BMW interesting facts

Originally, BMW was an airplane engine manufacturer!!! Surprised to hear this? Yes, thats true. Top class car manufacturer BMW is a business entity of Rapp Motorenwerke. The company which was creating aircraft engines in 1917. BMW was forced to stop aircraft engine production by the terms of Versailles Armistice Treaty. The Treaty of Versailles was one of the peace treaties created at the end of World War I to finish the state of war between Germany and the Allied of Powers.

After stopping engine manufacturing, BMW switched to Motorcycle production in 1923 once the restrictions of the treaty started to be lifted. And finally BMW jumped into automobile business in 1928-29.

Do you know BMW's Logo is derived by company's first business, Rapp Aircraft Engine Manufacturing?

BMW logo is registered in the named of "Roundel".

The BMW emblem represents the colors of Bavaria and is an adpatation of the original RAPP trademark when BMW acquired all assets of RAPP MOTORENWERKE the engine manufacturing company. Here is a "Line-Art" render of the BMW LOGO STYLE GUIDE.

Here we have the original RAPP Logo; a dark horse or a Knights Chess Piece Bust, represents Horse Power which is the accepted European unit of power for rating engine frequency and rate of piston generated energy throughput. During the first world war, this very profound symbol represented gallantry, masculine power and of course speed and agility.

The Blue and White color in the logo represent the colours of the Free State of Bavaria.

There is a myth that BMW logo represents Engine Propeller. This myth devloped when BMW in 1929 twelve years after the Roundel was created released following picture. The picture represents the circular blue and white BMW logo (roundel) as the movement of an aircraft propeller, to signify the white blades cutting through the blue sky.

Following Video is released by BMW which demonstrates evolution of BMW Logo (Roundel):



Some of the interesting use of BMW Engines:

"Rail Zeppelin" by Frank Kruchenberg, driven by a BMW aircraft engine that brought the train speed to a record-breaking 145 MPH in 1931.

Now a days, BMW engines are used in Small Aircrafts:

BMWJet Engine used in Brutus 545:

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Posted in: Sci-Tech

Phones which knows how you walk

Researchers in Oulu (Finland) are now a day busy in defying thieves. How? Lets explore by visiting Oulu which is located in Finland. Travelers can enjoy summer in Oulu but in Winter when sea will be frozen only a mad guy would dare to visit this place. But when we came to know that researchers in Oulu are busy in inventing a device which will almost stop Mobile theft even when you are drunk, we could not resist visiting this place and exploring the whole story. Related to this we met one Professor (name could not be disclosed) in Oulu who is Identification expert but he never uses old methods like finger prints or iron scan to identify thief. Instead, he relies on his new invention which will identify thief by the way he walks.


Professor believes that mobile phone theft is a big problem. For example 5% of the burglary in UK is related to Mobile phone. And professor is busy in searching a way how to handle this problem. His biometrics devices are equipped with advanced technology which can sense the way you walk. Your phone could be in your pocket or bag monitoring your day to day activities. Phone will sense the way you walk and if someone will lift it from you then phone will come to know that it is in wrong hands and immediately locks itself. Professor and his team have done lots of experiments to know whether such ideas will really work in real life or not.

A small motion sensor will be installed in your smartphone which will recognize the way you walk by using 3 directions. For Left and Right Yellow line, For Up and Down Red Line and For Forward and Backward Green line. This device is invented in such a way that when you are walking, your way of walking will be recorded into this device.

Similar to our voice, every person has different way of walking. Suppose I am a thief and I steal someone’s mobile phone then mobile phone will immediately recognize that I am not the owner of the phone. How does this idea work? Every human being have different walking style and this depends upon various factors like shape and size of our skeleton, what is my sex and what are my muscles shape and size. Even our mind also plays very important role in the way we walk. It’s been believed that a happy man will have different walking style then others. This invention is still in its premature stage, but experiments so far divert this on positive note.


There are few challenges to implement this invention. Like when we walk on Ice our walking style will be different. This technology would be a trouble for people staying in such regions. Also, when you are drunken you not only forgot yourself but you forgot the way you walk. But researchers have a very simple solution for this. In case the phone gets locked, you can simply enter the pin code to unlock it. But what if you are tired and going through a depressive stage? In this case chances are there that you forgot your pin. And probably this is the biggest problem with this design.

What do you think about this technology? Our future smartphones should be equipped with this? Write in your comments.

Our Inspirations:
Nokia Blog
Technology Review

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Posted in: Sci-Tech

How to find out Human Head Weight?

How much your head weighs? If someone asks this question, it seems to be funny to us. But did we ever try to get answer of this question? How can I weigh my head?
Well, sometimes answer to this question may be terrible as well!!! Because some people might think that to weigh a head, I should ask some magician who will detach my head, then weigh it and again fix it.










What about lying down and placing head on a scale?













Thank God, Science has answer to it. So we should not rely upon above solutions.

1. Get a (very) large metric measuring tub placed into another tub and a friend.

2. Ask him to tie a rope on your leg and hang you upside down.



3. Fill the tub with enough water to fully submerge your head.

4. Make sure the tub is fully filled with water and allow some time so that water gets rest.

5. Ask your friend to drop you down, so that your head is completely dunked into the water. You’re your mouth closed and puckered to get rid of as much air as possible.



6. As soon as had dunks into the tub, excess water will come out in the outer tub.

7. Now, measure volume of water displaced in cubic centimeters. Water has a density of 1 gram per cubic centimeter. Thus, the volume of displaced water in cubic centimeter should be equal in number to the mass of the displacing object in grams. Here, displacing object is our head.

Why This Method?
Water is major and important things to all living beings. In some organisms, up to 90% of their body weight composed of water. Talking about Human body, Up to 60% of the human body is water, brain is composed of 70% water and lungs are nearly 90% water. Lean muscle tissue contains about 75% water by weight, as is the brain; body fat contains 10% water and bone has 22% water. About 83% of our blood is water, which helps digest our food, transport waste, and control body temperature. And finally Scientists have discovered that Human Head consists of 90% of water.
Hence, this method will give you 90% accurate results. Average Human Skull weighs around 4 to 5.5 KG.
So, next time when your friends ask you question that how much your head weighs. Don’t forget to follow up TechSac suggested method.
Do write in your comments and Don’t forget to share this article with your friends if you liked it.

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Posted in: Sci-Tech

Why buttered toast falls butter side down?

Have you ever observed a Buttered toast? A Buttered toast that is falling from your dinning table, kitchen table or platform where you often butter your bread slices. If you have observed it carefully you will find that the toast has fallen to the floor - butter side down!!!!

In ancient Rome, parents apparently visibly worried about their children's toast falling and landing buttered-side down, since the breakfast table accident supposedly forecasted as bad luck. So, does a floor mysteriously favours butterry side? Or Butter is so heavy that it always flips bread and make it fall - Butter side down? Or Any Other Myths?

Lets explore from Physics point of view, Why Buttered toast falls butter side down?

As per law of physics it all depends how you drop bread slice, from where you drop bread slice and how big is your toasted bread slice. All of this technical factors contribute in deciding whether a toast should fall butter side up or butter side down.

Now, lets analyze why this happens?
Most of the time when we place our Buttered Toasts, Buterred side will be always up. As most of the kitchen tables and work surfaces like kitchen platforms are about waist height. When buttered toast falls from such surfaces, it can manages 180 deegrees rotation or you can say half rotation before it hits the floor. And result is butter side down.

What should be done to make fall toasts, buttered side up?
Answer is simple.
1. Better build your work surfaces twice as high Or
2. Make smaller bread slices so that they have time to complete the rotation.

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Posted in: Sci-Tech