Mechanical Engineer's


Power Scenario of the World – Fuel for Power Plants

Experts often seem to be doomsayers when they keep warning us to control our energy demand so that the supply does not mismatch with the demand. We think that there are several power plants across the globe and this power stuff is without much ado. Of course human beings are skeptical by nature and are not convinced easily about anything unless backed by facts. This is a good characteristic in a way as it is in tune with the concepts of science which does not believe in anything unless backed by substantial facts. So I am not trying to act another doomsayer but just trying to throw some light on the darker aspects of power scenario of the world – the way it is growing vis-à-vis depleting natural sources of power.

The Energy ScenarioThe good news is that the world is developing very fast and literally every nook and corner of the globe is experiencing this growth. Although some experts would certainly disagree and point towards several places which are still underdeveloped due to several reasons but the financial analysis is not the theme of this article.

The bad news (I would call it not so good news) is that energy consumption is also rising. In the year 2007 the overall energy consumption of the world grew by nearly two and half percent. This may not seem a very high percentage but then keep in mind that it is a percentage and the absolute values are really huge. The paradox about this growth of consumption is that the developed world is actually reducing overall consumption while the fast developing economies such as China and India are the major players in this growth ballgame. To give you an idea in the same year (2007) the consumption of European Union declined by 2.2% while in China it grew by 7.7% thus nullifying the advantages of EU decline.

Where does it come from?I am not against development or people enjoying more comforts and spending more energy but the million dollar question (you can also call it the million barrel question) is the source of this energy. Power plants – you will say, yes but power plants do not run on air (I mean wind power plants do, but their current contribution is quite small) and certainly need a source of power. We have been reading about various sources of power such as nuclear, hydro and oil. Out of these oil reserves are a cause for concern as whatever the amount is left in stock, it is still a non-renewable source. Take a look at the graph in figure 1 which shows the amount of oil reserves in different parts of the globe in the year 2007. It shows the latest proven reserves in thousand million barrels. Also take a look at this site which is not very recent but should give you a rough idea about the oil consumption per day. So just calculate for how many years these reserves will last.

In the end we can say that though there are several alternatives available to mankind even if oil reserves run out, still it is always best to be conservative about a precious resource. Every one of us should consider as his/her duty to conserver energy and contribute in our own small way to the energy saving campaign.

Harley Davidson- A Goliath among David’s.

What started as a whim and then developed into burning ambition for two young people, has given the world one of its most state-of-the-art two-wheeler today. William Harley and Arthur Davidson would hardly have envisaged what success lay for their invention in future. Though their first attempt had fallen flat in conquering even the modest slope of Milwaukee hills, they persisted, and finally after tentative brushes with bigger engine and loop-frame design, they assembled something which turned out to be a mania on the roads. By 1920, Harley Davidson was the largest selling motorcycle in the world, its sale repertoire spanning to 67 countries. It also managed to win its first race with the engine propelling the bike to over a hundred km. per hour. By 1929 the company had come up with the Flathead V-twin.

From the days of Flathead V twin, the Harley Davidson has dawned in many avatars and today it gives you a behemoth of choices, each dazzling in armory, brilliant in view. This mean machine comes in four main types, Cruiser, Sport, Standard and Touring. Various models like Mainstream Chopper Shootout, Master Restorer Bob Davis, Harley-Davidson FLSTSB Cross Bones Review, Screamin Eagle V Rod Upgrade, and Harley-Davidson FLSTSB Softail Cross Boneshave have caught the rage of the market like forest fire. The Davidsons are a master in the field of customization; such prioritizing has led them to great end-products like Chopper.

In its batch of 2009 models, Harley’s are introducing the Sportster, Dyna, Softail and VRSC fresh editions. They are hugely customized and concentrate fully on any kind of subtle or weird requirements that a buyer might have. Revved-up models of Fatboy and Night Train have already taken the attention of buyer’s having penchant towards the Softail version. Dyna has thrown in great models like Super Glide, Street Bob and Low Rider. Sportster is not one to fall behind either, with Nightster and other latest Sportster sub-brand innovations; it again breezes into the buyer’s perspective in a big way.

Many such inventions have not only come up with the most innovative accessory or frames, they have also given the already plush machine a decisive edge when it comes to handling it. For its weight, engine and performance it could well have been a dubious machine to handle but it is way too streamlined for its size, the experts seeing to this economy in a much focused way.

Many advantages come out of buying these bikes. Primarily, these bikes have a high resale value. Further they give great leverage in increasing public relations, it’s so overawing in structure that one already gets a big fillip sitting on it. Policemen since last century can unanimously vouch for this. Its accessory is customized, thus throwing plenty of options suiting individual comforts.

Harley is a bike that comes with a heavy price tag so sometimes one has to settle for a second-hand used version, one that can be made available at a lesser price.

Harley Davidson, not for nothing is the dream for some, passion and rage for others and reason to live for still many others across the stratum of upper-class society.

524 Chevy Small Block Engine - Horsepower!

With a CNC machine you can make any size engine you want.

524ci Small-Block Chevy, 1,083 HP At 7,800 RPM
Sonny's Racing Engines, Lynchburg, VA
Not long ago, Bill "Grumpy" Jenkins made history building race engines out of cast-iron production blocks and heads because race-specific parts didn't exist. Today, with five-axis CNC machines spitting out designer cylinder blocks and heads, if you can imagine it there's somebody willing to build it. To that end, Sonny's Racing Engines built this wazoo 524ci small-block Chevy using the latest GM RO7-style NASCAR cylinder heads. Not only do these heads flow hurricane-like numbers, but they are based on a wider bore spacing than the production small-block Chevy's spec of 4.400 inches. The RO7 heads are designed for a 4.500-inch bore spacing, which means they won't fit on a typical Gen I-style cylinder block. This created a demand for a CN Enterprises custom billet block to match the heads, complete with water jackets, so this motor could be used in wild Southern-style match-race drag-racing applications. Just for the record, that four-digit horsepower figure is the normally aspirated power. At 1,083 hp, it computes to just over 2 hp/ci. The SpeedTech nitrous system isn't just for show, but they've not yet tried the squeeze. We are duly impressed.

'At 1,083 hp, this small-block is making 135 hp per cylinder! There are some four-cylinder production engines that don't make that much power from all four holes.

1.Nascar Stuff
The RO7 heads were originally developed for GM NASCAR applications and began appearing in competition at the end of the '07 season. This new RO7 engine is a complete clean-sheet-of-paper design that has basically nothing in common with any previous production engine. The bore spacing is wider, the distributor is located in the front of the engine like a Ford to eliminate cam-twist effects on ignition, and the cam has been raised in the block to allow shorter pushrods. This should make the GM engines more competitive than ever. Current NASCAR unrestricted power numbers are in the 850hp range . . . and climbing.

2.Block Party
It's rare that we put the spotlight on a cylinder block, but a foundation that is fully CNC-machined out of one large chunk of aluminum is newsworthy. CN Enterprises is the company responsible for creating a very large pile of aluminum chips. The block employs a Rat-sized 4.280-inch bore, along with 400 main-bore diameters, a 2.360-inch cam-journal diameter, and a monstrous 4.55-inch long-arm stroke. The stock deck height on a small-block Chevy is 9.025 inches, but this block is built on a 31/44-plus-inch taller 9.855 deck.