Question

19. The shape of an aeroplane is like a ...
(A) Car
(B) Bus
(C) Dog
(D) Bird​

Answer 1

Explanation:

${\huge{\pink{\fbox {\purpe{\boxed{\red {\mathrm{BIRD}}}}}}}}$

The Wright’s had a lot of trouble with stability in their early trials. They continued to observe birds and figured out the importance of the tail and tried to mimic features of it to gain stability.

This brief answer comes from my remembrance of reading a biography of the Wright brothers, not from a study of aeronautical engineering. Two things are especially notable:

The basic wing shape with a curve causing lift came from observing the shape of a bird’s wing.

Today, virtually all airplanes have these two features, since airplanes all share a common “designer”, man. They look different, have different sizes, and have some very different features, because that designer used intelligence to design airplanes for different requirements and furthermore incorporated advances in some aspects knowledge.

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Answer 2

$\large</strong><strong>\</strong><strong>b</strong><strong>o</strong><strong>l</strong><strong>d</strong><strong>\</strong><strong>red{Bird}$

Airplanes have wings, just like birds. They also have a light skeleton (or framework) to decrease their weight, and they have a streamlined shape to decrease drag. ... Airplane wings are designed to create lift by changing the pressure, rather than by flapping them up and down.