among other changes) lopped off the top 2.4 meters (8 feet) of the aircraft's vertical tail: Original-height tail (here on a B-52F) ...
7
votes
2answers
418 views

What is the aerodynamic reason that the An-225's vertical stabilizers are not simply vertical?

I am trying to understand the aerodynamic consideration that the two vertical stabilizers of this gigantic Antonov An-225 are not simply made vertical and are slightly pointing in. Then my questions ...
14
votes
2answers
428 views

Why is a blunt trailing edge a better stabilizer at hypersonic speeds?

Here is what I read about the X-15 spaceplane: The X-15 had a thick wedge tail to enable it to fly in a steady manner at hypersonic speeds.[14] This produced a significant amount of drag at lower ...
0
votes
1answer
139 views

At what angle-of-attack (sideslip angle) would a symmetrical vertical fin stop “helping” a deflected rudder produce sideforce? [duplicate]

For rudder deflection angles of 5, 10, 20, 30, and 45 degrees, at what (negative) angle-of-attack does a fin-rudder combination (including dorsal fin if present) create exactly the same amount of ...
2
votes
2answers
981 views

Is it useful for twin propeller airplanes to have twin vertical stabilizers, in line with the propellers?

In some twin propeller airplanes, there are two vertical stabilizers which are on the same line as the propellers. Is this shape helpful in terms of efficiency? Like this one (twin boom tail):
6
votes
3answers
1k views

Why are Vertical tails generally tapered?

I'm just intrigued to know why the vertical tail of a majority of aircraft is tapered? Is it due to aerodynamics, structural design or due to some instrumentation or multiple other reasons?
7
votes
9answers
3k views

Is a vertical stabiliser needed for straight line flight in a glider?

My team is designing a glider and I am unsure about whether or not to include a vertical stabiliser. The task the glider must complete is to achieve the largest possible displacement in a straight ...
5
votes
2answers
2k views

What is a rudder or fin stall?

What is a rudder or fin stall, how will the aircraft behave in that situation, and how should the pilot recognise it? What is the recovery procedure? And what is rudder reversal?
5
votes
3answers
583 views

What is the correct procedure in case of vertical stabilizer failure?

What is the correct procedure in case of vertical stabilizer failure in cruise? Am I correct in guessing that one should descend to a lower altitude and decrease speed?
4
votes
2answers
3k views

What is the difference between a vertical stabilizer and a rudder?

I saw two questions on locating these surfaces ahead of CG: Vertical Stabilizer and Rudder How are these the same or different control surfaces?
3
votes
4answers
991 views

Why aren't there aircraft with forward-mounted vertical stabilizers? [duplicate]

Many aircraft have the horizontal stabilizers mounted in front of the main wings (this is called a canard configuration); however, to the best of my knowledge, there don't seem to be any aircraft with ...
18
votes
1answer
2k views

Why does the C-2 left inboard stab not have a rudder?

As visible in the following picture (wikimedia.org) the left inboard stabilizer doesn't have a rudder but the right one does. Wikipedia on the C-2 describes it as: The C-2 has four vertical ...
5
votes
2answers
2k views

Is there a formula to calculate how big a ventral fin should be?

I've been doing some research into vertical stabilizer designs for a university assignment and have come across ventral fins. I've found a fair bit of information on why they're fitted but can't find ...
14
votes
3answers
7k views

Why are the leading edges on the Boeing 787 made from aluminum?

Why are the leading edges of the wings, horizontal stabiliser and vertical stabiliser and the engine's inlets made from Aluminium?
4
votes
2answers
649 views

Could the vertical stabilizer be removed on the NASA X-57?

I was reading this article about how NASA will develop this new X-57 X-plane which has many tiny electric motors mounted on the wing. Now, I wonder: How come this aircraft still has a vertical ...
0
votes
2answers
514 views

Has there been research into alternatives for the vertical stabilizer?

Are there some activities in research for replacing the vertical stabilizer with a turnable horizontal stabilizer? (flight direction stabilization like the birds)
2
votes
2answers
2k views

How can a flying wing style airplane recover from a spin without a vertical stabilizer? [duplicate]

I fly a Cessna C-172, and if I have any bank when stalling, I have to use rudder to level the airplane. If I use aileron, the bank angle will increase and bring the airplane into a spin. My question ...
23
votes
1answer
2k views

What are the spiky things on the back of the Antonov-225 vertical stabilizers?

On the Antonov-225's split vertical stabilizers, there is a 'spiked' structure pointing directly rearwards (as you can see below). What is the purpose of these two structures? source
10
votes
5answers
4k views

Why doesn't the A320 have a dorsal fin like the 737?

The A320 doesn't have a dorsal fin, but the 737 does. If the 737 is more or less a similar aircraft, why doesn't the A320 have a similar dorsal fin? By Bill Larkins [CC BY-SA 2.0], via Wikimedia ...
2
votes
1answer
792 views

Are the panels in this vertical stabilizer part of the flight controls?

I've noticed some sort of "flight controls" on an A319 vertical stabilizer. Here's the original photo What are those things? Are they used for controlling the movement of the aircraft? Source: ...
36
votes
2answers
7k views

Why do aircraft need a vertical tailfin, but birds don't? (and lots of fish do?)

I don't know of any bird that has a vertical tailfin, but apparently aircraft need them for lateral stability. Why is this? I did realize, however, that most fish have a vertical tailfin, or a ...
7
votes
2answers
3k views

Why is the DC10/MD11/TriStar vertical stabilizer noticeably smaller than other contemporary aircraft?

Why is it that these planes had vertical stabilisers that were noticeably smaller in proportion the aircraft itself to other aircraft? I understand that they had the engines mounted on the tail but ...
8
votes
1answer
620 views

Do vertical stabilizers create vortices like wingtips do?

On a wing, a wing tip vortex is unavoidable no matter what configuration you use, but does a vertical stabilizer form a wing tip vortex? I noticed this picture and saw two vortices coming off of the ...