Monday 12 August 2019

KNOW WHY AUTOMATIC TRANSMISSION VEHICLE GIVES LESS MILAGE THEN MANUAL TRANSMISSION VEHICLE !!


You might have wondered why 100cc scooter gives less mileage than 100cc manual transmission bike. Think about it where a 100cc scooter returns mileage near 40-50 Kmpl, an average 100cc motorcycle provides mileage over 60 Kmpl. The answer to this question lies in the transmission used where the scooters use automatic CVT transmission, while motorcycles use a proper 4 or 5 speed manual transmission.We will discuss about the reason behind this in this article.

Lets start with the purpose of a gearbox. The engine of a vehicle runs at a certain rotary speed or revolutions per minute ( RPM ). The required speed of revolution of the wheels is usually much less than that. For example, a typical 100cc bike engine can rev upto 6000rpm, but if the wheels ( 18 inch dia ) of a typical 100cc bike move at that speed, it would reach a velocity of 518 kmph!
So basically the gearbox is the intermediate mechanism which allows the engine and wheels to run at different rpm. 





The scootys use a system called a Continuously Variable Transmission ( CVT ), which in its simplest form is just a a cone pulley system with belts which allows for automatic adjustment of speed. The 100cc bike on the other hand has a manual gearbox, which requires you to manually select an ideal gear ratio for the given speed. Usually bikes have 5 gear speed ratios to choose from nowadays and they are thus called 5 speed gearboxes. 




Fuel economy depends on your RPM. The lower the rpm, the better fuel economy. Bikes with gears allow us to shift into higher gears and by doing so, the rpms decrease.At a given speed (say 40kmph), when in higher gear (4th gear), the bike has lesser rpms as compared to it going at same speed (40kmph) in a lower gear (3rd).In a gearless scooter, the rpms just keep building up continuously. So it has lesser fuel economy.
 



Also, another major contributor to this is the fact that gearless scooters have a centrifugal clutch. In such a system, as the speed is building up, the centrifugal force acting on the clutch increases. Thus, it always remains partially engaged (detached from the input shaft). This translates into power loss and thus lesser fuel economy.  

 
The clutch is not controlled by the rider, it works automatically, and the clutch is also a pretty inefficient unit which draws its power from none other than the engine. This results in more loss of power and to make that up in terms of performance, the efficiency of the scooter takes a hit.


But most consumers don't mind because of the convenience of not shifting gears manually seems a fair trade-off. However, automatic transmissions are getting more high tech as we speak, and very soon this difference in efficiency will be negligible. 

KNOW WHY NEW TEST VEHICLES ARE CAMOUFLAGED !!

We have all seen photos of anticipated upcoming models wrapped in black padding and crazy checkerboard and swirl patterns, and might have wondered if all that is really necessary.We will discuss the reason behind wrapping the new cars in this article.


While much of a new car or truck’s development happens behind closed doors, there’s no substitute for real-world testing on both private tracks and public roads, at which point a test vehicle – called a “mule” in automotive language.After manufacturing every vehicle has to be tested on road to see how it behaves.


To travel in public , automotive engineers for decades have employed visual deception which is known as camouflage to disguise what they are working on or testing from the eyes of always interested and ever-present media and competitive automakers.



Camouflage is important to automakers as they develop and test vehicles, for a variety of reasons. An accidental early look at a new design can impact the sales of existing vehicles as consumers compare their current purchase considerations to those on the horizon.

The camouflage is there to deceive your eyes. Most car companies use them to protect the design of their, soon to be released, cars. The camouflage hides any sleek edges and doesn't give a clear look into the car's details. No, it doesn't necessarily hide the car as a whole and they are usually easy to distinguish what type of car it is. But, it does hide their new design.




Lets compare, we'll use the 2016 Honda civic as an example. Look specifically at the hood. notice any fine details to the hood like raising or lowering sections? You can also see this "illusion" in the grill of the car, where the Honda logo would be located. and lastly look towards the sides of the doors, notice how the non-camouflaged one looks to cave-in more towards the bottom.


The last thing a manufacturer wants is for its upcoming model to create a market that it is not ready to fill. Worse yet, when the car is finally released, its design can feel stale because the internet and magazines have been publishing pictures of it for a year or two. 

Sunday 11 August 2019

COMMON DIFFERENCE EXPLAINED !!

DIFFERENCE BETWEEN RESUME AND CV:

A curriculum vitae (CV) provides a summary of your experience and skills. Typically, CVs for entry-level candidates are longer than resumes – at least two or three pages. CVs for mid-level candidates who have amassed numerous publications tend to run much longer. CVs are thus lengthier than resumes, and include more information, particularly details related to one’s academic and research background.

A resume provides a summary of your education, work history, credentials, and other accomplishments and skills. There are also optional sections, including a resume objective and career summary statement. A resume should be as concise as possible. Typically, a resume is one page long, although sometimes it can be as long as two pages.


DIFFERENCE BETWEEN GUARANTEE AND WARRANTY: 

Guarantee is a commitment made by the manufacturer to the buyer. Just like a guarantor stands behind a loan, the manufacturer stands behind the product. If a product under guarantee is of low quality, it will be either repaired/replaced, or the money paid will be refunded to the buyer.


Warranty is an assurance given by the manufacturers to buyers, that if the product breaks or if there is any problem with the product, the manufacturer will repair the product for free.



DIFFERENCE BETWEEN WATER RESISTANT,WATER REPELLENT AND WATER PROOF:

Water-resistant, this is the lowest level of water protection of the three. If a device is labeled as water-resistant it means that the device itself may be built in such a way that it is more difficult for water to get inside of it, or possibly that it is coated with a very light substance that helps improve the device’s chances of surviving an encounter with water. Water-resistant is something you see commonly among watches, giving it the power to withstand the average hand-washing or light rain shower.

Water-repellent, which is basically just a step up from water-resistant. If a device is labeled as water-repellent it actually possesses the properties in which to, you guessed it, repel water from it, making it hydrophobic. A water-repellent device stands a very high chance of being coated with some form of thin-film nanotechnology, whether that is on the inside, outside, or both, and has a much better chance of standing up to water than your average device. Many companies claim water-repellency, but the term is heavily debated because of all the questions and unpredictable elements associated with it.

Waterproof, on the other hand, describes materials or products that can stand complete submersion without taking in any amount of water. They are suitable for camping, swimming, snowboarding, diving, and many more activities since they can be waterproof to great water depths for a long time. The nature of a waterproof product or material is that it is made with absolutely no holes or pores that might let in water. These products are specifically made for use in environments that have plenty of water. However, on the market today, there are a lot of products that are labeled waterproof but aren’t really waterproof – especially electronic devices. This is especially so because different products have different ‘scales’ or ‘levels’ that determine what should be labeled as waterproof or water-resistant.