Wednesday, January 06, 2010

Gyaan...

We were discussing about the commercial aircrafts and how it was a dream to go by airplane in last decade and how it has become a necessity now......:)
The next things that came into my mind was , how fast the journey has become for all of us , it requires just few hours to be at any destination in our country ( provided the airport is near J )….it’s like was having snacks in office few hours ago now eating "maa ke haat ka bana hua khana" for dinner J gr8 isn’t it?
Let’s be thankful for the people who made theses flying machine what they are and also for them who made it affordable.
Any way talking about the speed of these aircrafts , I realized I don’t know much what speed the commercial aircrafts fly? Which is the fastest Aircraft in the world?? What’s the measure of speed for aircrafts , is it KMP , MPH or anything else?
So I did what any normal urban human being will do , I Googled it J , hence sharing about few things I think we all should know…..

Commercial airplanes used in INDIA :
Airbus A320 : Maximum speed Mach 0.82 with seating capacity varying from 230 to 400 people at a time J ( Kingfisher ) Boeing 737 : Maximum speed Mach 0.785 with seating capacity varying from 255 to 420 people at a time J ( JET) Boeing 747 : commonly called a jumbo jet reaches cruising speeds of 885 km/hr (747 continues to be the world's fastest subsonic jetliner, cruising at Mach 0.85 -- or 85 percent of the speed of sound)

Now this brings us to the another question what is the measure to calculate speed of the airplanes , hmm you must have at least heard MACH ( Gillette Mach 1 shaving blade if not atleast BSA bicycle name "Mach 1" ), So do you know what 1 Mach equals to??

Let’s know what this MACH actually is…………………..
MACH :
Mach number (Ma or M) (generally pronounced /ˈmɑːk/, sometimes /ˈmɑːx/ or /ˈmæk/) is the speed of an object moving through air, or any fluid substance, divided by the speed of sound (1225Km/h) as it is in that substance. The Mach number is named after Czech/Austrian physicist and philosopher Ernst Mach.
As you know MACH defined as a ratio of two speeds, it is a dimensionless number , but we can say 1 Mach is approximately equals to the Speed of Sound i.e. 1225 Km/h.
But as the speed of sound increases with the temperature the value that 1 Mach represents can vary accordingly .
Any idea which commercial aircraft was the fastest , yes "Concorde"

Concorde :
The Aérospatiale-BAC Concorde aircraft was a turbojet-powered Supersonic passenger airliner which flew regular from London Heathrow (British Airways) and Paris-Charles de Gaulle Airport (Air France) to New York JFK and Washington Dulles, flying these routes at record speeds, in less than half the time of other airliners.
Concorde had an average cruise speed of Mach 2.02 (about 2,140 km/h or 1,330 mph) with a maximum cruise altitude of 18,300 metres (60,000 feet), more than twice the speed of conventional aircraft.

Unfortunately Concorde is no more L - On 10 April 2003, Air France and British Airways simultaneously announced that they would retire Concorde later that year. They cited low passenger numbers following the 25 July 2000 crash, the slump in air travel following the 9\ 11 attacks and rising maintenance costs.
So Why the Concorde was called as a Supersonic JET? Answer ….. here
Subsonic: M < 1
Sonic: M=1
Transonic: 0.8 < M < 1.2
Supersonic: 1.2 < M < 5
Hypersonic: M > 5

And last thing which are the Fastest aircrafts in the world ??
Plane Top Speed
X-43 (Unmanned) Mach 9.8 ( around 12000 Km/h J will take me 3 minutes to reach NPG from PUNE yeeipeeee but unfortunately it is
unmanned)
X-15 Mach 6.72 (The X-15 is the fastest manned aircraft in the world.)
SR-71 Blackbird (YF-12) Mach 3.2+ (The SR-71 Blackbird is the fastest airplane in the world. )



BTW DO you now Aircraft and airplane are not the same thing?? :O:O
We often tend to use the terms airplane and aircraft synonymously , but NO they are different.
Aircraft as any craft that flies through the air so it will include - an airplane, helicopter, missile, glider, balloon, blimp or any other vehicle that uses the air to generate lift for flight
Airplane is a powered vehicle that relies on fixed wings to generate lift.

So you can we say our good old KITE is an aircraft??? :):):)

Enough Gyan for the day….let’s get back to work……………. :P

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