Linked Questions

3
votes
2answers
394 views

What is that protruding fuselage part? [duplicate]

Circled in red above, I suspect that's a high-lift device meant to improve handling at takeoffs and landings, but I don't know for sure really. What is its name and uses?
1
vote
1answer
272 views

What is this feature on a Piaggio P.180? [duplicate]

(wikimedia.org) What is this feature on a Piaggio P.180? I believe it's called a dolphin tail, but why is it exactly there and what is it for and why don't all airplanes have this?
44
votes
3answers
17k views

Why does supersonic flight detach airflow from a wing?

I've read in several answers to questions that when a wing passes the speed of sound the airflow will become detached from the craft towards the rear quarter of the wing (thus making things like ...
26
votes
3answers
5k views

Why does an airliner fuselage have a constant section over its length rather than a tear drop shape?

It is usually stated than a tear drop shape is a good shape for aerodynamic efficiency: Adapted from Nasa On the other hand, fuselage on an airliner has most of the time a long cylindrical section ...
19
votes
3answers
26k views

What is the purpose of a dorsal fin such as on the Boeing 737?

I've noticed that the 737 has a rather unusual vertical stabilizer, with an extension at the front. Is the 737 the only plane equipped with such a vertical stabilizer, and what is its purpose?
19
votes
2answers
22k views

How does chord length affect wing design?

In comments on the answer to a question about transonic speeds and control surfaces I came across this comment and I'm having a hard time understanding it. If you increase the chord, lift goes up ...
9
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 ...
7
votes
3answers
3k views

What airframe design is best for stormy weather?

Consider picking a plane for weather study. This plane will intentionally fly into weather systems (e.g. inside the eye of a hurricane) to collect scientific data. It will be equipped with on-board ...
9
votes
5answers
912 views

Do most commercial jets have a negative lifting body?

I took a look at some example airfoils and noticed they all seem to have a downward hook at the end. I believe this draws the air downwards, creating a reaction force upwards: lift. Now here is a ...
7
votes
2answers
3k views

Would a vertical stabilizer that extends both above and below the centerline be benefit or hindrance?

Ignoring for a moment potential schematic difficulties in creating an aircraft that can land and take-off without threatening a downward vertical stabilizer, would a vertical stabilizer that extends ...
6
votes
2answers
2k views

Is there a parameter that links the areas of the fuselage and control surfaces? [closed]

Do aircraft designers look at the ratio of how much fuselage surface area can be loaded onto a given unit of wing and tail surface area including elevator, aileron, rudder etc? (Possibly, the surfaces ...