Linked Questions

17
votes
4answers
4k views

Why does rudder cause roll?

In the few rudder incidents with the B737, rudder-freeze caused the airplane to roll. From what I know, the rudder causes yaw while the aileron causes roll. Why in the case of these accidents/...
18
votes
3answers
7k views

Why do some military aircraft use variable-sweep wings?

There are a couple of American military aircraft (the retired F-14 and the B-1 come to mind immediately), that have variable swept wings. I know that they keep the wings full out (roughly ...
35
votes
2answers
5k 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 ...
18
votes
3answers
11k views

How does a flying wing keep from going into a flat spin when maneuvering?

How do flying wings, like the B-2 Stealth bomber, actually keep themselves from yawing out of control without a vertical stabilizer? For the record, I assume this has to be a simple mechanics process....
14
votes
2answers
11k views

What is the reason for the poor low-speed characteristics of sweptback wings?

I know there are advantages of swept-back wings delaying shock-wave allowing a aircraft to fly faster. However, what are the disadvantages. I know one of them is that they have very poor low speed ...
9
votes
4answers
3k views

Do all aircraft need to have horizontal and vertical stabilizers?

Are (or were) there any operational aircraft that don't have horizontal and vertical stabilizers or canards? If so, what's the effect on how they fly?
7
votes
5answers
477 views

How to recognize the horizontal winglet in the Horten design, or the experimental glider in this video?

Comments below the NASA Armstrong Flight Research Center video Proving Prandtl- With A Twist! incclude: This video is entirely a hidden jewel in youtube, it deserves much more attention than ...
7
votes
3answers
2k views

How do flying wings respond to crosswinds?

Is the vertical tail the primary reason for causing landings to be skewed in a crosswind? Please explain the effect of the fuselage, the tail, or other components. If the vertical stabilizer is the ...
9
votes
2answers
4k views

What is the optimal wing sweep angle for a passenger airliner?

There are many different types passenger planes, but is there a optimal wing angle for these planes, that improves the plane's take off speed for example, or the fuel efficiency The Boeing 747 has a ...
6
votes
3answers
6k views

What is the way to calculate the required twist of a flying wing?

I am interested in flying wings and a couple of weeks ago I started researching them. I found mh-aerotools.de website and think it's a great source. The website stated that flying wings need twist ...
7
votes
1answer
6k views

What is the best design for a small flying wing with special flight envelope?

I'm designing a small, light and portable flying wing UAV that will launch and land vertically via a Tilt-rotor system. I'm attempting to use the program XflrV5 but am having difficulty understanding ...
5
votes
2answers
8k views

Where is the spanwise flow? How does the span wise flow point the air towards the wingtip?

If you search Google for span wise flow, the first result under the pictures tab is a image of a wing with the span wise flow at the trailing edge: (Source) If you look at some other photos you ...
5
votes
3answers
426 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
1k 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 ...
2
votes
5answers
313 views

Was the adoption of conventional tailplanes as 'everyday aircraft' inevitable, or are there other designs that can be just as good?

I originally asked a variant of this on Worldbuilding.SE, but they didn't seem to like it. So I apologize if it's out of place even here. I ask, because I've been forming in my head an alternate ...

15 30 50 per page