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	NationMaster - Encyclopedia: Specific fuel consumption
		Specific fuel consumption, often shortened to SFC, is an engineering term that is used to describe the fuel efficiency of an engine design w/ a mechanical output.
		SFC is dependent on engine design, but differences in the SFC between different engines using the same underlying technology tend to be quite small.
		Specific fuel consumption, often shortened to SFC, is an engineering term that is used to describe the fuel efficiency of an engine design.
	www.nationmaster.com /encyclopedia/Specific-fuel-consumption (1462 words)

	Specific fuel consumption - Wikipedia, the free encyclopedia
		Specific fuel consumption, often shortened to SFC, is an engineering term that is used to describe the fuel efficiency of an engine design.
		SFC is dependent on the engine design, with differences in the SFC between different engines tending to be quite small.
		One exception to the rule is that the SFC within a particular class of engine will vary based on the compression ratio, an engine with a higher compression ratio will deliver a better SFC because it extracts more power from the fuel.
	en.wikipedia.org /wiki/Specific_fuel_consumption (186 words)

	Specific Fuel Consumption
		But the amount of fuel used to generate that thrust is sometimes more important, because the airplane has to lift and carry the fuel throughout the flight.
		The fuel consumption of TSFC is "how much fuel the engine burns each hour." The specific of TSFC is a scientific term meaning "divided by mass or weight." In this case, specific means "per pound (Newton) of thrust." The thrust of TSFC is included to indicate that we are talking about gas turbine engines.
		Mathematically, TSFC is a ratio of the engine fuel mass flow rate mdot f to the amount of thrust F produced by burning the fuel:
	www.grc.nasa.gov /WWW/K-12/airplane/sfc.html (734 words)

	Fuel and Air Flow Analaysis
		Power is made by air and fuel in the sufficient quantity and ratio.
		Fuel burn efficiency is quantified by "brake specific fuel consumption" (BSFC).
		The fuel ratio is determined by: fuel pressure (relative to manifold pressure), injector size, and injector pulse width.
	www.merkurencyclopedia.com /Fuel/fuelanal.html (496 words)

	Brake specific fuel consumption - Wikipedia, the free encyclopedia
		It is the rate of fuel consumption divided by the rate of power production.
		BSFC is specific for the piston engine known as the reciprocating engine.
		The general term is Specific fuel consumption (SFC).
	en.wikipedia.org /wiki/Brake_specific_fuel_consumption (336 words)

	Specific Fuel Consumption (Site not responding. Last check: 2007-11-07)
		The fuel consumption of TSFC is "how much fuel the engine burns each hour." The specific of TSFC is a scientific term meaning "divided by mass or weight." In this case, specific means "per pound (Newton) of thrust." The thrust of TSFC is included to indicate that we are talking about gas turbine engines.
		Gathering all the terms together, TSFC is the mass of fuel burned by an engine in one hour divided by the thrust that the engine produces.
		Engineers use the TSFC for a given engine to figure out how much fuel is required for an aircraft to perform a given mission.
	www.lerc.nasa.gov /WWW/K-12/cdtemp/airplane/sfc.html (681 words)

	Specific fuel consumption: Definition and Links by Encyclopedian.com - All about Specific fuel consumption
		Specific fuel consumption, often shortened to SFC, is an engineering term that is used to describe the fuel effeciency of an engine design.
		It measures the amount of fuel needed to provide one horsepower for a period of one hour, typically in pounds of fuel burned.
		Diesel engines have better SFCs than gasoline largely because they have much higher compression ratios, the way they burn their fuel is actually less effecient.
	www.encyclopedian.com /sp/Specific-fuel-consumption.html (259 words)

