Some research/thoughts on power terminology : Horse Power and CC Cubic Centimeters – @AgreeToDisagree – 14th Januaery 2012

In clean energy, Elephant on January 14, 2012 at 10:57 am

WTF is a cc of power? WTF is a HP (horsepower)?

On a smaller engine, typically used on lawn mowers and snow blowers, rough estimate is 34.5cc = 1 hp. A one liter bottle of water has a volume of 1000 cc.

Example 342CC engine on a snowblower would approximately equate to a 10hp engine.

CCs are engine size. Horsepower is [I]power[/I]. You can get a rough estimate of the power by multiplying the engine’s size in cc by about 8 tenths of it’s redline, dividing that by 56,634, then dividing that by 1.3. Considering that motorcycle engines of that size are normally put in cruisers, which often have a redline between 5 and 6,000 rpm, I estimate (with no guarantee) a horsepower rating between 97 and 117hp. Anonymous

How to Convert CC to Horsepower

Horsepower (hp) is a measure of power output, and cubic centimeters (cc) is a measure of volume (size), so there is no formula for the direct conversion of cc to horsepower. Some very efficient small engines can produce almost 1 horsepower per cc of volume, and some huge diesel ship engines produce only 1 hp for every 234 cc of volume.

Almost all non-racing automobile engines have a cc to hp ratio in a range of 13 to 25:1 (i.e. some engines can produce 100 hp at just 1300 cc, but others require up to 2500 cc to produce the same 100 hp). The Simetric website (see Resources) offers a chart with an extensive listing of cc to hp ratios of various types of engines.

Engine Efficiency vs. Size

Determine the horsepower of the engine. Since horsepower and cc are different units of measure, the only way to accurately convert cc to hp is to determine the horsepower output of the specific engine in question first. The hp output of an engine is available from many sources, including the spec sheet in the owner’s manual, auto parts store or dealership and online. (Or, given that power output degrades over time and varies based on the engine tuning, it can be determined by empirical testing at an engine workshop and/or race track.)
Calculate the cc to hp ratio. When you have determined the horsepower of the engine, divide that number by the number of cc in the engine, giving you the cc to hp ratio. For example, if the hp rating of a 3000 cc engine is 200, then the cc to hp ratio is 3000/200 = 15.

Highly efficient engines, such as those in Formula One race cars or top fuel dragsters, can have cc to hp ratios as small as 1.05 to 1 or even less. That is, the engine is producing almost 1 hp of power output for every cc of engine size. Engines like this are supercharged and incredibly highly tuned, and all run on the most volatile fuels. Larger, less efficient engines, like those found on capital ships, might produce 1 hp for every 200 cc of engine size or more. These engines have a very long stroke and are intentionally designed for a low power but high torque output.

Tips & Warnings

Horsepower is a non-metric unit of power that is almost only used in reference to internal combustion engines. Other more typical units of power used in scientific discourse include kilowatts

(1 hp = .75kW) and foot pounds per second (1 hp = 550 ft-lb/sec).

Units of horsepower (HP) measure power output, while cubic centimeter (CC) units measure volume. Since each is used to measure different things, there is no easy calculator for direct conversion,

but there is a formula that you can use to convert CC to HP. As a general rule related to vehicle engines, 15 CC = 1 HP. So a 1500 CC engine is roughly equivalent to a 100 HP engine.

[[[ *** RESPONSE *** ]]]

Look at all the illogical nonsense terms above! Misleading and mismatched use of the word ‘horse’ and what a ‘horse’ can actually produce in power (horsepower) – much like fiat currency inflation if anything. Locally a Pawpaw (Papaya) costs 1 cent in the pre 50s era. Now it costs $3.00 or more. 300 times?!? That is why some of us are not interested in economics and have awareness of inequitable wealth distribution . . .

