1. What is Fuel Flow Calculation?

The fuel flow calculation determines how much fuel an engine consumes based on its horsepower output and brake specific fuel consumption (BSFC). This is essential for engine performance analysis and fuel system design.

2. How Does the Calculator Work?

The calculator uses the fuel flow equation:

Where:

• \( HP \) — Engine horsepower output
• \( BSFC \) — Brake specific fuel consumption (lb/HP-hr)

Explanation: The equation calculates the fuel consumption rate in pounds per hour based on the engine's power output and its specific fuel consumption characteristics.

3. Importance of Fuel Flow Calculation

Details: Accurate fuel flow calculation is crucial for sizing fuel systems, estimating range/endurance, and optimizing engine performance.

4. Using the Calculator

Tips: Enter horsepower and BSFC values. Typical BSFC values range from 0.4-0.6 lb/HP-hr for gasoline engines and 0.35-0.45 lb/HP-hr for diesel engines.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical BSFC value?
A: For gasoline engines, 0.45-0.50 lb/HP-hr is typical. High-performance engines may be 0.40-0.45, while less efficient engines may be 0.50-0.60.

Q2: How does this relate to fuel economy?
A: Lower BSFC values indicate better fuel efficiency. Fuel flow rate directly affects fuel consumption over time.

Q3: Can I use this for different fuel types?
A: Yes, but you'll need the appropriate BSFC value for the specific fuel and engine combination.

Q4: How accurate is this calculation?
A: It provides a theoretical estimate. Actual fuel flow may vary based on engine condition, load, and operating conditions.

Q5: How do I convert lb/hr to gallons/hour?
A: Divide by the fuel's weight per gallon (approximately 6.0 lb/gal for gasoline, 6.8-7.2 lb/gal for diesel).