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Trigonometry ... Laws & Identities......
Monday, 26 May 2014
Wednesday, 14 May 2014
Saturday, 10 May 2014
03:13
Unknown
Worm drive:-
A worm drive is a gear arrangement in which a worm (which is a gear in the form of a screw) meshes with a worm gear (which is similar in appearance to a spur gear, and is also called a worm wheel). The terminology is often confused by imprecise use of the term worm gear to refer to the worm, the worm gear, or the worm drive as a unit.
Like other gear arrangements, a worm drive can...
03:11
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ACTIVE MAGNETIC BEARING :-Active magnetic bearing is a bearing which supports a load using magnetic levitation.Magnetic bearings support moving machinery without physical contact, for example,they can levitate a rotating shaft and permit relative motion without friction or wear. In active magnetic bearings (AMB) a stable equilibrium is achieved by means of one or more control loops.The use of...
03:07
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Rack and Pinion steering system
The Rack and Pinion steering system is the most common system found mostly in modern vehicles. It employs a simple mechanism. The parts of this system are steering column, pinion gear, rack gear, tie rods, kingpin. The circular motion of the steering wheel is transmitted to the pinion gear through the steering column and universal joint. The pinion is meshed with...
03:04
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A compound gear is a number of gears fixed together. Consequently, they rotate at the same speed. An example can be seen below.The gears that make up a compound gear usually differ in size and have a different number of teeth. This is useful if there is a need to speed up or slow down the final outpu...
03:03
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The Most Powerful Diesel Engine in the World!ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــThe Wartsila-Sulzer RTA96-C turbocharged two-stroke diesel engine is the most powerful and most efficient prime-mover in the world today. The Aioi Works of Japan's Diesel United, Ltd built the first engines and is where some of these pictures were taken. It is available in 6...
03:02
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Thermoelectrically operated fan using a candle.( Operate a fan with the candle during power cuts/ villages where there is no power!!) Innovation at its best.A peltier or tec module is placed between two heatsinks. The lower Bieng the hot side heared by the candle. And the upper bieng cooled by the cpu cooling tower. The heat diffrence between the two surfaces generate electricity (about 5v dependant...
02:59
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BHP vs PSThere are a number of ways to measure the power that can be generated by a mechanical device like a car. The most popular is brake horsepower or BHP, which is a method of measurement for vehicles without the encumbrance added by connecting devices like the gearbox and transmission system. In comparison, PS is a unit of power in German. Although PS is very popular in Germany and in...
02:58
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CLASSIFICATION OF VEHICLES BY DRIVE METHOD:
Vehicles can be classified by the position of the engine and drive wheels, and the number of drive wheels:-1)FF (Front-engine, Front-drive)Because a FF vehicle does not have a propeller shaft, a spacious interior can be realized, thus achieving excellent comfort.2) FR (Front-engine, Rear-drive)Because a FR vehicle has a good weight balance, it excels...
02:57
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A serpentine belt, also known as a multi-vee, poly-v, or multi-rib belt, is a single, continuous belt used to drive multiple peripheral devices in an automotive engine, such as an alternator, power steering pump, water pump, air conditioning compressor, air pump, etc. The belt may also be guided by an idler pulley and/or a belt tensioner (which may be spring-loaded, hydraulic, or manual). The production...
02:55
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With this system, the turbine on the intake side has movable guide vanes that change position to provide optimum flow conditions and a high turbine efficiency rating, throughout the engine speed range. This permits high boost pressure from low engine speeds, and thus a flatter torque curve and higher power output. The movable guide vanes are controlled by the engine management system, adjusting...
02:53
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An ignition magneto is a magneto that provides current for the ignition system of a spark-ignition engine, such as a petrol engine. It produces pulses of high voltage for the spark plugs.The use of ignition magnetos is now confined mainly to engines where there is no other available electrical supply, for example in lawnmowers and chainsaws. It is also widely used in aviation piston engines even...
02:52
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An overhead (OHV) engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block (usually beside and slightly above the crankshaft in a straight engine or directly above the crankshaft in the V of a V engine), and uses pushrods or rods to actuate rocker arms above the cylinder head to actuate the valves. Lifters or...
