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Showing posts from June, 2014

PSLV C23 successfully launched

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PSLV C23 successfully launched PSLV-C23 carrying French Earth Observation Satellite SPOT-7 and four co-passenger spacecraft was successfully launched from the Satish Dhawan Space Centre at Sriharikota. SPOT 7 is an Earth observing satellite, similar to Indian Remote Satellite System (IRSS). ISRO has so far launched 35 satellites of foreign countries onboard its workhorse Polar Satellite Launch Vehicle. Prime Minister Narendra Modi   witnessed the launch of the satellite and it may be noted that Modi's presence signifies India's commitment to space and other related missile technologies as top priority for the country. Congrats ISRO and team !

Dodge Tomahawk, 350 miles per hour

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Dodge Tomahawk, 350 miles per hour World’s fastest bike ever produce, acquire a top speed of 350 miles per hour. The bike features a Viper V-10 based engine with power of 500 HP. It reaches 0 to 60 mile in just 1.5 seconds. Unlike other motorcycles Dodge Tomahawk have four wheels, introduce in North American International Auto Show in 2003. Key Features 10 cylinder viper V-10 engine with power of 350 HP. Top speed of 350 miles per hour, reaches 0 to 60 miles in 1.5 seconds. Two manual speed transmission. Only 9 units produced all over the world.

Ackerman Steering

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Ackerman - what it is, what it does and why we care.     A short history:  In the early days of automobiles, no one could make a (4) wheel car steer correctly. Cars were often driven on wooden floors in the early days (demonstration purposes only- they were not yet practical anyway) and the versions with 4 tires were always leaving rubber marks behind. Tire life was terrible and the cars would often buck as they were turned; this is why there were so many three wheeled cars initially. The problem was known- as a car is driven in a circle, the inboard front tire (assuming it is front wheel steering) must make a smaller turning radius than the outside front tire. This is evident from tire tracks after a snowfall, a car turning in a circle will leave two distinct circles, one smaller than the other. This was not an easy problem to fix because each tire will be the inside the circle at some time and as the turning radius is changed, so too must this differential c...

Rack-and-pinion Steering

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Rack-and-pinion Steering Rack-and-pinion Steering Rack-and-pinion steering is quickly becoming the most common type of steering on cars, small trucks and SUVs. It is actually a pretty simple mechanism. A rack-and-pinion gearset is enclosed in a metal tube, with each end of the rack protruding from the tube. A rod, called a tie rod , connects to each end of the rack. The pinion gear is attached to the steering shaft . When you turn the steering wheel, the gear spins, moving the rack. The tie rod at each end of the rack connects to the steering arm on the spindle (see diagram above). The rack-and-pinion gearset does two things: It converts the rotational motion of the steering wheel into the linear motion needed to turn the wheels. It provides a gear reduction, making it easier to turn the wheels. On most cars, it takes three to four complete revolutions of the steering wheel to make the wheels turn from lock to lock (from fa...

How Hydraulic Brakes Work

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How Hydraulic Brakes Work   Hydraulic brakes have transformed mountain bike disciplines ever since their arrival. They enable us to go faster and stop harder. So what is it about hydraulic brakes which make them the stoppers of choice for professionals and trail riders alike? First a little bit about hydraulics.. Hydraulics The principle behind any hydraulic system is simple: forces that are applied at one point are transmitted to another point by means of an incompressible fluid. In brakes we call this brake fluid of which there are a few different varieties, but more on that later. As is common in hydraulics the initial force which is applied to operate the system is multiplied in the process. The amount of multiplication can be found by comparing the sizes of the pistons at either end. In braking systems for example, the piston driving the fluid is smaller than the pistons operating the brake pads therefore the force is multi...

Cell phones then and now

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Turbulence Go-Kart

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                             TURBULENCE GO-KART Suggestions and Calculative part is needed for us. Who have idea on these are invited in comments — STEERING SYSTEM — 100% Rack and Pinion Steering     For Rack and Pinion Steering,      the general equation is,      (1/tan θ o)-(1/tan θ i )= (B/L)      B (track width)=      L (Base)=    BRAKING SYSTEM Total weight of vehicle under static condition(m)= Wheel base length(l)= Distance of CG from front axle= Distance of CG from rear axle= Force on the front wheel= Force on the rear wheel= Weight distribution is        in favour of front wheel Selection of Brake:   Suggestions and Calculative part is needed...