	ADV - German Airports Association
		It is true that capacity must always be kept up to meet increasing demands, but nevertheless specific energy consumption has been declining for years at many airports and airfields, thanks to the modernisation of the central electricity supply, of the airports' heating and air-conditioning systems, and of the vehicles used at airports.
		As the specific fuel consumption of air traffic is intended to be halved again in the foreseeable future, the gap between the two modes of transport will narrow even further.
		The total consumption depends on the specific fuel consumption of the transport mode concerned and the actual distances travelled in getting from A to B. The above-mentioned analysis carried out by Prognos on domestic transport networks revealed that most indirect routes encountered are on rail journeys, the least on journeys by air.
	www.adv-net.org /eng/gfx/634.php (1354 words)

	Fuel Consumption - Navarro / Saraiva / D'Elboux
		The accuracy of fuel consumption computations is only as good as the accuracy of the available specific fuel consumption map (engine loading, power and engine revolutions); it is, therefore, essential that a representative diagram for the engine is used for the calculations.
		For the determination of the consumption with driving schedule, it is divided according to the kind of movement, that is, idle vehicle with disengaged engine, vehicle accelerating, vehicle in constant velocity, vehicle shift gear and vehicle decelerating with the engine engaged.
		In this second approach, the consumption for the vehicle to decelerate from vi to vf is Bm[l/km]=(B(vi)+B(vf)) /2, where B(vi) and B(vf) are the consumption of the engine working without load in the rotations determined by vi and vf and, also, for the engaged gear.
	www.geocities.com /SunsetStrip/4060/consumo.html (2450 words)

	Fuel Injection - Turbo Motorcycles, Hot Rods Bikes,Turbo Bikes,Suzuki,
		The fuel injector employs an electric solenoid which is triggered by the ECU for en opening duration of 1.5 to 16 milliseconds (Ms).
		Fuel not used by the engine must be returned to the gas tank preferably above the fluid level in the tank which keeps the 'fuel-head pressure' from influencing injector rail pressure.
		The purpose of the fuel pressure regulator is to maintain a constant supply of fuel to the fuel injectors.
	www.turborick.com /fidoc.html (4323 words)

	9 Airline reporting on fuel consumption, Danish Environmental Protection Agency
		The data for the fuel consumption per ASK and per RPK for each aircraft type refers to the usage cycle for a specific airline, or a number of airlines, in a specific year, including the specific load factor and the average stage distance flown by type of aircraft in that year.
		The fuel consumption figures for scheduled airlines can be more realistically compared to charter carriers if using estimates for the fuel consumption where the fuel use attributable to lifting and carrying freight is subtracted, because charter carriers generally transport negligible amounts of freight.
		Not surprisingly, the most extreme difference in the estimate for the specific fuel consumption per revenue passenger kilometre appears between the methodology where all the fuel is attributed to passenger transport and the methodology where the fuel is distributed evenly between passengers and freight on an equal weight basis.
	www.mst.dk /udgiv/publications/2003/87-7972-489-2/html/kap09_eng.htm (5365 words)

	Specific fuel consumption -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-07)
		Specific fuel consumption, often shortened to SFC, is an (The discipline dealing with the art or science of applying scientific knowledge to practical problems) engineering term that is used to describe the fuel efficiency of an (Motor that converts thermal energy to mechanical work) engine design.
		It measures the amount of (A substance that can be consumed to produce energy) fuel needed to provide a given power for a given period.
		One exception to the rule is that the SFC within a particular class of engine will vary based on the (Click link for more info and facts about compression ratio) compression ratio, an engine with a higher compression ratio will deliver a better SFC because it extracts more power from the fuel.
	www.absoluteastronomy.com /encyclopedia/S/Sp/Specific_fuel_consumption.htm (407 words)

	Alban Diesel Dynamometer Tests of GTA Additive in a Caterpillar Engine of a Kenworth Diesel Truck - showing fuel ...
		Tests of the GTA fuel additive in diesel fuel were made at concentrations (units are parts per million by mass (ppm)) of 0, 2.6, 7.8, 20.8, 41.6 and again at an estimated 2.6.
		The last concentration was calculated using a fuel filter capacity of an estimated one gallon, and assuming that it held fuel at a concentration of 41.6 ppm from the previous test.
		Since the fuel is used to cool the injectors, the temperature of the fuel increased during the first run at each concentration.
	www.apdinc.com /Alban.html (1480 words)