02:50
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EXlink (Extended Expansion Linkage Engine) :With the goal of taking energy efficiency to a new level, Honda developed its own linkage engine design based on Atkinson’s extended-expansion cycle engine, invented some 130 years ago. The first small engine of its type to be commercially produced, the revolutionary EXlink has an expansion stroke longer than its compression stroke to realize an expansion...
02:42
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A non-circular gear (NCG) is a special gear design with special characteristics and purpose. While a regular gear is optimized to transmit torque to another engaged member with minimum noise and wear and with maximum efficiency, a non-circular gear's main objective might be ratio variations, axle displacement oscillations and more. Common applications include textile machines, potentiometers, CVTs...
02:41
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The Pentroof hemi engine. HEMI Pros and Cons:There are many different parts of an engine's design that control the amount of power you can extract from each combustion stroke.For example:You want to burn all of the gas in the cylinder. If the design leaves any of the gas unburned, it is untapped energy.You want the maximum cylinder pressure to occur when the crankshaft is at the right angle,...
02:36
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POWER HACKSAW-Power hacksaws are used to cut large sizes (sections) of metals such as steel. Cutting diameters of more than 10/15mm is very hard work with a normal hand held hacksaw. Therefore power hacksaws have been developed to carry out the difficult and time consuming work. The heavy ‘arm’ moves backwards and forwards, cutting on the backwards stroke. The metal to be cut is held in a machine...
02:35
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Spur Gears:-Spur gears are the most common type of gears. They have straight teeth, and are mounted on parallel shafts. Sometimes, many spur gears are used at once to create very large gear reductions.Spur gears are used in many devices that you can see all over like the electric screwdriver, dancing monster, oscillating sprinkler, windup alarm clock, washing machine and clothes dryer. But you won't...
02:29
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This is a "Duke engine".The Duke Engine is an Advanced Internal Combustion Enginedelivering high Thermodynamic Efficiency, complete Fuel Flexibility, (runs on any suitable spark ignition fuel), Neglible 1st and 2nd order Vibration with huge Weight and Size savings.It is a considerably less complex internal combustion engine and is suitable for Marine (inboard and outboard), Light Aircraft, Generator/Utility...
02:27
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Cochran boiler:-Cochran boiler consists of a cylindrical shell with a dome shaped top where the space provided for steam. Its crown has a hemispherical shape and thus provides maximum volume of space. Its furnace is seamless; below it there is a grate and ash pit. It has a combustion chamber and smoke box, which are connected through fire tubes. Smoke box is connected to chimney. Various mountings...
02:24
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The shaper machine:-Is a type of machine tool that uses linear relative motion between the workpiece and a single-point cutting tool to machine a linear toolpath. Its cut is analogous to that of a lathe, except that it is (archetypally) linear instead of helical. (Adding axes of motion can yield helical toolpaths, as also done in helical planing.) A shaper is analogous to a planer, but smaller,...
02:23
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One wheel is all you really need? How would you like to spend your hours in traffic caged inside a giant wheel? Maybe this is why these vehicles never caught on as serious transportation, but the bizarre concept of the monowheel has captivated engineers for almost a century and a ha...
02:22
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WELDING ROBOTRobot welding is the use of mechanized programmable tools (robots), which completely automate a welding process by both performing the weld and handling the part. Processes such as gas metal arc welding, while often automated, are not necessarily equivalent to robot welding, since a human operator sometimes prepares the materials to be welded. Robot welding is commonly used for resistance...
02:22
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Epicyclic gear or planetary gear is a gear system consisting of one or more outer gears, or planet gears, revolving about a central, or sun gear. Typically, the planet gears are mounted on a movable arm or carrier which itself may rotate relative to the sun gear. It is used in automatic transmission...
02:18
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Bending momentA bending moment is a measure of the average internal stress induced in a structural element when an external force or moment is applied to the element causing the element to bend.The internal stresses in a cross-section of a structural element can be resolved into a resultant force and a resultant couple. For equilibrium, the moment created by external forces (and external moments)...
