Last week my cousin went to dubai for his job purpose. I went to the airport to see him off. It was my first time seeing an airplane this close. I noticed that most of the airplanes there were white. We have seen airplanes many times. Sometimes we have seen them far flying in the sky and sometimes just infront of us at airport. Most of us even traveled by airplane too. But did you ever noticed why most of the airplanes are white in colour? Let's find out. There are two main reasons for an airplane to be white.

#1 Economics

Even airlines have the right to reduce their expenditures. It requires 65 gallons of paint to cover the whole airplane. White is a standard and cheaper colour. If you don't want to use white colour. Instead you use any other colour then that colour will oxidize with the time and basically will fade out into white colour. Which means you have to colour it again. More colour means more money will be spent.

Apart from this, airplane making companies usually make it white because it sells fast. Most airlines buy it in this standard colour. Now, let's talk another reason for a plane to be white. And that is:

#2 Science

M.I.T Aeronautics and Astronautics Professor Dr R John Hansman said in an interview with Business Insider: White colour reflects the sun light more than any other colour. That's why the inner temperature of the airplane remains cool down. This is the reason we wear light colours during summer. White colour bounces back the dangerous ultraviolet radiations coming from sun. Which means white colour works as a sunblock for airplane.

According to a study of Humans-Wildlife Interaction published in 2011, birds can identify white airplane in blue sky more easily. A research by Purdue University and National Wildlife Research Center said that the number of accidents due to birds hitting with white airplanes are far less than the birds hitting with blue or sky blue colour airplane. Like humans, birds also can identify white airplane in blue sky more easily. Other than this, anyone can identify the cracks in white colour which is most important to identify for an airplane.

Why Airplanes Have Round Shaped Windows

Now as we are talking about airplanes, let's find out the answer of another question and that is "Why Airplanes Have Round Shaped Windows".

Actually airplane manufacturing companies don't make its window rounded on their own will. Instead they have to make it rounded because if they not, the airplane will be destroyed in the air. If an airplane would have rectangle or square shaped windows it would have destroyed in the air. Even this happened too. In middle of twentieth century most of the airlines started flying their planes on a higher altitudes. This idea made flying in the air less expensive. The higher you go, the less will be the air fraction. Less air fraction means less fuel wastage and smooth drive.

But there was a major problem in this idea. Due to rectangle shaped windows of planes (like buses), the plane crashing incedents were increasing day by day. Due to much difference air pressure between outer and inner environment of a plane the atmospheric pressure increases through outside. This stress hit hard on planes from outside and specially on the weaker points, for example corner of the windows.

After finding this issue an engineer proposed an idea of the rounded windows as well as pressurizing the cabin so that there would be not huge difference between inner and outer environment. Later on they implemented the idea and it worked.

Fun Fact:

Do you know why gas and liquid materials transported in a cylindrical trucks but not in rectangular? The answer is same mentioned above.

That's it for today guys. Hope you like it. If yes then: