Linked Questions

12 votes
2 answers
6k views

How is the induced drag calculated for a wing with elliptical planform?

How is the induced drag calculated for a wing with elliptical planform ? Is this wing shape the most efficient ?
Earl Quandt's user avatar
9 votes
1 answer
7k views

Why does the elliptical wing have the lowest drag?

I read that the elliptical wing has the lowest induced drag. Why is that so? I welcome a mathematical and intuitive explanation.
MrYouMath's user avatar
  • 649
7 votes
3 answers
6k views

Why are modern aircraft wings often pointed instead being more rectangular?

When viewed from the Z axis (above or below), why are modern aircraft wings often pointed as they get towards the wingtips instead of maintaining the same surface area for their entire length? This ...
End Antisemitic Hate's user avatar
2 votes
2 answers
4k views

Does an elliptical wing planform have an elliptical lift distribution, and is that the most efficient shape?

I know that there are similar topics already here, but after reading them I still do not understand everything. From what I know an elliptical lift distribution gives the least amount of induced drag. ...
Konrad's user avatar
  • 2,035
1 vote
6 answers
934 views

Why is a reduction in lift called 'drag'?

Induced drag is high pressure air 'leaking' to the upper part of the wing (low pressure zone) creating a vortex which means the area of the wing tip with the vortex can't create lift. Drag on the ...
Jessica Ham's user avatar
5 votes
3 answers
4k views

Why do tapered wings not stall at the root first?

Why do moderate tapered wings stall first at mid-wing section and high tapered wings stall at tip first? The effective AoA should be always higher close to the root? (considering no geometric or ...
user avatar
1 vote
1 answer
2k views

How to calculate the zero lift drag coefficient for a wing with data from airfoiltools.com? [closed]

I'm currently trying to write a script in python that I can use to optimalise a flying wing aircraft. I've run into a problem when trying to use data from airfoiltools.com. I've tried to calculate the ...
Remco van Woerkom's user avatar
3 votes
2 answers
948 views

Why do the elliptical and the rectangular wing show different aerodynamic efficiency?

I understand the elliptical planform is aerodynamically the most efficient type of wing planform and generates the greatest L/Dmax, but it's difficult for me to understand why. What makes the ...
lemonincider's user avatar
  • 7,565
1 vote
1 answer
2k views

How much is alpha induced angle?

I know that alpha induced rise with increasing AoA but how much is alpha induced in reality ,are we talking about 1-2 degrees or more?
ROTOR's user avatar
  • 177
1 vote
1 answer
1k views

How do you calculate the wing moment coefficient knowing the moment at each spanwise station?

A lot of theoretical formulas exist for finding the moment coefficient for airfoils, but I have been confused by how to get the moments for a wing. I came up with three related questions that have ...
Nick Hill's user avatar
  • 616
1 vote
2 answers
873 views

L/D -Bell vs Eliptical spanload?

look at this video from 18:00-21:00 ,Al Bowers talk about benefits of bell spanload compare to classic eliptical..Can someone explain what does it mean in practice examples when design aircrafts: 1)...
ROTOR's user avatar
  • 177
2 votes
1 answer
276 views

Do horizontal stabilizers on airliners have varying angle of incidence in the span-wise direction (washout or negative twist)?

Reading this question and answers, I was wondering if modern airliners with cruciform tail have some noticalbe washout or negative twist along the horizontal stabilizer's span. During cruise, if wing'...
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