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### Why did biplanes and triplanes go away? [duplicate]

Why did multi-wing aircraft (two or three stacked wings) eventually fade off to single-wing aircraft?
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### Can biplane or triplane designs be revived with modern materials?

With the new-age technologies and cutting-edge composite materials etc available currently, is it possible that biplane and triplane designs will make a comeback in the near future?
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### Why are birdlike airfoils not used?

Here are two airfoils (lets focus on Re 100,000): SD7043-il which is simple to build and has a glide ratio of about 60 e376-il a birdlike and much harder to build if using paper or similar due to the ...
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### Why are there no longer any biplanes?

Is there an aerodynamic reason why the concept of biplane or triplane has been completely abandoned? Practically all planes were biplanes in WW1, and in WW2 practically none were developed.
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### Have bi-wings been used without creating more drag?

As I understand from answers I've read here 1, 2, 3, biplanes create more lift with less wing span when compared to single wing aircraft, because the combined wings have greater surface area overall. ...
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A triplane, mainly used in WW1 on the german side, was a biplane with 3 wings. What were the advantages to having more wings? And, why don't countries use them today?
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### Would the Wright Flyer have flown better with thicker airfoils?

The Wright Flyer(s) flew with very little wing thickness,would they have flown higher, faster and longer if the wings had greater thickness? Secondly, how do thickness and camber affect a wing's ...
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### Any biplane flying wings after 1914?

Were any biplane flying wings built and flown after the 1912-1914 variants of the Dunne D.8? If not, why? Wikipedia mentions merely that this type was too stable and insufficiently controllable, but ...
564 views

### What is the best design to stack wings of a triplane?

I would like to design an ultralight airplane, which probably the total mass will be around 400kg. The speed should not exceed 200km/h. Forget about what the engine I will use. I intend it can land ...
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### What is decalage and how it affects airplane performance?

What is decalage in airplanes and how important is it in respect to airplane performance?
Would adding a slat and a slotted flap increase the of a multi element foil to 6.5? I understand, as a general rule, the max $C_L$ for a classic NACA airfoil is as follows: Base: 1.5 Slat: + 0.7 ...