One horse (a REAL HORSE) could pull most of today’s smallest cars at a reasonable speed. Does this mean that 100 horsepower is only 1 REAL HORSE’s actual power? What does the industry term *mean* 100 horses? 10 REAL HORSES could pull 1 lorry. Shouldn’t a standard draft horse’s limit of 700lbs be 1 HP proper? See below :

The two-horse rule : “The concept of teamwork can be illustrated by the two-horse rule. If one horse can pull 700 pounds and another horse can pull 800 pounds, how much weight will they pull yoked together? The answer may surprise you. The two-horse team will pull their own weight plus the weight of their interaction. Therefore, yoked together, the horses can pull 3000 pounds!”

At one horse : we get 700 pounds pullable / 2 horses we get 3000 pounds pullable

So take for example :

The 660cc Kancil at 623 kg (1,373 lb) : the HP listed for a Kancil is 49 hp (37 kW) – How about we just say *1.5 HP* (instead of 49 HP) as only 1.5 horses are needed to pull this vehicle?

Then take for example the 3200cc S300 Mercedes 221 at 2304 kg (5 079.45) : the HP listed for a S300 Mercedes 221 is 204 hp (152 kW) – How about we just say *3 HP* (instead of 204 HP) as only 3 horses are needed to pull this vehicle?

Finally why do cars need to be made of heavy metal/steel when roads don’t even allow vehicles to travel at any reasonable speed enough to crack or dent wooden frames? Use bamboo or wood instead, almost as tough considering added flexibility.

Whats with the CC efficiency nonsense? Also we can eat horsemeat of retired horses than waste energy and time with recycling and pollute from rust and paint.

Then consider the below article :

Pavegen: Energy Generating Pavement Hits the Streets
by Diane Pham, 10/28/09

Any one point on a busy street can receive up to 50,000 steps a day, so imagine if you could take all that foot traffic and turn it into something useful – like energy! A new product designed by Laurence Kemball-Cook, the director of Pavegen Systems Ltd., can do just that. With a minuscule flex of 5mm, the energy generating pavement is able to absorb the kinetic energy produced by every footstep, creating 2.1 watts of electricity per hour.

Every time a rubber Pavegen stone is stepped on it bends, producing kinetic energy that is either stored within lithium polymer batteries or distributed to nearby lights, information displays, and much more. Just five slabs spread over a lively sidewalk has the ability to generate enough energy to illuminate a bus stop throughout the night. But applications are not limited to the street. Extended into other public and private spaces the system has the potential to power lights, computers, automatic doors, ticket machines, refrigerators, shop signs, microwaves… Depending on the usage, the payback period could be as little as one year, and each Pavegen stone has an estimated system life of five years of use, or 20 million steps.

Constructed from marine grade stainless steel and recycled materials, the surface (which comes in a variety of choice colors) of each slab features the rubber from old tires, and the internal components are made from recycled aluminium. Whenever a slab is stepped on it emits a glow (which only uses 5% of the total energy produced) – this not only informs the passerby of their contribution, but also reinforces a sustainable attitude and an increased awareness of the energy that is continually created and expended by each individual.

So far Pavegen has been tested out in East London and will continue onto various destinations in the UK in 2010. If all goes well it will hopefully be jetting off to some of the most trafficked and amazing places all over the world like New York’s Times Square, the Eiffel Tower or even Disney World.

+ Pavegen Systems Ltd.

WHAT IF we got somewhat heavily loaded horses and trotted them up and down along such a pathway in a ramp form multistorey building to produce kinetic energy to power the world? What kind of CLEAN 100% green power could be produced? That life of 5 years of use thing could be improved easily to 50 if nanomaterials are used. So think you scientists, horses, then even elephants (try a pachyderm sized hamster wheel) and after genetic science – dinosaurs . . .

"Elephant Wheel Power", think Hamster wheel at Elephantine size, crossed with same mechanisms used in Hydro-power, except the driving force is a number of elephants on shifts . . . overall cost of pollution, and building of dams is far much higher. This is an organic source of power that is infinitely renewable, just keep the work animals well rested and happy . . .

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