	Maximum Flight Time
		The amount of fuel is called the fuel load and is denoted by M (given in units of kilograms or pounds mass).
		The rate at which the fuel is being burned is the fuel mass flow rate (given in kilograms per hour or pounds mass per hour and denoted by mf).
		The fuel mass flow rate is related to the thrust F by a factor called the specific fuel consumption (TSFC).
	www.grc.nasa.gov /WWW/K-12/airplane/ftime.html (692 words)

	Method and apparatus for the control of fuel consumption in an airplane - Patent 4814993
		The main disturbance causing a shift of the specific range maximum to the direction of lower air speeds is the continuous decrease of the airplane's weight, due to the fuel consumption.
		An advantage of the method and apparatus for the control of fuel consumption according to the invention is that by maintaining a constant angle of attack during the intervals between two subsequent searches of the maximum specific range, a flight in optimum conditions with respect to the fuel consumption is ensured.
		The transducers for ground speed 1 and fuel flor rate 2 are connected to a measuring microprocessor 7, which measuring microprocessor is connected in parallel with the computing microprocessor 3 and to the memory unit 17, memory unit 16 and to a second input of the output interface 4.
	www.freepatentsonline.com /4814993.html (2461 words)

	U of Michigan (Site not responding. Last check: 2007-11-07)
		We were able to attain peak cycle pressure, brake specific fuel consumption, spark advance allowed before knock, and maximum brake torque.
		This fuel also served as the base fuel to which the additives were mixed.
		All of the additives and the fuel were combined with a mixing ratio of 2-fl.
	www.engauto.com /test_gas5.htm (504 words)

	GTA Fuel Enhancer Test Results in Different Types of Vehicles and Engines
		The vehicle was instrumented with a differential, positive-displacement fuel meter for real-time measurement of the fuel consumption in the recirculating fuel supply, and fitted with a stroboscopic outrigger for precise measurement of distance.
		Fuel flow to the float chamber of the carburetor was set using a sight glass.
		No comparative brake-specific fuel consumption data were obtained at 6 degrees BTDC for the untreated fuel, or at 10 degrees BTDC for the additive-treated fuel.
	www.apdinc.com /tests.htm (1022 words)

	Annex III - Measuring cooking fuel economy
		Fuel consumption should be measured by weight rather than by volume since it is difficult to measure accurately the volume of a nonuniform fuel such as wood.
		For this measurement, the fuel available to the cook is pre-weighed and the fuel remaining upon the completion of the meal (or the day's meals) is weighed in order to obtain the consumption during cooking.
		Fuel consumption and cooking efficiency tests in the field require the surveyor or researcher to interfere with cooking to some extent.
	www.fao.org /docrep/Q1085e/q1085e0b.htm (7764 words)

	Engine Design
		The amount of fuel is precisely metered by controlling the fuel pressure feeding the injectors and by precisely controlling when the injectors turn on and off.
		Fuel injectors are sized based on their static flow rate in lbs/hr of fuel assuming a fuel pressure of 43.5 psi (3 atmospheres).
		BSFC is the Brake Specific Fuel Consumption and is a measure of the amount of fuel required to achieve one horsepower.
	www.jaytorborg.com /engine_design.htm (9007 words)

	RV.Net Open Roads Forum: Tow Vehicles: What rpm for lowest fuel consumption?
		Fuel consumtion is measured in grams of fuel per horsepower-hour.
		Weighing the fuel compensates for differences in fuel density from refining differences, temperature differences, etc. The fuel tank is actually on a large scale.
		Like you, I supposed that the lowest fuel consumption rate would be near the rpm for maximum torque and was surprised to see that it isn't (at least for this case).
	www.rv.net /forum/index.cfm/fuseaction/thread/tid/14660147.cfm (2031 words)

