Contents
How do you calculate fuel flow in an engine?
Expressed as a formula it looks like this:
- Given Horsepower x .50 lb fuel/hp = lbs of fuel for given horsepower.
- 200 lbs/hr / 6.25 lbs/gal = 32 gph.
- BSFC . 50 / 6.25 = . 0800 gallons / horsepower / hour.
- OR.
- BSFC .70 / 6.59 = .106 gallons / horsepower / hour.
- 800 * .106 = 84.80 gph.
How do you calculate petrol distance?
To estimate the fuel cost for a trip you must know the trip distance, the average per litre cost of fuel and the vehicle’s fuel consumption.
- Divide the trip distance by 100.
- Multiply the result of this by the fuel consumption.
- Then multiply this figure by the cost of fuel/litre.
How are thrust and fuel flow values determined?
This program solves these equations and displays the thrust and fuel flow values for a variety of turbine engines. The propulsion system of an aircraft must perform two important roles: During cruise, the engine must provide enough thrust, to balance the aircraft drag while using as little fuel as possible.
How is the mass flow rate of an engine determined?
From the fuel to air ratio, we can obtain the fuel mass flow rate by a simple multiplication. The engine air flow rate is normally set by conditions in the nozzle. We can use the value of fuel to air ratio to determine the engine’s specific fuel consumption.
How is the specific fuel consumption rate defined?
The fuel consumption rate is described in terms of the thrust specific fuel consumption (tsfc), with the symbol c, and defined as the fuel weight flow rate per hour per pound of thrust with the units of pounds per hour per pound, usually expressed as inverse hours (hr −1 ):
Which is better thrust specific or power specific fuel consumption?
The fuel consumption per mile or per kilometre is a more appropriate comparison for aircraft that travel at very different speeds. There also exists power-specific fuel consumption, which equals the thrust-specific fuel consumption divided by speed. It can have units of pounds per hour per horsepower.