02:16
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WANKEL ENGINEThe Wankel engine is a type of internal combustion engine using an eccentric rotary design to convert pressure into a rotating motion instead of using reciprocating pistons. Its four-stroke cycle takes place in a space between the inside of an oval-like epitrochoid-shaped housing and a rotor that is similar in shape to a Reuleaux triangle but with sides that are somewhat flatter. The...
02:16
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An internal-combustion engine consisting of an air compressor, combustion chamber, and turbine wheel that is turned by the expanding products of combustion. The four major types of gas turbine engines are the turboprop, turbojet, turbofan, and turboshaft. Gas turbine - turbine that converts the chemical energy of a liquid fuel into mechanical energy by internal combustion; gaseous products of the...
02:15
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THE SCIENCE BEHIND TEMPLE BELLSMost of the old temples have large bell at the entrance of the temple and you need to ring it before you enter temple. A Temple bell have a scientific phenomena; it is not just your ordinary metal. It is made of various metals including cadmium, lead, copper, zinc, nickel, chromium and manganese. The proportion at which each one of them mixed is real science behind a...
02:14
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Ball screw or Recirculating Ball screw-A ball screw is a mechanical linear actuator that translates rotational motion to linear motion with little friction. A threaded shaft provides a helical raceway for ball bearings which act as a precision screw. As well as being able to apply or withstand high thrust loads, they can do so with minimum internal friction.The ball assembly acts as the nut while...
02:13
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CamshaftCamshaft is used in IC engine to control the opening and closing of valves at proper timing. For proper engine output inlet valve should open at the end of exhaust stroke and closed at the end of intake stroke. So to regulate its timing, a cam is use which is oval in shape and it exerts a pressure on the valve to open and release to close. It is drive by the timing belt which drives by...
02:13
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Electron Beam Machining (EBM):-It uses a focused beam of high-velocity electrons to remove material. In this process, a stream of electrons strikes an object and causes rapid melting and vaporization of the material. For drilling applications, a backing material is used on the rear side of the workpiece. When the beam penetrates through the workpiece and contacts the backing material, the high vapor...
02:12
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UNDERWATER WELDING-Many of us won't have heard of underwater welding, but it's actually a very important thing in many industries. Underwater welding includes a lot of different processes that join steel on offshore oil platforms, pipelines, ships, and in many other applications.It can be done at regular or at high pressures, and can be done in a wet environment or a dry one. Let's take a look at...
02:10
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Plasma cutting:Plasma cutting is a process that is used to cut steel and other metals of different thicknesses (or sometimes other materials) using a plasma torch . In this process, an inert gas (in some units, compressed air) is blown at high speed out of a nozzle; at the same time an electrical arc is formed through that gas from the nozzle to the surface being cut, turning some of that gas...
02:09
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Material FatigueIn materials science,fatigue is the weakening of a material caused by repeatedly applied loads. It is the progressive and localized structural damage that occurs when a material is subjected to cyclic loading.Fatigue occurs when a material is subjected to repeated loading and unloading. If the loads are above a certain threshold,microscopic cracks will begin to form at the...
02:08
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AIR BAG:-An airbag is a vehicle safety device. It is an occupant restraint system consisting of a flexible fabric envelope or cushion designed to inflate rapidly during an automobile collision.The design is conceptually simple; a central Airbag control unit (ACU) (a specific type of ECU) monitors a number of related sensors within the vehicle, including accelerometers, impact sensors, side (door)...
02:07
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The Parts of an Airplane:-An airplane, aeroplane or simply plane, is a powered fixed-wing aircraft that is propelled forward by thrust from a jet engine or propeller. Airplanes come in a variety of sizes, shapes, and wing configurations. The broad spectrum of uses for airplanes includes recreation, transportation of goods and people, military, and research.Most airplanes are flown by a pilot on...
02:05
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QUS. :- WHY THE TYRES OF THE AUTOMOBILES ARE ALWAYS
BLACK IN COLOUR ?
ANS:- It is our common experience that we find the tyres of
cycles, cars, bikes and other heavy vehicles are black(dark) in colour.The tyres of the above vehicles should possess certain important qualities.Basically all the tyres are made from rubber.But while making tyres the manufacturers will mix certain other substances...
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