	Maritime Global Net
		Examining the results it is observed that the fuel additive leads to a slight decrease of the specific fuel consumption for the marine diesel engine.
		The percentage of the specific fuel consumption decrease depends on the additive percentage and also on the time during which the additive was used.
		The use of additive in the fuel oil does not consist a problem for the structure of the combustion chamber as the influence on the peak pressures is very small.
	www.mglobal.com /news/newsreleasedetails.cfm?id=870&type=0 (628 words)

	Advanced Gas Turbine Technology
		This characteristic is the basic reason for the high fuel consumption of any gas turbine which must operate at variable loads and rotations, whether in industrial, power generation or propulsion applications (land, air or sea).
		The basic laws of thermodynamics which apply to all thermal machines in general, and to gas turbines in particular, stipulate the classic Brayton cycle: that the thermal efficiency of the machine is a function of pressure ratio and the corresponding optimum temperature.
		The applications of gas turbines with constant specific fuel consumption are virtually unlimited, making possible the advent of a new era in energy, in land, air and naval propulsion.
	members.aol.com /enginecorp/Business/paulengine/turbine.htm (473 words)

	Specific fuel consumption in Turbines... (Site not responding. Last check: 2007-11-07)
		The test stand i have will shortly be capable of fuel consumption and thrust measurement raw data figures, we can refine that data down as far as we think necessary.
		SFC may be a measure of efficiency, but at the end of the day, we fuel, fly til the tanks are nearly empty, then refuel, recharge and go again....
		(Fuel flight plans for jets are always in kilos or pounds) The only time airline pilots are really concerned with volume is cross checking the loaded fuel volume (fuel bowsers or refuelling trucks measure volume) into weight, or mass.
	www.rcuniverse.com /forum/fb.asp?m=2796731 (2219 words)

	6.2L/6.5L Diesel Fuel Economy - Brake Specific Fuel Consumption, TheDieselPage.com May 2006
		Brake Specific Fuel Consumption (BSFC) is the ratio of fuel consumption to engine power output as measured at the flywheel.
		Fuel atomization (droplet size), cetane rating (combustibility), viscosity, and injection timing and combustion swirl all contribute to diesel efficiency.
		To play with the numbers, simply multiply the decimal fraction of fuel weight by a given horsepower, then divide by the weight of diesel fuel per gallon to get gallons of fuel per hour, then divide a hypothetical average speed by that number of gallons to arrive at miles-per-gallon.
	www.thedieselpage.com /features/bmsfc.htm (809 words)

	EPA: Voluntary Diesel Retrofit Program Retrofit Calculator (Site not responding. Last check: 2007-11-07)
		For some older engine families certified with higher levels of sulfur in the fuel, this is the amount the CL has already been reduced due to the use of lower sulfur fuel.
		The average fuel consumption in units of grams/bhp-hr of a SubFleet.
		A diesel engine currently being fueled with a lower sulphur fuel than with which it was originally certified, may already be emitting less PM than the original baseline certification level.
	www.epa.gov /oms/retrofit/calc/help.htm (2092 words)

	ME 401 INTERNAL COMBUSTION ENGINES
		The specific fuel consumption of a 4 stroke cycle, 4 liter diesel engine operating at 2500 rpm is 220 g/HP-h.
		The specific gas constants during compression and expansion are 0.27 and 0.29 kJ/kg-K respectively.
		The stroke to bore ratio is estimated as 1.2 and the excess air coefficient at rated power operation is assumed as 1.8 The fuel is estimated as C10.8H18.7 with a lower heating value of 42.5 MJ/kg.
	www.me.metu.edu.tr /me401/Common/pset3.html (931 words)

	ALGAE-X Fuel Conditioning, Fuel Treatment, Magnetic Fuel Conditioners, Diesel Fuel
		Fuel studies have shown that diesel fuel starts to deteriorate and form solids within 60-90 days after refining.
		LG-X Series In-line fuel conditioners - These patented fuel conditioners work in conjunction with filters and separators to ensure that your fuel is free of particulates, sediments and water.
		AFC-705 Fuel Catalyst is used to dissolve and eliminate any sludge that has accumulated in tanks and preserves fuel quality for up to 12 months.
	www.algae-x.net (324 words)

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